Local data in EJ2 JavaScript Grid control

7 May 202524 minutes to read

The Syncfusion^® Grid offers a straight forward way to bind local data, such as arrays or JSON objects, to the grid control. This feature allows you to display and manipulate data within the grid without the need for external server calls, making it particularly useful for scenarios where you’re working with static or locally stored data.

To achieve this, you can assign a JavaScript object array to the dataSource property. Additionally, you have an option to provide the local data source using an instance of the DataManager.

The following example demonstrates how to utilize the local data binding feature in the EJ2 JavaScript Grid control:

index.js
index.html
var grid = new ej.grids.Grid({
    dataSource: data.slice(0, 7),
    columns: [
        { field: 'OrderID', headerText: 'Order ID', textAlign: 'Right', width: 120 },
        { field: 'CustomerID', headerText: 'Customer ID',width: 150 },
        { field: 'ShipCity', headerText: 'Ship City',width: 150 },
        { field: 'ShipName', headerText: 'Ship Name',width: 150 }
    ]
});
grid.appendTo('#Grid');
<!DOCTYPE html><html lang="en"><head>
    <title>EJ2 Grid</title>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta name="description" content="Typescript Grid Control">
    <meta name="author" content="Syncfusion">
    <link href="index.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/29.2.4/ej2-base/styles/bootstrap5.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/29.2.4/ej2-grids/styles/bootstrap5.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/29.2.4/ej2-buttons/styles/bootstrap5.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/29.2.4/ej2-popups/styles/bootstrap5.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/29.2.4/ej2-richtexteditor/styles/bootstrap5.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/29.2.4/ej2-navigations/styles/bootstrap5.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/29.2.4/ej2-dropdowns/styles/bootstrap5.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/29.2.4/ej2-lists/styles/bootstrap5.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/29.2.4/ej2-inputs/styles/bootstrap5.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/29.2.4/ej2-calendars/styles/bootstrap5.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/29.2.4/ej2-notifications/styles/bootstrap5.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/29.2.4/ej2-splitbuttons/styles/bootstrap5.css" rel="stylesheet">
<script src="https://cdn.syncfusion.com/ej2/29.2.4/dist/ej2.min.js" type="text/javascript"></script>
<script src="es5-datasource.js" type="text/javascript"></script>
<script src="https://cdn.syncfusion.com/ej2/syncfusion-helper.js" type ="text/javascript"></script>
</head>
<body> 
    <div id="container">
        <div id="Grid"></div>
    </div>
<script>
var ele = document.getElementById('container');
if(ele) {
  ele.style.visibility = "visible";
}   
</script>
<script src="index.js" type="text/javascript"></script>
</body></html>

Data binding with SignalR

The Syncfusion^® Grid provides support for real-time data binding using SignalR, allowing you to update the grid automatically as data changes on the server-side. This feature is particularly useful for applications requiring live updates and synchronization across multiple clients.

To achieve real-time data binding with SignalR in your Syncfusion^® EJ2 JavaScript Grid, follow the steps below:

Step 1: To create a new ASP.NET Core Web API project named signalR, follow these steps:

Open Visual Studio.
Select “Create a new project”
Choose ASP.NET Core Web API project template.
Name the project signalR.
Click “Create”

Step 2: Create a folder named wwwroot in the project root directory. This folder will contain static files served by the web server.

Step 3: Install the SignalR Client Library by following these steps:

In Solution Explorer, right-click the project and choose Add > Client-Side Library.
In the Add Client-Side Library dialog:
- Choose unpkg as the provider.
- Type @microsoft/signalr@latest in the library field.
- Choose Select specific files, expand dist/browser, and check signalr.js and signalr.min.js.
- Specify wwwroot/js/signalr/* as the target location.
- Click Install.

Step 4: Create an index.html file under the wwwroot folde and add the following code:

index.html
<!DOCTYPE html>
<html lang="en">
<head>
    <title>EJ2 Grid</title>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta name="description" content="Javascript Grid Control">
    <meta name="author" content="Syncfusion">
    <link href="https://cdn.syncfusion.com/ej2/27.148/ej2-base/styles/bootstrap5.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/27.148/ej2-grids/styles/bootstrap5.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/27.148/ej2-buttons/styles/bootstrap5.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/27.148/ej2-popups/styles/bootstrap5.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/27.148/ej2-richtexteditor/styles/bootstrap5.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/27.148/ej2-navigations/styles/bootstrap5.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/27.148/ej2-dropdowns/styles/bootstrap5.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/27.148/ej2-lists/styles/bootstrap5.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/27.148/ej2-inputs/styles/bootstrap5.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/27.148/ej2-calendars/styles/bootstrap5.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/27.148/ej2-notifications/styles/bootstrap5.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/27.148/ej2-splitbuttons/styles/bootstrap5.css" rel="stylesheet">
    <script src="https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.19.38/system.js"></script>
    <script src="https://cdn.syncfusion.com/ej2/27.148/dist/ej2.min.js" type="text/javascript"></script>
    <script src="https://cdn.syncfusion.com/ej2/syncfusion-helper.js" type="text/javascript"></script>
</head>
<body>
        <div id="container">
            <div id="Grid"></div>
        </div>
    <script src="js/microsoft/signalr/dist/browser/signalr.js"></script>
    <script src="js/index.js" type="text/javascript"></script>
</body>
</html>

Step 5: Create a js folder under the wwwroot folder, then create an index.js file within the js folder. In your client-side code, establish a connection to the SignalR hub and configure grid data binding in the index.js file.

let data = new ej.data.DataManager({
    url: 'https://localhost:****/api/Grid',
    insertUrl: 'https://localhost:****/api/Grid/Insert',
    updateUrl: 'https://localhost:****/api/Grid/Update',
    removeUrl: 'https://localhost:****/api/Grid/Remove',
    adaptor: new ej.data.UrlAdaptor()
});//Use remote server host instead number ****
let connection = new signalR.HubConnectionBuilder()
    .withUrl("https://localhost:****/ChatHub")  //Use remote server host instead number ****
    .build();

var grid = new ej.grids.Grid({
    dataSource:data,
    toolbar: ['Add', 'Edit', 'Delete', 'Update', 'Cancel'],
    allowPaging: true,
    actionComplete: actionComplete,
    created: onCreated,
    editSettings: { allowEditing: true, allowAdding: true, allowDeleting: true, mode: 'Normal' },
    columns: [
        { field: 'OrderID', headerText: 'Order ID', textAlign: 'Right', width: 120, isPrimaryKey: true, type: 'number' },
        { field: 'CustomerID', width: 140, headerText: 'Customer ID', type: 'string' },
        { field: 'ShipCity', headerText: 'ShipCity', width: 140 },
        { field: 'ShipCountry', headerText: 'ShipCountry', width: 140 }
    ]
});
grid.appendTo('#Grid');

function onCreated() {
    connection.on("ReceiveMessage", (message) => {
        if (grid) {
            grid.refresh();
        }

    });
    connection.start()
        .then(() => {
            console.log("SignalR connection established successfully");
            connection.invoke('SendMessage', "refreshPages")
                .catch((err) => {
                    console.error("Error sending data:", err.toString());
                });
        })
        .catch((err) => {
            console.error("Error establishing SignalR connection:", err.toString());
        });
}
function actionComplete(args) {
    if (args.requestType === "save" || args.requestType === "delete") {
        connection.invoke('SendMessage', "refreshPages")
            .catch((err) => {
                console.error(err.toString());
            });
    }
}

Step 6: Create a SignalR hub on the server-side to manage communication between clients and the server. You can create a ChatHub.cs file under the Hubs folder. Add the following code to define methods for sending data updates to clients:

ChatHub.cs
using Microsoft.AspNetCore.SignalR;

namespace SignalRChat.Hubs
{
    public class ChatHub : Hub 
    {
        public async Task SendMessage(string message)
        {
            await Clients.All.SendAsync("ReceiveMessage", message);
        }
    }
}

Step 7: Configure the SignalR server to route requests to the SignalR hub. In the Program.cs file, add the following code:

Program.cs
using signalR.Hubs;

var builder = WebApplication.CreateBuilder(args);
builder.Services.AddSignalR(); // Add SignalR services

// Add services to the container.

builder.Services.AddControllers();
// Learn more about configuring Swagger/OpenAPI at https://aka.ms/aspnetcore/swashbuckle
builder.Services.AddEndpointsApiExplorer();
builder.Services.AddSwaggerGen();

var app = builder.Build();

// Configure the HTTP request pipeline.
if (app.Environment.IsDevelopment())
{
    app.UseSwagger();
    app.UseSwaggerUI();
}

app.UseHttpsRedirection();
app.UseDefaultFiles();
app.UseStaticFiles();
app.MapHub<ChatHub>("/chatHub"); // Map the ChatHub

app.UseAuthorization();

app.MapControllers();

app.Run();

Step 8 : Create a model class named OrdersDetails.cs under the Models folder in the server-side project to represent the order data. Add the following code.

