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Editing in ASP.NET Core Tree Grid control

The TreeGrid component has options to dynamically insert, delete and update records. Editing feature is enabled by using e-treegrid-editSettings tag helper and it requires a primary key column for CRUD operations. To define the primary key, set isPrimaryKey of e-treegrid-column tag helper to true in particular column.

tagHelper

edit.cs

<ejs-treegrid id="TreeGrid" dataSource="@ViewBag.datasource" childMapping="Children" height="270" treeColumnIndex="1">
    <e-treegrid-editSettings allowAdding="true" allowDeleting="true" allowEditing="true" mode="Row"></e-treegrid-editSettings>
    <e-treegrid-columns>
        <e-treegrid-column field="TaskId" headerText="Task ID" isPrimaryKey="true" textAlign="Right" width="90"></e-treegrid-column>
        <e-treegrid-column field="TaskName" headerText="Task Name" width="60"></e-treegrid-column>
        <e-treegrid-column field="Priority" headerText="Priority" width="120"></e-treegrid-column>
        <e-treegrid-column field="Duration" headerText="Duration" textAlign="Right" width="120"></e-treegrid-column>
    </e-treegrid-columns>
</ejs-treegrid>

public IActionResult Index()
{
    var tree = TreeData.GetDefaultData();
    ViewBag.datasource = tree;
    return View();
}

You can disable editing for a particular column, by specifying allowEditing of e-treegrid-column tag helper to false.

The treegrid toolbar has the built-in items to execute Editing actions. You can define this by using the toolbar property.

tagHelper

editTools.cs

<ejs-treegrid id="TreeGrid" dataSource="@ViewBag.datasource" childMapping="Children" height="270" treeColumnIndex="1"  toolbar="@(new List<string>() { "Add", "Edit", "Delete", "Cancel", "Update" })">
    <e-treegrid-editSettings allowAdding="true" allowDeleting="true" allowEditing="true" mode="Cell"></e-treegrid-editSettings>
    <e-treegrid-columns>
        <e-treegrid-column field="TaskId" headerText="Task ID" isPrimaryKey="true" textAlign="Right" width="90"></e-treegrid-column>
        <e-treegrid-column field="TaskName" headerText="Task Name" width="60"></e-treegrid-column>
        <e-treegrid-column field="Priority" headerText="Priority" width="120"></e-treegrid-column>
        <e-treegrid-column field="Duration" headerText="Duration" textAlign="Right" width="120"></e-treegrid-column>
    </e-treegrid-columns>
</ejs-treegrid>

public IActionResult Index()
{
    var tree = TreeData.GetDefaultData();
    ViewBag.datasource = tree;
    return View();
}

Cell edit type and its params

The editType of e-treegrid-column tag helper is used to customize the edit type of the particular column. You can set the editType based on data type of the column.

numericedit - NumericTextBox component for integers, double, and decimal data types.
defaultedit - TextBox component for string data type.
dropdownedit - DropDownList component for list data type.
booleanedit - CheckBox component for boolean data type.
datepickeredit - DatePicker component for date data type.
datetimepickeredit - DateTimePicker component for date time data type.

Also, you can customize model of the editType component through the params in edit property of e-treegrid-column tag helper .

The following table describes cell edit type component and their corresponding edit params of the column.

Component	Example
`NumericTextBox`	params: { decimals: 2, value: 5 }
`TextBox`	-
`DropDownList`	params: { value: ‘Germany’ }
`Checkbox`	params: { checked: true}
`DatePicker`	params: { format:‘dd.MM.yyyy’ }
`DateTimePicker`	params: { value: new Date() }

tagHelper

editType.cs

@{
    var numParams = new { @params = new { format = "n" } };
    var dateParams = new { @params = new { format = "M/d/y hh:mm a" } };
}

