- Local Data
- Remote Data
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Data Binding in ASP.NET CORE List Box Control
22 Dec 20228 minutes to read
The ListBox loads the data either from local data sources or remote data services using the dataSource
property. It supports the data type of array
or DataManager
.
Fields | Type | Description |
---|---|---|
text |
string |
Specifies the display text of each list item. |
value |
string |
Specifies the hidden data value mapped to each list item that should contain a unique value. |
groupBy |
string |
Specifies the category under which the list item has to be grouped. |
iconCss |
string |
Specifies the iconCss class that needs to be mapped. |
htmlAttributes |
string |
Allows additional attributes to configure the elements in various ways to meet the criteria. |
NOTE
When binding complex data to the ListBox, fields should be mapped correctly. Otherwise, the selected item remains undefined.
Local Data
Local data can be represented by the following ways as described below.
Array of string
The ListBox has support to load array of primitive data such as strings or numbers. Here, both value and text field acts as same.
<ejs-listbox id="listbox" dataSource="@ViewBag.data" >
</ejs-listbox>
using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Mvc;
using WebApplication1.Models;
namespace WebApplication1.Controllers
{
public class ListBoxController : Controller
{
public IActionResult databinding()
{
ViewBag.data = new string[] { "BadmHennessey Venominton", "Bugatti Chiron", "Bugatti Veyron Super Sport", "SSC Ultimate Aero", "Koenigsegg CCR", "McLaren F1", "Aston Martin One- 77", "Jaguar XJ220" };
return View();
}
}
}
Array of object
The ListBox can generate its list items through an array of object data. For this, the appropriate columns should be mapped to the fields
property.
In the following example, id
and sports
column from complex data have been mapped to the value
field and text
field, respectively.
<ejs-listbox id="listbox" dataSource="@ViewBag.data" >
</ejs-listbox>
using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Mvc;
using WebApplication1.Models;
namespace WebApplication1.Controllers
{
public class ListBoxController : Controller
{
public IActionResult databinding()
{
List<object> Data = new List<object> {
new { text = "Hennessey Venom", id = "list-01" },
new { text = "Bugatti Chiron", id = "list-02" },
new { text = "Bugatti Veyron Super Sport", id = "list-03" },
new { text = "SSC Ultimate Aero", id = "list-04" },
new { text = "Koenigsegg CCR", id = "list-05" },
new { text = "McLaren F1", id = "list-06" },
new { text = "Aston Martin One- 77", id = "list-07" },
new { text = "Jaguar XJ220", id = "list-08" }
ViewBag.data = Data;
return View();
}
}
}
Array of complex object
The ListBox can generate its list items through an array of complex data. For this, the appropriate columns should be mapped to the fields
property.
In the following example, Sports.Name
column from complex data have been mapped to the text
field.
<ejs-listbox id="listbox" dataSource="@ViewBag.data" >
<e-listbox-fields text="sports.Name"></e-listbox-fields>
</ejs-listbox>
using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Mvc;
using WebApplication1.Models;
namespace WebApplication1.Controllers
{
public class ListBoxController : Controller
{
public IActionResult databinding()
{
List<object> Data = new List<object>
{
new { id = "game0", sports = new {Name = "Badminton" } },
new { id = "game1", sports = new {Name = "Cricket" } },
new { id = "game2", sports = new {Name = "Football" } },
new { id = "game3", sports = new {Name = "Golf" } },
new { id = "game4", sports = new {Name = "Tennis" } },
new { id = "game5", sports = new {Name = "Basket Ball" } },
new { id = "game6", sports = new {Name = "Base Ball" } },
new { id = "game7", sports = new {Name = "Hockey" } }
};
ViewBag.data = Data;
return View();
}
}
}
Remote Data
The ListBox supports retrieval of data from remote data services with the help of DataManager
component. The query
property is used to fetch data from the database and bind it to the ListBox.
The following sample displays the employee names from Employee table.
<ejs-listbox id="listbox">
<e-listbox-fields text="FirstName" value="EmployeeID"></e-listbox-fields>
<e-data-manager url="https://services.syncfusion.com/aspnet/production/api/Employees" adaptor="ODataAdaptor" crossDomain="true"></e-data-manager>
</ejs-listbox>
using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Mvc;
using WebApplication1.Models;
namespace WebApplication1.Controllers
{
public class ListBoxController : Controller
{
public IActionResult databinding()
{
return View();
}
}
}