OrdersDetails.cs
namespace signalR.Models
{
    public class OrdersDetails
    {
        public static List<OrdersDetails> order = new List<OrdersDetails>();
        public OrdersDetails()
        {

        }
        public OrdersDetails(
        int OrderID, string CustomerId, int EmployeeId, double Freight, bool Verified,
        DateTime OrderDate, string ShipCity, string ShipName, string ShipCountry,
        DateTime ShippedDate, string ShipAddress)
        {
            this.OrderID = OrderID;
            this.CustomerID = CustomerId;
            this.EmployeeID = EmployeeId;
            this.Freight = Freight;
            this.ShipCity = ShipCity;
            this.Verified = Verified;
            this.OrderDate = OrderDate;
            this.ShipName = ShipName;
            this.ShipCountry = ShipCountry;
            this.ShippedDate = ShippedDate;
            this.ShipAddress = ShipAddress;
        }

        public static List<OrdersDetails> GetAllRecords()
        {
            if (order.Count() == 0)
            {
                int code = 10000;
                for (int i = 1; i < 10; i++)
                {
                    order.Add(new OrdersDetails(code + 1, "ALFKI", i + 0, 2.3 * i, false, new DateTime(1991, 05, 15), "Berlin", "Simons bistro", "Denmark", new DateTime(1996, 7, 16), "Kirchgasse 6"));
                    order.Add(new OrdersDetails(code + 2, "ANATR", i + 2, 3.3 * i, true, new DateTime(1990, 04, 04), "Madrid", "Queen Cozinha", "Brazil", new DateTime(1996, 9, 11), "Avda. Azteca 123"));
                    order.Add(new OrdersDetails(code + 3, "ANTON", i + 1, 4.3 * i, true, new DateTime(1957, 11, 30), "Cholchester", "Frankenversand", "Germany", new DateTime(1996, 10, 7), "Carrera 52 con Ave. Bolívar #65-98 Llano Largo"));
                    order.Add(new OrdersDetails(code + 4, "BLONP", i + 3, 5.3 * i, false, new DateTime(1930, 10, 22), "Marseille", "Ernst Handel", "Austria", new DateTime(1996, 12, 30), "Magazinweg 7"));
                    order.Add(new OrdersDetails(code + 5, "BOLID", i + 4, 6.3 * i, true, new DateTime(1953, 02, 18), "Tsawassen", "Hanari Carnes", "Switzerland", new DateTime(1997, 12, 3), "1029 - 12th Ave. S."));
                    code += 5;
                }
            }
            return order;
        }

        public int? OrderID { get; set; }
        public string? CustomerID { get; set; }
        public int? EmployeeID { get; set; }
        public double? Freight { get; set; }
        public string? ShipCity { get; set; }
        public bool? Verified { get; set; }
        public DateTime OrderDate { get; set; }
        public string? ShipName { get; set; }
        public string? ShipCountry { get; set; }
        public DateTime ShippedDate { get; set; }
        public string? ShipAddress { get; set; }
    }
}

Step 9: Create a controller on the server-side to manage data operations such as fetching, updating, inserting, and deleting records. You can create a GridController.cs file under the Controllers folder. Add the following code to define methods for sending data updates to clients.

GridController.cs
using Microsoft.AspNetCore.Mvc;
using Syncfusion.EJ2.Base;
using signalR.Models;

namespace siagnalR.Controllers
{
    [ApiController]
    public class GridController : Controller
    {
        [HttpPost]
        [Route("api/[controller]")]
        public object Post([FromBody] DataManagerRequest DataManagerRequest)
        {
            // Retrieve data from the data source (e.g., database)
            IQueryable<OrdersDetails> DataSource = GetOrderData().AsQueryable();

            QueryableOperation queryableOperation = new QueryableOperation(); // Initialize DataOperations instance

            // Handling searching operation
            if (DataManagerRequest.Search != null && DataManagerRequest.Search.Count > 0)
            {
                DataSource = queryableOperation.PerformSearching(DataSource, DataManagerRequest.Search);
            }

            // Handling filtering operation
            if (DataManagerRequest.Where != null && DataManagerRequest.Where.Count > 0)
            {
                foreach (var condition in DataManagerRequest.Where)
                {
                    foreach (var predicate in condition.predicates)
                    {
                        DataSource = queryableOperation.PerformFiltering(DataSource, DataManagerRequest.Where, predicate.Operator);
                    }
                }
            }

            // Handling sorting operation
            if (DataManagerRequest.Sorted != null && DataManagerRequest.Sorted.Count > 0)
            {
                DataSource = queryableOperation.PerformSorting(DataSource, DataManagerRequest.Sorted);
            }

            // Get the total count of records
            int totalRecordsCount = DataSource.Count();

            // Handling paging operation.
            if (DataManagerRequest.Skip != 0)
            {
                DataSource = queryableOperation.PerformSkip(DataSource, DataManagerRequest.Skip);
            }
            if (DataManagerRequest.Take != 0)
            {
                DataSource = queryableOperation.PerformTake(DataSource, DataManagerRequest.Take);
            }

            // Return data based on the request
            return new { result = DataSource, count = totalRecordsCount };
        }

        [HttpGet]
        [Route("api/[controller]")]
        public List<OrdersDetails> GetOrderData()
        {
            var data = OrdersDetails.GetAllRecords().ToList();
            return data;
        }

        /// <summary>
        /// Inserts a new data item into the data collection.
        /// </summary>
        /// <param name="newRecord">It contains the new record detail which is need to be inserted.</param>
        /// <returns>Returns void</returns>
        [HttpPost]
        [Route("api/Grid/Insert")]
        public void Insert([FromBody] CRUDModel<OrdersDetails> newRecord)
        {
            if (newRecord.value != null)
            {
                OrdersDetails.GetAllRecords().Insert(0, newRecord.value);
            }
        }

        /// <summary>
        /// Update a existing data item from the data collection.
        /// </summary>
        /// <param name="Order">It contains the updated record detail which is need to be updated.</param>
        /// <returns>Returns void</returns>
        [HttpPost]
        [Route("api/Grid/Update")]
        public void Update([FromBody] CRUDModel<OrdersDetails> Order)
        {
            var updatedOrder = Order.value;
            if (updatedOrder != null)
            {
                var data = OrdersDetails.GetAllRecords().FirstOrDefault(or => or.OrderID == updatedOrder.OrderID);
                if (data != null)
                {
                    // Update the existing record
                    data.OrderID = updatedOrder.OrderID;
                    data.CustomerID = updatedOrder.CustomerID;
                    data.ShipCity = updatedOrder.ShipCity;
                    data.ShipCountry = updatedOrder.ShipCountry;
                    // Update other properties similarly
                }
            }

        }
        /// <summary>
        /// Remove a specific data item from the data collection.
        /// </summary>
        /// <param name="value">It contains the specific record detail which is need to be removed.</param>
        /// <return>Returns void</return>
        [HttpPost]
        [Route("api/Grid/Remove")]
        public void Remove([FromBody] CRUDModel<OrdersDetails> value)
        {
            int orderId = int.Parse((value.key).ToString());
            var data = OrdersDetails.GetAllRecords().FirstOrDefault(orderData => orderData.OrderID == orderId);
            if (data != null)
            {
                // Remove the record from the data collection
                OrdersDetails.GetAllRecords().Remove(data);
            }
        }