<ejs-treegrid id="TreeGrid" dataSource="@ViewBag.datasource" childMapping="Children" load="load" height="270" treeColumnIndex="1" toolbar="@(new List<string>() { "Add", "Edit", "Delete", "Cancel", "Update" })">
    <e-treegrid-editSettings allowAdding="true" allowDeleting="true" allowEditing="true" mode="Row"></e-treegrid-editSettings>
    <e-treegrid-columns>
        <e-treegrid-column field="TaskId" headerText="Task ID" isPrimaryKey="true" textAlign="Right" width="90"></e-treegrid-column>
        <e-treegrid-column field="TaskName" headerText="Task Name" editType="stringedit" width="120"></e-treegrid-column>
        <e-treegrid-column field="StartDate" headerText="Start Date" edit=dateParams editType="datetimepickeredit" textAlign="Right" width="120"></e-treegrid-column>
        <e-treegrid-column field="Approved" headerText="Approved" editType="booleanedit"
            type="boolean" displayAsCheckBox="true" textAlign="Center" width="120"></e-treegrid-column>
        <e-treegrid-column field="Progress" headerText="Progress" edit=numParams editType="numericedit" textAlign="Right" width="80"></e-treegrid-column>
        <e-treegrid-column field="Priority" headerText="Priority" editType="dropdownedit" width="120"></e-treegrid-column>
    </e-treegrid-columns>
</ejs-treegrid>

<script>
    function load(args) {
        this.columns[2].format = { format: 'M/d/y hh:mm a', type: 'dateTime' };
    }
</script>

public IActionResult Index()
{
    var tree = TreeData.GetDefaultData();
    ViewBag.datasource = tree;
    return View();
}

If edit type is not defined in the column, then it will be considered as the stringedit type (Textbox component).

Cell Edit Template

The cell edit template is used to add a custom component for a particular column by invoking the following functions:

create - It is used to create the element at the time of initialization.
write - It is used to create the custom component or assign default value at the time of editing.
read - It is used to read the value from the component at the time of save.
destroy - It is used to destroy the component.

tagHelper

editTemplate.cs

<ejs-treegrid id="TreeGrid" dataSource="@ViewBag.datasource" height="400" childMapping="Children" treeColumnIndex="1" toolbar="@(new List<string>() { "Add", "Edit", "Delete", "Update", "Cancel" })">
    <e-treegrid-editsettings allowAdding="true" allowEditing="true" allowDeleting="true" mode="Cell" newRowPosition="Below"></e-treegrid-editsettings>
    <e-treegrid-columns>
        <e-treegrid-column field="TaskId" headerText="Task ID" isPrimaryKey="true" textAlign="Right" width="100"></e-treegrid-column>
        <e-treegrid-column field="TaskName" headerText="Task Name" editType="stringedit" width="190" edit="@(new { create = "create", read = "read", write = "write", destroy ="destroy" })"></e-treegrid-column>
        <e-treegrid-column field="StartDate" headerText="Start Date" editType="datepickeredit" textAlign="Right" format="yMd" type="date" width="130"></e-treegrid-column>
        <e-treegrid-column field="Duration" headerText="Duration" editType="numericedit" textAlign="Right" width="120"></e-treegrid-column>
    </e-treegrid-columns>
</ejs-treegrid>

<script>
    var autoCompleteObj, elem;
    function create(args) {
        elem = document.createElement('input');
        return elem;
    }
    function read(args) {
        return autoCompleteObj.value;
    }
    function destroy(args) {
        return autoCompleteObj.destroy();
    }
    function write(args) {
        var treeGridObj = document.getElementById("TreeGrid").ej2_instances[0];
        autoCompleteObj = new ej.dropdowns.AutoComplete({
            dataSource: treeGridObj.grid.dataSource,
            fields: { value: 'TaskName' },
            value: args.rowData[args.column.field]
        });
        autoCompleteObj.appendTo(elem);

    }
</script>

public IActionResult Index()
{
    var tree = TreeData.GetDefaultData();
    ViewBag.datasource = tree;
    return View();
}

Edit Modes

TreeGrid supports the following types of edit modes, they are:

Cell
Row
Dialog

Cell

In Cell edit mode, when you double click on a cell, it is changed to edit state. You can change the cell value and save to the data source. To enable Cell edit, set the mode property of e-treegrid-editsettings tag helper as Cell.