        /// <summary>
        /// Perform all the CRUD operation at server-side using a single method instead of specifying separate controller action method for CRUD (insert, update and delete) operations.
        /// </summary>
        /// <param name="request"></param>
        [HttpPost]
        [Route("api/[controller]/CrudUpdate")]
        public void CrudUpdate([FromBody] CRUDModel<OrdersDetails> request)
        {
            if (request.action == "update")
            {
                // Update record
                var orderValue = request.value;
                OrdersDetails existingRecord = OrdersDetails.GetAllRecords().FirstOrDefault(or => or.OrderID == orderValue.OrderID);

                if (orderValue != null && existingRecord != null)
                {
                    existingRecord.OrderID = orderValue.OrderID;
                    existingRecord.CustomerID = orderValue.CustomerID;
                    existingRecord.ShipCity = orderValue.ShipCity;
                }

            }
            else if (request.action == "insert")
            {
                // Insert record
                if (request.value != null)
                {
                    OrdersDetails.GetAllRecords().Insert(0, request.value);
                }
            }
            else if (request.action == "remove")
            {
                // Delete record
                OrdersDetails.GetAllRecords().Remove(OrdersDetails.GetAllRecords().FirstOrDefault(or => or.OrderID == int.Parse(request.key.ToString())));
            }

        }
        [HttpPost]
        [Route("api/[controller]/BatchUpdate")]
        public IActionResult BatchUpdate([FromBody] CRUDModel<OrdersDetails> batchmodel)
        {
            if (batchmodel.added != null)
            {
                foreach (var addedOrder in batchmodel.added)
                {
                    OrdersDetails.GetAllRecords().Insert(0, addedOrder);
                }
            }
            if (batchmodel.changed != null)
            {
                foreach (var changedOrder in batchmodel.changed)
                {
                    var existingOrder = OrdersDetails.GetAllRecords().FirstOrDefault(or => or.OrderID == changedOrder.OrderID);
                    if (existingOrder != null)
                    {
                        existingOrder.CustomerID = changedOrder.CustomerID;
                        existingOrder.ShipCity = changedOrder.ShipCity;
                        existingOrder.ShipCountry = changedOrder.ShipCountry;
                        // Update other properties as needed
                    }
                }
            }
            if (batchmodel.deleted != null)
            {
                foreach (var deletedOrder in batchmodel.deleted)
                {
                    var orderToDelete = OrdersDetails.GetAllRecords().FirstOrDefault(or => or.OrderID == deletedOrder.OrderID);
                    if (orderToDelete != null)
                    {
                        OrdersDetails.GetAllRecords().Remove(orderToDelete);
                    }
                }
            }
            return Json(batchmodel);
        }


        public class CRUDModel<T> where T : class
        {

            public string? action { get; set; }

            public string? keyColumn { get; set; }

            public object? key { get; set; }

            public T? value { get; set; }

            public List<T>? added { get; set; }

            public List<T>? changed { get; set; }

            public List<T>? deleted { get; set; }

            public IDictionary<string, object>? @params { get; set; }
        }
    }
}

Step 10: Comment out the below line in launchSettings.json:

    "https": {
      "commandName": "Project",
      "dotnetRunMessages": true,
      "launchBrowser": true,
     // "launchUrl": "swagger",
      "applicationUrl": "https://localhost:xxxx;http://localhost:xxxx",
      "environmentVariables": {
        "ASPNETCORE_ENVIRONMENT": "Development"
      }
    },

The following screenshot represents the addition, editing, and deletion operations performed, reflecting changes across all client sides.

signalR

You can find a complete sample for signalR on GitHub.

In an API service project, add Syncfusion.EJ2.AspNet.Core by opening the NuGet package manager in Visual Studio (Tools → NuGet Package Manager → Manage NuGet Packages for Solution), search and install it.

To access DataManagerRequest and QueryableOperation, import Syncfusion.EJ2.Base in GridController.cs file.

Binding data from excel file

The Syncfusion^® Grid control allows you to import data from Excel files into your web application for display and manipulation within the grid. This feature streamlines the process of transferring Excel data to a web-based environment. This can be achieved by using Uploader control change event.

To bind data from an Excel file to a Syncfusion^® Grid control, including the xlsx library via a script tag in an HTML page

<script type="text/javascript" src="https://unpkg.com/xlsx@0.15.1/dist/xlsx.full.min.js"></script>

To import excel data in to grid, you can follow these steps:

Import excel file using Uploader control.
Parse the excel file data using XLSX library.
Bind the JSON to the grid control.

The following example demonstrates how to import Excel data into the grid by utilizing the Uploader control’s change event along with the XLSX library:

index.js
index.html
let path = {
    saveUrl:
      'https://services.syncfusion.com/js/production/api/FileUploader/Save',
    removeUrl:
      'https://services.syncfusion.com/js/production/api/FileUploader/Remove',
  };
  function onRemove(args) {
    grid.dataSource = [''];
    grid.columns = [];
  }
  function onSuccess(args) {
    var files = args.file;
    if (files) {
      parseExcel(files[0]);
    }
  }
  
  var dropElement = document.getElementsByClassName('control-fluid')[0];
  var uploadObject = new ej.inputs.Uploader({
    asyncSettings: path,
    removing: onRemove,
    change: onSuccess,
    dropArea: dropElement,
  });
  uploadObject.appendTo('#fileupload');
  var grid = new ej.grids.Grid({});
  grid.appendTo('#Grid');
  function parseExcel(file) {
    if (file && file.type == 'xlsx') {
      var reader = new FileReader();
      reader.onload = (e) => {
        var data = (e.target).result;
        var workbook = XLSX.read(data, { type: 'array' });
        workbook.SheetNames.forEach((sheetName) => {
          var XL_row_object = XLSX.utils.sheet_to_json(workbook.Sheets[sheetName]);
          if (Array.isArray(XL_row_object) && XL_row_object.length > 0) {
            grid.dataSource = XL_row_object;
          } else {
            dialog.content = "Invalid JSON";
            dialog.show();
          }
        });
      };
      reader.readAsArrayBuffer(file.rawFile);
  
    } else {
      dialog.content = 'Please upload only .xlsx format';
      dialog.show();
    }
  }
  
  var dialog = new ej.popups.Dialog({
    content: 'Invalid JSON',
    width: 350,
    visible: false,
    header: 'Alert',
    showCloseIcon: true,
  });
  dialog.appendTo('#dialog');
<!DOCTYPE html><html lang="en"><head>
    <title>EJ2 Grid</title>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta name="description" content="Typescript Grid Control">
    <meta name="author" content="Syncfusion">
    <link href="index.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/29.2.4/ej2-base/styles/bootstrap5.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/29.2.4/ej2-grids/styles/bootstrap5.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/29.2.4/ej2-buttons/styles/bootstrap5.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/29.2.4/ej2-popups/styles/bootstrap5.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/29.2.4/ej2-richtexteditor/styles/bootstrap5.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/29.2.4/ej2-navigations/styles/bootstrap5.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/29.2.4/ej2-dropdowns/styles/bootstrap5.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/29.2.4/ej2-lists/styles/bootstrap5.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/29.2.4/ej2-inputs/styles/bootstrap5.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/29.2.4/ej2-calendars/styles/bootstrap5.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/29.2.4/ej2-notifications/styles/bootstrap5.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/29.2.4/ej2-splitbuttons/styles/bootstrap5.css" rel="stylesheet">
<script src="https://cdn.syncfusion.com/ej2/29.2.4/dist/ej2.min.js" type="text/javascript"></script>
<script type="text/javascript" src="https://unpkg.com/xlsx@0.15.1/dist/xlsx.full.min.js"></script>
<script src="https://cdn.syncfusion.com/ej2/syncfusion-helper.js" type ="text/javascript"></script>
</head>
<body> 
    <div id="container">
        <label style="padding:20px 0px 20px 0px">Browse excel file to load and return grid</label>
        <input type="file" id="fileupload" name="UploadFiles"/>
        <div id="Grid"></div>
        <div id="dialog"></div>
    </div>
<script>
var ele = document.getElementById('container');
if(ele) {
  ele.style.visibility = "visible";
}   
</script>
<script src="index.js" type="text/javascript"></script>
</body></html>

Binding data and performing CRUD actions via Fetch request

The Syncfusion^® Grid provides a seamless way to bind data from external sources using Fetch requests, facilitating CRUD (Create, Read, Update, Delete) operations with data retrieved from a server. This feature is particularly valuable for sending data to a server for database updates and asynchronously retrieving data without refreshing the entire web page.

To achieve data binding and perform CRUD actions using Fetch requests in the Syncfusion^® Grid, follow these steps:

Step 1: To create a new ASP.NET Core Web API project named FetchRequest, follow these steps:

Open Visual Studio.
Select “Create a new project”
Choose ASP.NET Core Web API project template.
Name the project FetchRequest.
Click “Create”

Step 2: Comment out the below line in launchSettings.json:

    "https": {
      "commandName": "Project",
      "dotnetRunMessages": true,
      "launchBrowser": true,
     // "launchUrl": "swagger",
      "applicationUrl": "https://localhost:xxxx;http://localhost:xxxx",
      "environmentVariables": {
        "ASPNETCORE_ENVIRONMENT": "Development"
      }
    },

Step 3: In the Program.cs file, add the following code:

Program.cs
var builder = WebApplication.CreateBuilder(args);

// Add services to the container.

builder.Services.AddControllers();
// Learn more about configuring Swagger/OpenAPI at https://aka.ms/aspnetcore/swashbuckle
builder.Services.AddEndpointsApiExplorer();
builder.Services.AddSwaggerGen();

var app = builder.Build();

// Configure the HTTP request pipeline.
if (app.Environment.IsDevelopment())
{
    app.UseSwagger();
    app.UseSwaggerUI();
}

app.UseHttpsRedirection();

app.UseAuthorization();
app.UseDefaultFiles();
app.MapControllerRoute(
    name: "default",
    pattern: "{controller=Grid}/{action=Index}");
app.UseStaticFiles();
app.MapControllers();

app.Run();

Step 4: Create a folder named wwwroot in the project root directory. This folder will contain static files served by the web server.

Step 5: Create an index.html file under the wwwroot folde and add the following code:

index.html
<!DOCTYPE html>
<html lang="en">
<head>
    <title>EJ2 Grid</title>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta name="description" content="Javascript Grid Control">
    <meta name="author" content="Syncfusion">
    <link href="https://cdn.syncfusion.com/ej2/27.148/ej2-base/styles/bootstrap5.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/27.148/ej2-grids/styles/bootstrap5.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/27.148/ej2-buttons/styles/bootstrap5.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/27.148/ej2-popups/styles/bootstrap5.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/27.148/ej2-richtexteditor/styles/bootstrap5.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/27.148/ej2-navigations/styles/bootstrap5.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/27.148/ej2-dropdowns/styles/bootstrap5.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/27.148/ej2-lists/styles/bootstrap5.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/27.148/ej2-inputs/styles/bootstrap5.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/27.148/ej2-calendars/styles/bootstrap5.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/27.148/ej2-notifications/styles/bootstrap5.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/27.148/ej2-splitbuttons/styles/bootstrap5.css" rel="stylesheet">
    <script src="https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.19.38/system.js"></script>
    <script src="https://cdn.syncfusion.com/ej2/27.148/dist/ej2.min.js" type="text/javascript"></script>
    <script src="https://cdn.syncfusion.com/ej2/syncfusion-helper.js" type="text/javascript"></script>
</head>
<body>
    <div class='col-md-9'>
        <div style="padding-bottom: 10px; padding-top:10px">
            <button ejs-button id="buttons" cssClass="e-small"></button>
        </div>
        <div id="container">
            <div id="Grid"></div>
        </div>
    </div>
        <script src="js/index.js" type="text/javascript"></script>
</body>
</html>

Step 6: Create a js folder under the wwwroot folder, then create an index.js file within the js folder and follow the steps below:

A. To bind data from an external Fetch request, utilize the dataSource property of the Grid. Fetch data from the server and provide it to the dataSource property using the onSuccess event of the Fetch request.

B. To perform CRUD actions, leverage the actionBegin event. You can cancel the default CRUD operations by utilizing the cancel argument provided by this event. This allows you to dynamically call your server-side method using Fetch, along with the relevant data received from the actionBegin event, to update your server data accordingly.

C. In the Fetch success event, you have the flexibility to utilize the Grid endEdit and deleteRecord methods to handle the addition, editing, and deletion of corresponding data in the Grid. However, invoking these methods triggers the actionBegin event once again to save the changes in the Grid. To prevent this behavior and maintain control over the execution flow, you can employ a flag variable and manage it within the actionComplete and Fetch failure events: The following code snippet demonstrates this approach:

index.js
var grid = new ej.grids.Grid({
    toolbar: ['Add', 'Edit', 'Delete', 'Update', 'Cancel'],
    allowPaging: true,
    actionBegin: actionBegin,
    actionComplete: actionComplete,
    editSettings: { allowEditing: true, allowAdding: true, allowDeleting: true, mode: 'Normal' },
    columns: [
        { field: 'OrderID', headerText: 'Order ID', textAlign: 'Right', width: 120, isPrimaryKey: true, type: 'number' },
        { field: 'CustomerID', width: 140, headerText: 'Customer ID', type: 'string' },
        { field: 'ShipCity', headerText: 'ShipCity', width: 140 },
        { field: 'ShipCountry', headerText: 'ShipCountry', width: 140 }
    ]
});
grid.appendTo('#Grid');

var button = new ej.buttons.Button({
    content: 'Bind data via Fetch',
    cssClass: 'e-success'
});
button.appendTo('#buttons');
let flag = false;

document.getElementById('buttons').onclick = function () {
    const fetchRequest = new ej.base.Fetch("https://localhost:****/Grid/Getdata", 'POST'); //Use remote server host instead number ****
    fetchRequest.send();
    fetchRequest.onSuccess = (data) => {
        grid.dataSource = data;
    };
};

function actionComplete(e) {
    if (e.requestType === 'save' || e.requestType === 'delete') {
        flag = false;
    }
}
function actionBegin(e) {

    if (!flag) {
        if (e.requestType == 'save' && (e.action == 'add')) {
            var editedData = e.data;
            e.cancel = true;
            var fetchRequest = new ej.base.Fetch({
                url: 'https://localhost:****/Grid/Insert',
                type: 'POST',
                contentType: 'application/json; charset=utf-8',
                data: JSON.stringify({ value: editedData })
            });//Use remote server host instead number ****
            fetchRequest.onSuccess = () => {
                flag = true;
                grid.endEdit();
            };
            fetchRequest.onFailure = () => {
                flag = false;
            };
            fetchRequest.send();
        }
        if (e.requestType == 'save' && (e.action == "edit")) {
            var editedData = e.data;
            e.cancel = true;
            var fetchRequest = new ej.base.Fetch({
                url: 'https://localhost:****/Grid/Update',
                type: 'POST',
                contentType: 'application/json; charset=utf-8',
                data: JSON.stringify({ value: editedData })
            }); //Use remote server host instead number ****
            fetchRequest.onSuccess = () => {
                flag = true;
                grid.endEdit();
            };
            fetchRequest.onFailure = () => {
                flag = false;
            };
            fetchRequest.send();
        }
        if (e.requestType == 'delete') {
            var editedData = e.data;
            e.cancel = true;
            var fetchRequest = new ej.base.Fetch({
                url: 'https://localhost:****/Grid/Delete',
                type: 'POST',
                contentType: 'application/json; charset=utf-8',
                data: JSON.stringify({ key: editedData[0][grid.getPrimaryKeyFieldNames()[0]] })
            });//Use remote server host instead number ****
            fetchRequest.onSuccess = () => {
                flag = true;
                grid.deleteRecord();
            };
            fetchRequest.onFailure = () => {
                flag = false;
            };
            fetchRequest.send();
        }
    }
}

Step 7: Create a GridController.cs file in the Controllers folder. On the server side, there is a method named GetData within the GridController that provides the data source for the grid. When the button is clicked, a Fetch request is sent to retrieve the data from the server and bind it to the Grid component. Additionally, implement server-side logic to perform add, edit, and delete operations.