tagHelper

editCell.cs

<ejs-treegrid id="TreeGrid" dataSource="@ViewBag.dataSource" height="400" childMapping="Children" treeColumnIndex="1" toolbar="@(new List<string>() { "Add", "Edit", "Delete", "Update", "Cancel" })">
    <e-treegrid-editsettings allowAdding="true" allowEditing="true" allowDeleting="true" mode="Cell"></e-treegrid-editsettings>
    <e-treegrid-columns>
        <e-treegrid-column field="TaskId" headerText="Task ID" isPrimaryKey="true" textAlign="Right" width="100"></e-treegrid-column>
        <e-treegrid-column field="TaskName" headerText="Task Name" editType="stringedit" width="190"></e-treegrid-column>
        <e-treegrid-column field="StartDate" headerText="Start Date" editType="datepickeredit" textAlign="Right" format="yMd" type="date" width="130"></e-treegrid-column>
        <e-treegrid-column field="Duration" headerText="Duration" editType="numericedit" textAlign="Right" width="120"></e-treegrid-column>
    </e-treegrid-columns>
</ejs-treegrid>

public IActionResult Index()
{
    var tree = TreeData.GetDefaultData();
    ViewBag.dataSource = tree;
    return View();
}

Cell edit mode is default mode of editing.

Row

In Row edit mode, when you start editing the currently selected record, the entire row is changed to edit state. You can change the cell values of the row and save edited data to the data source. To enable Row edit, set the mode property of e-treegrid-editsettings tag helper as Row.

tagHelper

editRow.cs

<ejs-treegrid id="TreeGrid" dataSource="@ViewBag.datasource" height="400" childMapping="Children" treeColumnIndex="1" toolbar="@(new List<string>() { "Add", "Edit", "Delete", "Update", "Cancel" })">
    <e-treegrid-editsettings allowAdding="true" allowEditing="true" allowDeleting="true" mode="Row"></e-treegrid-editsettings>
    <e-treegrid-columns>
        <e-treegrid-column field="TaskId" headerText="Task ID" isPrimaryKey="true" textAlign="Right" width="100"></e-treegrid-column>
        <e-treegrid-column field="TaskName" headerText="Task Name" editType="stringedit" width="190"></e-treegrid-column>
        <e-treegrid-column field="StartDate" headerText="Start Date" editType="datepickeredit" textAlign="Right" format="yMd" type="date" width="130"></e-treegrid-column>
        <e-treegrid-column field="Duration" headerText="Duration" editType="numericedit" textAlign="Right" width="120"></e-treegrid-column>
    </e-treegrid-columns>
</ejs-treegrid>

public IActionResult Index()
{
    var tree = TreeData.GetDefaultData();
    ViewBag.datasource = tree;
    return View();
}

Dialog

In Dialog edit mode, when you start editing the currently selected row, data will be shown on a dialog. You can change the cell values and save edited data to the data source. To enable Dialog edit, set the mode property of e-treegrid-editsettings tag helper as Dialog.

tagHelper

editDialog.cs

<ejs-treegrid id="TreeGrid" dataSource="@ViewBag.datasource" height="400" childMapping="Children" treeColumnIndex="1" toolbar="@(new List<string>() { "Add", "Edit", "Delete", "Update", "Cancel" })">
    <e-treegrid-editsettings allowAdding="true" allowEditing="true" allowDeleting="true" mode="Dialog"></e-treegrid-editsettings>
    <e-treegrid-columns>
        <e-treegrid-column field="TaskId" headerText="Task ID" isPrimaryKey="true" textAlign="Right" width="100"></e-treegrid-column>
        <e-treegrid-column field="TaskName" headerText="Task Name" editType="stringedit" width="190"></e-treegrid-column>
        <e-treegrid-column field="StartDate" headerText="Start Date" editType="datepickeredit" textAlign="Right" format="yMd" type="date" width="130"></e-treegrid-column>
        <e-treegrid-column field="Duration" headerText="Duration" editType="numericedit" textAlign="Right" width="120"></e-treegrid-column>
    </e-treegrid-columns>
</ejs-treegrid>

public IActionResult Index()
{
    var tree = TreeData.GetDefaultData();
    ViewBag.datasource = tree;
    return View();
}

Batch

In Batch edit mode, when you double-click on the treegrid cell, the target cell goes into edit state. You can bulk save (added, changed and deleted data in the single request) to data source by clicking on the toolbar’s Update button or by externally invoking the batchSave method. To enable Batch edit, set the EditSettings.mode as Batch.

tagHelper

batchedit.cs

<ejs-treegrid id="TreeGrid" dataSource="ViewBag.dataSource" height="400" idMapping="TaskId" parentIdMapping="ParentId" treeColumnIndex="1" toolbar="@(new List<string>() { "Add", "Delete", "Update", "Cancel" })">
    <e-treegrid-editsettings allowAdding="true" allowEditing="true" allowDeleting="true" mode="Batch" newRowPosition="Below"></e-treegrid-editsettings>
    <e-treegrid-columns>
        <e-treegrid-column field="TaskId" headerText="Task ID" isPrimaryKey="true" validationRules="@(new { required=true, number=true})" textAlign="Right" width="90"></e-treegrid-column>
        <e-treegrid-column field="TaskName" headerText="Task Name" validationRules="@(new { required=true})" editType="stringedit" width="220"></e-treegrid-column>
        <e-treegrid-column field="StartDate" headerText=" Start Date" validationRules="@(new { date=true})" editType="datepickeredit" textAlign="Right" format="yMd" type="date" width="130"></e-treegrid-column>
        <e-treegrid-column field="Duration" headerText="Duration" validationRules="@(new { number = true, min = 0 })" editType="numericedit" textAlign="Right" edit="@(new { @params = new { format = "n" } })" width="100"></e-treegrid-column>
        <e-treegrid-column field="Progress" headerText="Progress" textAlign="Right" width="80" editType="numericedit" validationRules="@(new { number = true, min = 0 })" edit="@(new { @params = new { format = "n" } })"></e-treegrid-column>
        <e-treegrid-column field="Priority" headerText="Priority" width="90" editType="stringedit" validationRules="@(new { required=true})"></e-treegrid-column>
    </e-treegrid-columns>
</ejs-treegrid>

public IActionResult Index()
{
    var tree = TreeData.GetDefaultData();
    ViewBag.dataSource = tree;
    return View();
}

Dialog template

The dialog template editing provides an option to customize the default behavior of dialog editing. Using the dialog template, you can render your own editors by defining the mode as Dialog and template as SCRIPT element ID or HTML string which holds the template.

In some cases, you need to add the new field editors in the dialog which are not present in the column model. In that situation, the dialog template will help you to customize the default edit dialog.

In the following sample, treegrid enabled with dialog template editing.

tagHelper

dialogTemplate.cs

editpartial.cs

editpartialMVC.cs

templateModel.cs

<ejs-treegrid id="TreeGrid" dataSource="@ViewBag.dataSource" height="400" actionComplete="actionComplete" childMapping="Children" treeColumnIndex="1" toolbar="@(new List<string>() { "Add", "Edit", "Delete", "Update", "Cancel" })">
    <e-treegrid-editsettings allowAdding="true" allowEditing="true" allowDeleting="true" mode="Dialog" template="#dialogtemplate"></e-treegrid-editsettings>
    <e-treegrid-columns>
        <e-treegrid-column field="TaskId" headerText="Task ID" isPrimaryKey="true" textAlign="Right" width="100"></e-treegrid-column>
        <e-treegrid-column field="TaskName" headerText="Task Name" editType="stringedit" width="190"></e-treegrid-column>
        <e-treegrid-column field="StartDate" headerText="Start Date" textAlign="Right" format="yMd" type="date" width="130"></e-treegrid-column>
        <e-treegrid-column field="Duration" headerText="Duration" textAlign="Right" width="120"></e-treegrid-column>
    </e-treegrid-columns>
</ejs-treegrid>

<script id='dialogtemplate' type="text/x-template">
    <div id="dialogTemp"></div>
</script>