GridController.cs
using FetchRequest.Models;
using Microsoft.AspNetCore.Mvc;

namespace FetchRequest.Controllers
{
    public class GridController : Controller
    {

        public ActionResult Getdata()
        {
            var DataSource = OrdersDetails.GetAllRecords();
            return Json(DataSource);
        }
        //update the record in server side
        public ActionResult Update([FromBody] CRUDModel<OrdersDetails> value)
        {
            var ord = value.value;
            OrdersDetails val = OrdersDetails.GetAllRecords().Where(or => or.OrderID == ord.OrderID).FirstOrDefault();
            val.OrderID = ord.OrderID;
            val.EmployeeID = ord.EmployeeID;
            val.CustomerID = ord.CustomerID;
            val.Freight = ord.Freight;
            val.OrderDate = ord.OrderDate;
            val.ShipCity = ord.ShipCity;
            val.ShipCountry = ord.ShipCountry;

            return Json(value.value);
        }


        //insert the record
        public ActionResult Insert([FromBody] CRUDModel<OrdersDetails> value)
        {

            OrdersDetails.GetAllRecords().Insert(0, value.value);
            return Json(value.value);
        }

        //Delete the record
        public ActionResult Delete(int key)
        {
            OrdersDetails.GetAllRecords().Remove(OrdersDetails.GetAllRecords().Where(or => or.OrderID == key).FirstOrDefault());
            var data = OrdersDetails.GetAllRecords();
            return Json(data);
        }
    }

}

public class CRUDModel<T> where T : class
{
    public string action { get; set; }
    public string table { get; set; }
    public string keyColumn { get; set; }
    public object key { get; set; }
    public T value { get; set; }
    public List<T> added { get; set; }
    public List<T> changed { get; set; }
    public List<T> deleted { get; set; }
    public IDictionary<string, object> @params { get; set; }
}

Step 8: Create a model class named OrdersDetails.cs under the Models folder in the server-side project to represent the order data.

GridController.cs
namespace FetchRequest.Models
{
    public class OrdersDetails
    {
        public static List<OrdersDetails> order = new List<OrdersDetails>();
        public OrdersDetails()
        {

        }
        public OrdersDetails(
        int OrderID, string CustomerId, int EmployeeId, double Freight, bool Verified,
        DateTime OrderDate, string ShipCity, string ShipName, string ShipCountry,
        DateTime ShippedDate, string ShipAddress)
        {
            this.OrderID = OrderID;
            this.CustomerID = CustomerId;
            this.EmployeeID = EmployeeId;
            this.Freight = Freight;
            this.ShipCity = ShipCity;
            this.Verified = Verified;
            this.OrderDate = OrderDate;
            this.ShipName = ShipName;
            this.ShipCountry = ShipCountry;
            this.ShippedDate = ShippedDate;
            this.ShipAddress = ShipAddress;
        }

        public static List<OrdersDetails> GetAllRecords()
        {
            if (order.Count() == 0)
            {
                int code = 10000;
                for (int i = 1; i < 10; i++)
                {
                    order.Add(new OrdersDetails(code + 1, "ALFKI", i + 0, 2.3 * i, false, new DateTime(1991, 05, 15), "Berlin", "Simons bistro", "Denmark", new DateTime(1996, 7, 16), "Kirchgasse 6"));
                    order.Add(new OrdersDetails(code + 2, "ANATR", i + 2, 3.3 * i, true, new DateTime(1990, 04, 04), "Madrid", "Queen Cozinha", "Brazil", new DateTime(1996, 9, 11), "Avda. Azteca 123"));
                    order.Add(new OrdersDetails(code + 3, "ANTON", i + 1, 4.3 * i, true, new DateTime(1957, 11, 30), "Cholchester", "Frankenversand", "Germany", new DateTime(1996, 10, 7), "Carrera 52 con Ave. Bolívar #65-98 Llano Largo"));
                    order.Add(new OrdersDetails(code + 4, "BLONP", i + 3, 5.3 * i, false, new DateTime(1930, 10, 22), "Marseille", "Ernst Handel", "Austria", new DateTime(1996, 12, 30), "Magazinweg 7"));
                    order.Add(new OrdersDetails(code + 5, "BOLID", i + 4, 6.3 * i, true, new DateTime(1953, 02, 18), "Tsawassen", "Hanari Carnes", "Switzerland", new DateTime(1997, 12, 3), "1029 - 12th Ave. S."));
                    code += 5;
                }
            }
            return order;
        }

        public int? OrderID { get; set; }
        public string? CustomerID { get; set; }
        public int? EmployeeID { get; set; }
        public double? Freight { get; set; }
        public string? ShipCity { get; set; }
        public bool? Verified { get; set; }
        public DateTime OrderDate { get; set; }
        public string? ShipName { get; set; }
        public string? ShipCountry { get; set; }
        public DateTime ShippedDate { get; set; }
        public string? ShipAddress { get; set; }
    }
}

The following screenshot represents loading data when the button is clicked and CRUD operations are performed:

Fetch

You can find a complete sample for binding data and performing CRUD actions via Fetch requests on GitHub

Display the loading indicator with local data.

The Syncfusion^® Grid allows you to display a loading indicator while loading local data. This feature is useful when there is a delay in loading data from a local source, and you want to inform the you that the data is being fetched.

To display the loading indicator with local data, you need to set the showSpinner property to true. This property controls the visibility of the loading indicator.

The following example demonstrates how to display the loading indicator in the Syncfusion^® Grid using the load and created events:

index.js
let isDataLoading =true

var grid = new ej.grids.Grid({
  allowPaging: true,
  created:created,
  load:load,
  pageSettings: { pageCount: 3,pageSize: 5 },
  columns: [
    { field: 'OrderID', headerText: 'Order ID', textAlign: 'Right', width: 120 },
    { field: 'CustomerName', headerText: 'Customer Name', width: 150 },
    { field: 'OrderDate', headerText: 'Order Date', width: 130, format: 'yMd', textAlign: 'Right' },
    { field: 'Freight', headerText: 'Freight', width: 120, format: 'C2', textAlign: 'Right' },
    { field: 'ShippedDate', headerText: 'Shipped Date', width: 140, format: 'yMd', textAlign: 'Right' },
    { field: 'ShipCountry', headerText: 'Ship Country', width: 150 }
  ],
  height: 315
});
grid.appendTo('#Grid');

function load() {
  if (isDataLoading) { 
    grid.showSpinner();
  }
}

function created(){
  isDataLoading = true;
  grid.dataSource = data;
}

Binding data and performing CRUD actions via AJAX request

The Syncfusion^® Grid provides a seamless way to bind data from external sources using AJAX requests, facilitating CRUD (Create, Read, Update, Delete) operations with data retrieved from a server. This feature is particularly valuable for sending data to a server for database updates and asynchronously retrieving data without refreshing the entire web page

To achieve data binding and perform CRUD actions using Ajax requests in the Syncfusion^® Grid, follow these steps:

Step 1: To create a new ASP.NET Core Web API project named AJAXRequest, follow these steps:

Open Visual Studio.
Select “Create a new project”
Choose ASP.NET Core Web API project template.
Name the project AJAXRequest.
Click “Create”

Step 2: Comment out the below line in launchSettings.json:

    "https": {
      "commandName": "Project",
      "dotnetRunMessages": true,
      "launchBrowser": true,
     // "launchUrl": "swagger",
      "applicationUrl": "https://localhost:xxxx;http://localhost:xxxx",
      "environmentVariables": {
        "ASPNETCORE_ENVIRONMENT": "Development"
      }
    },

Step 3: In the Program.cs file, add the following code:

Program.cs
var builder = WebApplication.CreateBuilder(args);

// Add services to the container.

builder.Services.AddControllers();
// Learn more about configuring Swagger/OpenAPI at https://aka.ms/aspnetcore/swashbuckle
builder.Services.AddEndpointsApiExplorer();
builder.Services.AddSwaggerGen();

var app = builder.Build();

// Configure the HTTP request pipeline.
if (app.Environment.IsDevelopment())
{
    app.UseSwagger();
    app.UseSwaggerUI();
}

app.UseHttpsRedirection();

app.UseAuthorization();
app.UseDefaultFiles();
app.MapControllerRoute(
    name: "default",
    pattern: "{controller=Grid}/{action=Index}");
app.UseStaticFiles();
app.MapControllers();

app.Run();

Step 4: Create a folder named wwwroot in the project root directory. This folder will contain static files served by the web server.

Step 5: Create an index.html file under the wwwroot folde and add the following code::

index.html
<!DOCTYPE html>
<html lang="en">
<head>
    <title>EJ2 Grid</title>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta name="description" content="Javascript Grid Control">
    <meta name="author" content="Syncfusion">
    <link href="https://cdn.syncfusion.com/ej2/27.148/ej2-base/styles/bootstrap5.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/27.148/ej2-grids/styles/bootstrap5.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/27.148/ej2-buttons/styles/bootstrap5.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/27.148/ej2-popups/styles/bootstrap5.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/27.148/ej2-richtexteditor/styles/bootstrap5.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/27.148/ej2-navigations/styles/bootstrap5.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/27.148/ej2-dropdowns/styles/bootstrap5.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/27.148/ej2-lists/styles/bootstrap5.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/27.148/ej2-inputs/styles/bootstrap5.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/27.148/ej2-calendars/styles/bootstrap5.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/27.148/ej2-notifications/styles/bootstrap5.css" rel="stylesheet">
    <link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.1.2/css/bootstrap.min.css">
    <link href="https://cdn.syncfusion.com/ej2/27.148/ej2-splitbuttons/styles/bootstrap5.css" rel="stylesheet">
    <script src="https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.19.38/system.js"></script>
    <script src="https://cdn.syncfusion.com/ej2/27.148/dist/ej2.min.js" type="text/javascript"></script>
    <script src="https://cdn.syncfusion.com/ej2/syncfusion-helper.js" type="text/javascript"></script>
</head>
<body>
    <div class='col-md-9'>
        <div style="padding-bottom: 10px; padding-top:10px">
            <button ejs-button id="buttons" cssClass="e-small"></button>
        </div>
        <div id="container">
            <div id="Grid"></div>
        </div>
    </div>
        <script src="js/index.js" type="text/javascript"></script>
</body>
</html>

Step 6: Create a js folder under the wwwroot folder, then create an index.js file within the js folder and follow the steps below:

A. To bind data from an external AJAX request, utilize the dataSource property of the Grid. AJAX data from the server and provide it to the dataSource property using the onSuccess event of the AJAX request.

B. To perform CRUD actions, leverage the actionBegin event. You can cancel the default CRUD operations by utilizing the cancel argument provided by this event. This allows you to dynamically call your server-side method using AJAX, along with the relevant data received from the actionBegin event, to update your server data accordingly.

C. In the AJAX success event, you have the flexibility to utilize the Grid endEdit and deleteRecord methods to handle the addition, editing, and deletion of corresponding data in the Grid. However, invoking these methods triggers the actionBegin event once again to save the changes in the Grid. To prevent this behavior and maintain control over the execution flow, you can employ a flag variable and manage it within the actionComplete and AJAX failure events: The following code snippet demonstrates this approach:

index.js
var grid = new ej.grids.Grid({
    toolbar: ['Add', 'Edit', 'Delete', 'Update', 'Cancel'],
    allowPaging: true,
    actionBegin: actionBegin,
    actionComplete: actionComplete,
    editSettings: { allowEditing: true, allowAdding: true, allowDeleting: true, mode: 'Normal' },
    columns: [
        { field: 'OrderID', headerText: 'Order ID', textAlign: 'Right', width: 120, isPrimaryKey: true, type: 'number' },
        { field: 'CustomerID', width: 140, headerText: 'Customer ID', type: 'string' },
        { field: 'ShipCity', headerText: 'ShipCity', width: 140 },
        { field: 'ShipCountry', headerText: 'ShipCountry', width: 140 }
    ]
});
grid.appendTo('#Grid');

var button = new ej.buttons.Button({
    content: 'Bind data via AJAX',
    cssClass: 'e-success'
});
button.appendTo('#buttons');
let flag = false;

document.getElementById('buttons').onclick = function () {
    const ajaxRequest = new ej.base.Ajax("https://localhost:****/Grid/Getdata", 'POST');  //Use remote server host instead number ****
    ajaxRequest.send();
    ajaxRequest.onSuccess = (data) => {
        grid.dataSource = JSON.parse(data);
    };
};

function actionComplete(e) {
    if (e.requestType === 'save' || e.requestType === 'delete') {
        flag = false;
    }
}
function actionBegin(e) {

    if (!flag) {
        if (e.requestType == 'save' && (e.action == 'add')) {
            var editedData = e.data;
            e.cancel = true;
            var ajaxRequest = new ej.base.Ajax({
                url: 'https://localhost:****/Grid/Insert',
                type: 'POST',
                contentType: 'application/json; charset=utf-8',
                data: JSON.stringify({ value: editedData })
            }); //Use remote server host instead number ****
            ajaxRequest.onSuccess = () => {
                flag = true;
                grid.endEdit();
            };
            ajaxRequest.onFailure = () => {
                flag = false;
            };
            ajaxRequest.send();
        }
        if (e.requestType == 'save' && (e.action == "edit")) {
            var editedData = e.data;
            e.cancel = true;
            var ajaxRequest = new ej.base.Ajax({
                url: 'https://localhost:****/Grid/Update',
                type: 'POST',
                contentType: 'application/json; charset=utf-8',
                data: JSON.stringify({ value: editedData })
            }); //Use remote server host instead number ****
            ajaxRequest.onSuccess = () => {
                flag = true;
                grid.endEdit();
            };
            ajaxRequest.onFailure = () => {
                flag = false;
            };
            ajaxRequest.send();
        }
        if (e.requestType == 'delete') {
            var editedData = e.data;
            e.cancel = true;
            var ajaxRequest = new ej.base.Ajax({
                url: 'https://localhost:****/Grid/Delete',
                type: 'POST',
                contentType: 'application/json; charset=utf-8',
                data: JSON.stringify({ key: editedData[0][grid.getPrimaryKeyFieldNames()[0]] })
            });//Use remote server host instead number ****
            ajaxRequest.onSuccess = () => {
                flag = true;
                grid.deleteRecord();
            };
            ajaxRequest.onFailure = () => {
                flag = false;
            };
            ajaxRequest.send();
        }
    }
}

Step 7: Create a GridController.cs file in the Controllers folder. On the server side, there is a method named GetData within the GridController that provides the data source for the grid. When the button is clicked, a AJAX request is sent to retrieve the data from the server and bind it to the Grid component. Additionally, implement server-side logic to perform add, edit, and delete operations.