<script>
    function actionComplete(args) {
        if (args.requestType === 'beginEdit' || args.requestType === 'add') {
            var ajax = new ej.base.Ajax({
                url: "/Home/EditPartial", //render the partial view
                type: "POST",
                contentType: "application/json",
                data: JSON.stringify({ value: args.rowData, isedit: args.requestType === 'beginEdit' })
            });
            ajax.send().then(function (data) {
                $("#dialogTemp").html(data); //Render the edit form with selected record
                args.form.elements.namedItem((args.requestType === 'add' ? 'TaskId' : 'TaskName')).focus();
            }).catch(function (xhr) {
                console.log(xhr);
            });
        }
    }
</script>

public IActionResult Index()
{
    var tree = TreeData.GetDefaultData();
    ViewBag.dataSource = tree;
    return View();
}

public ActionResult Editpartial(TreeData value,bool isedit)
{
    ViewBag.prioritydata = new List<object>() { 
        new { text = "Normal", value= "Normal"},
        new { text = "Critical", value= "Critical"},
        new { text = "Low", value= "Low"},
        new { text = "High", value= "High"},
    };
    return PartialView("editpartial", value);
}

@model TestApplication.Models.TreeData

@*//define the model for store the model values*@

@using Syncfusion.EJ2

<div>
    <div class="form-row">
        <div class="form-group col-md-6">
            <div class="e-float-input e-control-wrapper">
                <input asp-for="TaskId" value=@Model.TaskId.ToString() disabled type='text' name="TaskId" />
                <span class="e-float-line"></span>
                <label asp-for="TaskId" class="e-float-text e-label-top">Task ID</label>
            </div>
        </div>
        <div class="form-group col-md-6">
            <div class="e-float-input e-control-wrapper">
                <input asp-for="TaskName" name="TaskName" value=@Model.TaskName />
                <span class="e-float-line"></span>
                <label asp-for="TaskName" class="e-float-text e-label-top">Task Name</label>
            </div>
        </div>
    </div>

    <div class="form-row">
        <div class="form-group col-md-6">
            <ejs-numerictextbox id="Progress" value=@Model.Progress format="C2" placeholder="Progress" floatLabelType="Always"></ejs-numerictextbox>
        </div>
        <div class="form-group col-md-6">
            <ejs-datepicker id="StartDate" value=@Model.StartDate placeholder="Start Date" floatLabelType="Always"></ejs-datepicker>
        </div>
    </div>

    <div class="form-row">
        <div class="form-group col-md-12">
            <ejs-checkbox checked="@Model.Approved" label="Approved" id="Approved"></ejs-checkbox>
        </div>
    </div>
</div>

<ejs-scripts></ejs-scripts>

@model MVCApplication.Models.TreeGridData
@*//define the model for store the model values*@

@using Syncfusion.EJ2
@using Syncfusion.EJ2.DropDowns

<div>
    <div class="form-row">
        <div class="form-group col-md-6">
            <div class="e-float-input e-control-wrapper">
                <input value=@Model.TaskId name="TaskId" disabled type='text' />
                <span class="e-float-line"></span>
                <label asp-for="TaskId" class="e-float-text e-label-top">Task ID</label>
            </div>
        </div>
        <div class="form-group col-md-6">
            <div class="e-float-input e-control-wrapper">
                <input name="TaskName" value=@Model.TaskName.ToString() />
                <span class="e-float-line"></span>
                <label asp-for="TaskName" class="e-float-text e-label-top">Task Name</label>
            </div>
        </div>
    </div>

    <div class="form-row">
        <div class="form-group col-md-6">
            @Html.EJS().NumericTextBox("Progress").Value(Model.Progress).Format("C2").Placeholder("Progress").Render()
        </div>
        <div class="form-group col-md-6">
            @Html.EJS().DatePicker("StartDate").Value(Model.StartDate).Placeholder("Start Date").Render()
        </div>
    </div>

    <div class="form-row">
        <div class="form-group col-md-12">
            @Html.EJS().CheckBox("Approved").Checked(Model.Approved).Label("Approved").Render()
        </div>
    </div>
</div>

@Html.EJS().ScriptManager()

public class TreeData
    {
        public TreeData() { }

        public int TaskId { get; set; }

        public string TaskName { get; set; }

        public DateTime StartDate { get; set; }

        public DateTime EndDate { get; set; }

        public int Duration { get; set; }

        public int Progress { get; set; }
        public string Priority { get; set; }
        public bool Approved { get; set; }

        public DateTime FilterStartDate { get; set; }
        public DateTime FilterEndDate { get; set; }

        public List<TreeData> Children { get; set; }

        public int? ParentId { get; set; }
    }

The template form editors should have name attribute.

Get value from editor

You can read, format, and update the current editor value in the actionBegin event at the time of setting requestType to save.

In the following code example, the progress value has been formatted and updated.

    function actionBegin(args) {
        if (args.requestType === 'save') {
            // cast string to integer value.
            args.data['progress'] = parseFloat(args.form.querySelector("#progress").value);
        }
    }

Set focus to editor

By default, the first input element in the dialog will be focused while opening the dialog. If the first input element is in disabled or hidden state, focus the valid input element in the actionComplete event based on requestType as beginEdit.

    function actionComplete(args) {
        // Set initail Focus
        if (args.requestType === 'beginEdit') {
            (args.form.elements.namedItem('taskName')as HTMLInputElement).focus();
        }
    }

Adding validation rules for custom editors

If you have used additional fields that are not present in the column model, then add the validation rules to the actionComplete event.

    function actionComplete(args: DialogEditEventArgs) {
        if ((args.requestType === 'beginEdit' || args.requestType === 'add')) {
            // Add Validation Rules
            args.form.ej2_instances[0].addRules('progress', {max: 100});
        }
    }

Adding row position

The TreeGrid control provides the support to add the new row in the top, bottom, above selected row, below selected row and child position of tree grid content using newRowPosition property of e-treegrid-editsettings tag helper. By default, a new row will be added at the top of the treegrid.

The following examples shows how to set new row position as Child in treegrid.

tagHelper

newRow.cs

<ejs-treegrid id="TreeGrid" dataSource="@ViewBag.dataSource" height="400" childMapping="Children"
        treeColumnIndex="1" toolbar="@(new List<string>() { "Add", "Delete", "Update", "Cancel" })">
    <e-treegrid-editsettings allowAdding="true" allowEditing="true" allowDeleting="true" newRowPosition="Child"></e-treegrid-editsettings>
    <e-treegrid-columns>
        <e-treegrid-column field="TaskId" headerText="Task ID" isPrimaryKey="true" textAlign="Right" width="70"></e-treegrid-column>
        <e-treegrid-column field="TaskName" headerText="Task Name" editType="stringedit" width="180"></e-treegrid-column>
        <e-treegrid-column field="StartDate" headerText="Start Date" editType="datetimepickeredit" textAlign="Right" width="185" format="yMd"></e-treegrid-column>
        <e-treegrid-column field="Priority" headerText="Priority" defaultValue='Normal' width="100"></e-treegrid-column>
    </e-treegrid-columns>
</ejs-treegrid>

public IActionResult Index()
{
    var tree = TreeData.GetDefaultData();
    ViewBag.dataSource = tree;
    return View();
}

Command column

The command column provides an option to add CRUD action buttons in a column. This can be defined by the commands property of e-treegrid-column tag helper.

The available built-in command buttons are:

Command Button	Actions
Edit	Edit the current row.
Delete	Delete the current row.
Save	Update the edited row.
Cancel	Cancel the edited state.

tagHelper

commandcolumn.cs

@{ 
    List<object> commands = new List<object>();
    commands.Add(new { type = "Edit", buttonOption = new { iconCss = "e-icons e-edit", cssClass = "e-flat" } });
    commands.Add(new { type = "Delete", buttonOption = new { iconCss = "e-icons e-delete", cssClass = "e-flat" } });
    commands.Add(new { type = "Save", buttonOption = new { iconCss = "e-icons e-update", cssClass = "e-flat" } });
    commands.Add(new { type = "Cancel", buttonOption = new { iconCss = "e-icons e-cancel-icon", cssClass = "e-flat" } });
}