GridController.cs
using AJAXRequest.Models;
using Microsoft.AspNetCore.Mvc;

namespace AJAXRequest.Controllers
{
    public class GridController : Controller
    {

        public ActionResult Getdata()
        {
            var DataSource = OrdersDetails.GetAllRecords();
            return Json(DataSource);
        }
        //update the record in server side
        public ActionResult Update([FromBody] CRUDModel<OrdersDetails> value)
        {
            var ord = value.value;
            OrdersDetails val = OrdersDetails.GetAllRecords().Where(or => or.OrderID == ord.OrderID).FirstOrDefault();
            val.OrderID = ord.OrderID;
            val.EmployeeID = ord.EmployeeID;
            val.CustomerID = ord.CustomerID;
            val.Freight = ord.Freight;
            val.OrderDate = ord.OrderDate;
            val.ShipCity = ord.ShipCity;
            val.ShipCountry = ord.ShipCountry;

            return Json(value.value);
        }


        //insert the record
        public ActionResult Insert([FromBody] CRUDModel<OrdersDetails> value)
        {

            OrdersDetails.GetAllRecords().Insert(0, value.value);
            return Json(value.value);
        }

        //Delete the record
        public ActionResult Delete(int key)
        {
            OrdersDetails.GetAllRecords().Remove(OrdersDetails.GetAllRecords().Where(or => or.OrderID == key).FirstOrDefault());
            var data = OrdersDetails.GetAllRecords();
            return Json(data);
        }
    }

}

public class CRUDModel<T> where T : class
{
    public string action { get; set; }
    public string table { get; set; }
    public string keyColumn { get; set; }
    public object key { get; set; }
    public T value { get; set; }
    public List<T> added { get; set; }
    public List<T> changed { get; set; }
    public List<T> deleted { get; set; }
    public IDictionary<string, object> @params { get; set; }
}

Step 8: Create a model class named OrdersDetails.cs under the Models folder in the server-side project to represent the order data.

GridController.cs
namespace AJAXRequest.Models
{
    public class OrdersDetails
    {
        public static List<OrdersDetails> order = new List<OrdersDetails>();
        public OrdersDetails()
        {

        }
        public OrdersDetails(
        int OrderID, string CustomerId, int EmployeeId, double Freight, bool Verified,
        DateTime OrderDate, string ShipCity, string ShipName, string ShipCountry,
        DateTime ShippedDate, string ShipAddress)
        {
            this.OrderID = OrderID;
            this.CustomerID = CustomerId;
            this.EmployeeID = EmployeeId;
            this.Freight = Freight;
            this.ShipCity = ShipCity;
            this.Verified = Verified;
            this.OrderDate = OrderDate;
            this.ShipName = ShipName;
            this.ShipCountry = ShipCountry;
            this.ShippedDate = ShippedDate;
            this.ShipAddress = ShipAddress;
        }

        public static List<OrdersDetails> GetAllRecords()
        {
            if (order.Count() == 0)
            {
                int code = 10000;
                for (int i = 1; i < 10; i++)
                {
                    order.Add(new OrdersDetails(code + 1, "ALFKI", i + 0, 2.3 * i, false, new DateTime(1991, 05, 15), "Berlin", "Simons bistro", "Denmark", new DateTime(1996, 7, 16), "Kirchgasse 6"));
                    order.Add(new OrdersDetails(code + 2, "ANATR", i + 2, 3.3 * i, true, new DateTime(1990, 04, 04), "Madrid", "Queen Cozinha", "Brazil", new DateTime(1996, 9, 11), "Avda. Azteca 123"));
                    order.Add(new OrdersDetails(code + 3, "ANTON", i + 1, 4.3 * i, true, new DateTime(1957, 11, 30), "Cholchester", "Frankenversand", "Germany", new DateTime(1996, 10, 7), "Carrera 52 con Ave. Bolívar #65-98 Llano Largo"));
                    order.Add(new OrdersDetails(code + 4, "BLONP", i + 3, 5.3 * i, false, new DateTime(1930, 10, 22), "Marseille", "Ernst Handel", "Austria", new DateTime(1996, 12, 30), "Magazinweg 7"));
                    order.Add(new OrdersDetails(code + 5, "BOLID", i + 4, 6.3 * i, true, new DateTime(1953, 02, 18), "Tsawassen", "Hanari Carnes", "Switzerland", new DateTime(1997, 12, 3), "1029 - 12th Ave. S."));
                    code += 5;
                }
            }
            return order;
        }

        public int? OrderID { get; set; }
        public string? CustomerID { get; set; }
        public int? EmployeeID { get; set; }
        public double? Freight { get; set; }
        public string? ShipCity { get; set; }
        public bool? Verified { get; set; }
        public DateTime OrderDate { get; set; }
        public string? ShipName { get; set; }
        public string? ShipCountry { get; set; }
        public DateTime ShippedDate { get; set; }
        public string? ShipAddress { get; set; }
    }
}

The following screenshot represents loading data when the button is clicked and CRUD operations are performed:

Ajax

You can find a complete sample for binding data and performing CRUD actions via AJAX requests on GitHub

Display the loading indicator using AJAX.

The Syncfusion^® Grid allows you to display a loading indicator while loading data using AJAX. This feature is useful when there is a delay in loading data from data , and you want to inform the you that the data is being fetched. This is particularly beneficial when working with large datasets or under conditions of slower internet connections.

To display the loading indicator with local data, you need to set the showSpinner property to true. This property controls the visibility of the loading indicator.

The following example demonstrates how to display the loading indicator in the Syncfusion^® Grid using the load and created events:

index.js
let isDataLoading =true

var grid = new ej.grids.Grid({
  allowPaging: true,
  created:created,
  load:load,
  pageSettings: { pageCount: 3,pageSize: 5 },
  columns: [
    { field: 'OrderID', headerText: 'Order ID', textAlign: 'Right', width: 120 },
    { field: 'CustomerName', headerText: 'Customer Name', width: 150 },
    { field: 'OrderDate', headerText: 'Order Date', width: 130, format: 'yMd', textAlign: 'Right' },
    { field: 'Freight', headerText: 'Freight', width: 120, format: 'C2', textAlign: 'Right' },
    { field: 'ShippedDate', headerText: 'Shipped Date', width: 140, format: 'yMd', textAlign: 'Right' },
    { field: 'ShipCountry', headerText: 'Ship Country', width: 150 }
  ],
  height: 315
});
grid.appendTo('#Grid');

function load() {
  if (isDataLoading) {
      grid.showSpinner();
      isDataLoading = false;
  }
}
function created() {
  isDataLoading = true;
  const ajax = new ej2.base.Ajax(
          'https://services.syncfusion.com/angular/production/api/orders',
          'GET'
        );
  ajax.send();
  ajax.onSuccess = (data) => {
      grid.dataSource = JSON.parse(data);
  };
}

Managing spinner visibility during data loading

Showing a spinner during data loading in the Syncfusion^® EJ2 JavaScript Grid enhances the experience by providing a visual indication of the loading progress. This feature helps to understand that data is being fetched or processed.

To show or hide a spinner during data loading in the grid, you can utilize the showSpinner and hideSpinner methods provided by the Grid control.

The following example demonstrates how to show and hide the spinner during data loading using external buttons in a grid:

index.js
index.html
var grid = new ej.grids.Grid({
    height: 272,
    allowPaging: true,
    columns: [
        { field: 'OrderID', headerText: 'Order ID', width: '90', textAlign: 'Right' },
        { field: 'CustomerID', headerText: 'Customer ID', width: '100' },
        { field: 'ProductName', headerText: 'Product Name', width: '110' },
        { field: 'Quantity', headerText: 'Quantity', width: '100' },
    ],
});
grid.appendTo('#Grid');

var loadButton = new ej.buttons.Button({ cssClass: 'e-outline' }, '#LoadButton');
var showButton = new ej.buttons.Button({ cssClass: 'e-outline' }, '#ShowButton');
var hideButton = new ej.buttons.Button({ cssClass: 'e-outline' }, '#HideButton');

document.getElementById('LoadButton').addEventListener('click', function () {  
    grid.showSpinner();
    setTimeout(() => {
      grid.dataSource = data;
      grid.hideSpinner();
    }, 1000);
});

document.getElementById('ShowButton').addEventListener('click', function () {
    grid.showSpinner();
});