<ejs-treegrid id="TreeGrid" dataSource="@ViewBag.dataSource" height="400" childMapping="Children" treeColumnIndex="1" toolbar="@(new List<string>() { "Add", "Edit", "Delete", "Update", "Cancel" })">
    <e-treegrid-editsettings allowAdding="true" allowEditing="true" allowDeleting="true" mode="Row"></e-treegrid-editsettings>
    <e-treegrid-columns>
        <e-treegrid-column field="TaskId" headerText="Task ID" isPrimaryKey="true" textAlign="Right" width="100"></e-treegrid-column>
        <e-treegrid-column field="TaskName" headerText="Task Name" editType="stringedit" width="190"></e-treegrid-column>
        <e-treegrid-column field="Duration" headerText="Duration" textAlign="Right" width="120"></e-treegrid-column>
        <e-treegrid-column headerText="Manage Records" width="120" commands=commands></e-treegrid-column>
    </e-treegrid-columns>
</ejs-treegrid>

public IActionResult Index()
{
    var tree = TreeData.GetDefaultData();
    ViewBag.dataSource = tree;
    return View();
}

Custom command

The custom command buttons can be added in a column by using the commands property of e-treegrid-column tag helper and the action for the custom buttons can be defined in the Click event of an Button Option.

tagHelper

customcommand.cs

@{
    List<object> commands = new List<object>();
    commands.Add(new { type = "taskstatus", buttonOption = new { content = "Details", cssClass = "e-flat e-details" } }); // custom
}

<script>
    function load() {
            this.columns[3].commands[0].buttonOption.click = function (args) {     //click event for custom command button
            var treegrid = document.getElementById('TreeGrid').ej2_instances[0];  // treegrid instance
            var rowObj= treegrid.grid.getRowObjectFromUID(ej.base.closest(args.target, '.e-row').getAttribute('data-uid'));
            alert(JSON.stringify(rowObj.data));  // display row data
         }
    }
</script>

<ejs-treegrid id="TreeGrid" dataSource="@ViewBag.dataSource" height="400" childMapping="Children" treeColumnIndex="1" toolbar="@(new List<string>() { "Add", "Edit", "Delete", "Update", "Cancel" })" load="load">
    <e-treegrid-editsettings allowAdding="true" allowEditing="true" allowDeleting="true"></e-treegrid-editsettings>
    <e-treegrid-columns>
        <e-treegrid-column field="TaskId" headerText="Task ID" isPrimaryKey="true" textAlign="Right" width="100"></e-treegrid-column>
        <e-treegrid-column field="TaskName" headerText="Task Name" editType="stringedit" width="190"></e-treegrid-column>
        <e-treegrid-column field="Duration" headerText="Duration" textAlign="Right" width="120"></e-treegrid-column>
        <e-treegrid-column headerText="Manage Records" width="120" commands=commands></e-treegrid-column>
    </e-treegrid-columns>
</ejs-treegrid>

public IActionResult Index()
{
    var tree = TreeData.GetDefaultData();
    ViewBag.dataSource = tree;
    return View();
}

Confirmation messages

Delete confirmation

The delete confirm dialog can be shown when deleting a record by defining the showDeleteConfirmDialog as true.

tagHelper

deleteConfirm.cs

<ejs-treegrid id="TreeGrid" dataSource="@ViewBag.dataSource" height="400" childMapping="Children" treeColumnIndex="1" toolbar="@(new List<string>() { "Add", "Edit", "Delete", "Update", "Cancel" })">
    <e-treegrid-editsettings allowAdding="true" allowEditing="true" allowDeleting="true" showDeleteConfirmDialog="true" mode="Cell"></e-treegrid-editsettings>
    <e-treegrid-columns>
        <e-treegrid-column field="TaskId" headerText="Task ID" isPrimaryKey="true" textAlign="Right" width="100"></e-treegrid-column>
        <e-treegrid-column field="TaskName" headerText="Task Name" editType="stringedit" width="190"></e-treegrid-column>
        <e-treegrid-column field="StartDate" headerText="Start Date" editType="datepickeredit" textAlign="Right" format="yMd" type="date" width="130"></e-treegrid-column>
        <e-treegrid-column field="Duration" headerText="Duration" editType="numericedit" textAlign="Right" width="120"></e-treegrid-column>
    </e-treegrid-columns>
</ejs-treegrid>

public IActionResult Index()
{
    var tree = TreeData.GetDefaultData();
    ViewBag.dataSource = tree;
    return View();
}

The showDeleteConfirmDialog supports all type of edit modes.