document.getElementById('HideButton').addEventListener('click', function () {
    grid.hideSpinner();
});
<!DOCTYPE html><html lang="en"><head>
    <title>EJ2 Grid</title>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta name="description" content="Typescript Grid Control">
    <meta name="author" content="Syncfusion">
    <link href="index.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/29.2.4/ej2-base/styles/bootstrap5.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/29.2.4/ej2-grids/styles/bootstrap5.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/29.2.4/ej2-buttons/styles/bootstrap5.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/29.2.4/ej2-popups/styles/bootstrap5.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/29.2.4/ej2-richtexteditor/styles/bootstrap5.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/29.2.4/ej2-navigations/styles/bootstrap5.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/29.2.4/ej2-dropdowns/styles/bootstrap5.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/29.2.4/ej2-lists/styles/bootstrap5.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/29.2.4/ej2-inputs/styles/bootstrap5.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/29.2.4/ej2-calendars/styles/bootstrap5.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/29.2.4/ej2-notifications/styles/bootstrap5.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/29.2.4/ej2-splitbuttons/styles/bootstrap5.css" rel="stylesheet">
<script src="https://cdn.syncfusion.com/ej2/29.2.4/dist/ej2.min.js" type="text/javascript"></script>
<script src="es5-datasource.js" type="text/javascript"></script>
<script src="https://cdn.syncfusion.com/ej2/syncfusion-helper.js" type ="text/javascript"></script>
</head>
<body> 
    <div id="container">
        <button id="LoadButton" >Load Data</button>
        <button style="margin-left: 20px" id="ShowButton" >Show Spinner</button>
        <button style="margin-left: 20px" id="HideButton" >Hide Spinner</button>
        <div style='margin-top:10px' id="Grid"></div>
    </div>
<script>
var ele = document.getElementById('container');
if(ele) {
  ele.style.visibility = "visible";
}   
</script>
<script src="index.js" type="text/javascript"></script>
</body></html>

Immutable mode 

Immutable mode in the Syncfusion^® Grid is designed to optimize re-rendering performance by utilizing the object reference and deep compare concept. This mode ensures that when performing Grid actions, only the modified or newly added rows are re-rendered, preventing unnecessary re-rendering of unchanged rows.

To enable this feature, you need to set the enableImmutableMode property as true.

If immutable mode is enabled, when the datasource changes, only newly added rows are regenerated or reused. Consequently, the grid’s queryCellInfo and rowDataBound events trigger only for newly generated rows, not for existing rows.

If immutable mode is not enabled, both newly added rows and existing rows are regenerated or reused when the datasource changes. As a result, the rowDataBound and queryCellInfo events trigger for both newly added and existing rows.

This feature uses the primary key value for data comparison. So, you need to provide the isPrimaryKey column.

The following example demonstrates how to enable immutable mode in an EJ2 JavaScript control. When add, delete, or update actions are performed, existing rows are not regenerated or reused, ensuring efficient rendering of only the modified or newly added rows:

index.js
index.html
var grid = new ej.grids.Grid({
    dataSource: data,
    height: 350,
    allowPaging: true,
    enableHover: false,
    enableImmutableMode: true,
    pageSettings: { pageSize: 50 },
    selectionSettings: { type: 'Multiple' },
    queryCellInfo: function (args) {
        if ( args.column.field === 'ShipName' && args.data.ShipName === 'Gems Chevalier') {
            args.cell.style.backgroundColor = 'rgb(210, 226, 129)';
        }
    },
    rowDataBound: function (args) {
        args.row.style.backgroundColor = args.data.isNewlyAdded ? '' : 'rgb(208, 255, 255)';
    },
    columns: [
        { field: 'OrderID', headerText: 'Order ID', isPrimaryKey: true, width: '120', textAlign: 'Right' },
        { field: 'CustomerID', headerText: 'Customer ID', width: '120' },
        { field: 'Freight', headerText: 'Freight', width: '120' },
        { field: 'ShipName', headerText: 'Ship Name', width: '120' },
    ],
});
grid.appendTo('#Grid');

var message = document.getElementById('message');
message.innerHTML = `Initial rows rendered: ${data.length}`;

document.getElementById('addtop').addEventListener('click', function () {  
    grid.getAllDataRows().forEach(row => {
        row.style.backgroundColor = 'rgb(208, 255, 255)';
    });
    var count = 0;
    if (count < 1) {
        var newRowData = [];
        var addedRecords = {
            OrderID: generateOrderId(),
            CustomerID: generateCustomerId(),
            ShipCity: generateShipCity(),
            Freight: generateFreight(),
            ShipName: generateShipName(),
            isNewlyAdded: true,
        };
        newRowData.push(addedRecords);
        grid.dataSource = [...newRowData, ...grid.dataSource];
        count++;
        message.innerHTML = count + ' rows rendered after performing the add action';
    }
});

document.getElementById('delete').addEventListener('click', function () {
    var count = 0;
    if (count < 1 && data.length > 0) {
        grid.dataSource = grid.dataSource.slice(1);
        count++;
        message.innerHTML = count + ' rows deleted after performing delete action';
    }
});

document.getElementById('update').addEventListener('click', function () {
    var count = 0;
    var newRowData = grid.dataSource.map(function (row) {
        if (row.ShipName === 'Bueno Foods') {
            count++;
            return { ...row, ShipName: 'Gems Chevalier' };
        } else {
            return row;
        }
    });
    grid.dataSource = newRowData;
    message.innerHTML = count + ' rows updated after performing update action';
});

function generateOrderId() {
    return Math.floor(10000 + Math.random() * 90000);
}

function generateCustomerId() {
    var characters = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ';
    var result = '';
    for (var i = 0; i < 5; i++) {
        result += characters.charAt(Math.floor(Math.random() * characters.length));
    }
    return result;
}

function generateShipCity() {
    var cities = ['London', 'Paris', 'New York', 'Tokyo', 'Berlin'];
    return cities[Math.floor(Math.random() * cities.length)];
}

function generateFreight() {
    var randomValue = Math.random() * 100;
    return parseFloat(randomValue.toFixed(2));
}

function generateShipName() {
    var names = ['Que Delícia', 'Bueno Foods', 'Island Trading', 'Laughing Bacchus Winecellars'];
    return names[Math.floor(Math.random() * names.length)];
}
<!DOCTYPE html><html lang="en"><head>
    <title>EJ2 Grid</title>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta name="description" content="Typescript Grid Control">
    <meta name="author" content="Syncfusion">
    <link href="index.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/29.2.4/ej2-base/styles/bootstrap5.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/29.2.4/ej2-grids/styles/bootstrap5.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/29.2.4/ej2-buttons/styles/bootstrap5.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/29.2.4/ej2-popups/styles/bootstrap5.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/29.2.4/ej2-richtexteditor/styles/bootstrap5.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/29.2.4/ej2-navigations/styles/bootstrap5.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/29.2.4/ej2-dropdowns/styles/bootstrap5.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/29.2.4/ej2-lists/styles/bootstrap5.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/29.2.4/ej2-inputs/styles/bootstrap5.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/29.2.4/ej2-calendars/styles/bootstrap5.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/29.2.4/ej2-notifications/styles/bootstrap5.css" rel="stylesheet">
    <link href="https://cdn.syncfusion.com/ej2/29.2.4/ej2-splitbuttons/styles/bootstrap5.css" rel="stylesheet">
<script src="https://cdn.syncfusion.com/ej2/29.2.4/dist/ej2.min.js" type="text/javascript"></script>
<script src="es5-datasource.js" type="text/javascript"></script>
<style>
    .message{
        color:red;
        text-align: center;
    }
</style>
<script src="https://cdn.syncfusion.com/ej2/syncfusion-helper.js" type ="text/javascript"></script>
</head>
<body> 
    <div id="container">
        <button id="addtop" class="e-control e-btn e-lib e-info">Add rows Data</button>
        <button style="margin-left: 20px" id="delete" class="e-control e-btn e-lib e-info">Delete rows</button>
        <button style="margin-left: 20px" id="update" class="e-control e-btn e-lib e-info">Update Freight Data</button>
        <div id="message" class="message"> </div>
        <div id="Grid"></div>
    </div>
<script>
var ele = document.getElementById('container');
if(ele) {
  ele.style.visibility = "visible";
}   
</script>
<script src="index.js" type="text/javascript"></script>
</body></html>

Limitations

The following features are not supported in the immutable mode:

Frozen rows and columns
Grouping
Row Template
Detail Template
Hierarchy Grid
Scrolling
Virtual scroll
Infinite scroll
Column reorder
Rows, column spanning
PDF export, Excel export, Print
Column Resize
Drag and drop
Column template
Column chooser
Clipboard
AutoFit
Filtering