Column validation

Column validation allows you to validate the edited or added row data and it display errors for invalid fields before saving data. TreeGrid uses Form Validator component for column validation. You can set validation rules by defining the validationRules in e-treegrid-column tag helper.

tagHelper

validationRule.cs

@{
    var dict = new Dictionary<string, object>();
    dict.Add("required", true);
    dict.Add("min", 0);
}

<ejs-treegrid id="TreeGrid" dataSource="@ViewBag.dataSource" height="400" childMapping="Children" treeColumnIndex="1" toolbar="@(new List<string>() { "Add", "Delete", "Update", "Cancel" })">
    <e-treegrid-editsettings allowAdding="true" allowEditing="true" allowDeleting="true"></e-treegrid-editsettings>
    <e-treegrid-columns>
        <e-treegrid-column field="TaskId" headerText="Task ID" isPrimaryKey="true" validationRules="@(new { required=true, number=true})" textAlign="Right" width="70"></e-treegrid-column>
        <e-treegrid-column field="TaskName" headerText="Task Name" validationRules="@(new { required=true})" editType="stringedit" width="180"></e-treegrid-column>
        <e-treegrid-column field="StartDate" headerText="Start Date" validationRules="@(new { date=true})" editType="datetimepickeredit" textAlign="Right" width="185" format="yMd"></e-treegrid-column>
        <e-treegrid-column field="Approved" headerText="Approved" editType="booleanedit" textAlign="Center" width="80" displayAsCheckbox="true" type="boolean"></e-treegrid-column>
        <e-treegrid-column field="Progress" headerText="Progress" validationRules="@(dict)" editType="numericedit" textAlign="Right" width="100"></e-treegrid-column>
        <e-treegrid-column field="Priority" headerText="Priority" editType="dropdownedit" validationRules="@(new { required=true})" width="100"></e-treegrid-column>
    </e-treegrid-columns>
</ejs-treegrid>

public IActionResult Index()
{
    var tree = TreeData.GetDefaultData();
    ViewBag.dataSource = tree;
    return View();
}

Custom validation

You can define your own custom validation rules for the specific columns by using Form Validator custom rules.

In the below demo, custom validation applied for Priority column.

tagHelper

validationRule.cs

@{
    var dict = new Dictionary<string, object>();
    dict.Add("require", true);
}

<ejs-treegrid id="TreeGrid" dataSource="@ViewBag.dataSource" height="400" childMapping="Children" treeColumnIndex="1" toolbar="@(new List<string>() { "Add", "Delete", "Update", "Cancel" })" load="load">
    <e-treegrid-editsettings allowAdding="true" allowEditing="true" allowDeleting="true"></e-treegrid-editsettings>
    <e-treegrid-columns>
        <e-treegrid-column field="TaskId" headerText="Task ID" isPrimaryKey="true" validationRules="@(new { required = true, number = true})" textAlign="Right" width="70"></e-treegrid-column>
        <e-treegrid-column field="TaskName" headerText="Task Name" editType="stringedit" width="180"></e-treegrid-column>
        <e-treegrid-column field="StartDate" headerText="Start Date" validationRules="@(new { date = true})" format="yMd" editType="datetimepickeredit" textAlign="Right" width="185"></e-treegrid-column>
        <e-treegrid-column field="Priority" headerText="Priority" validationRules="@(dict)" width="100"></e-treegrid-column>
    </e-treegrid-columns>
</ejs-treegrid>

<script>
    function load() {
        this.columns[1].validationRules = { required: true, min: [customFn, 'Value should be greater than 5 letters'] }; 
    }

    function customFn(args) {
        return args['value'].length >= 5;
    }
</script>

public IActionResult Index()
{
    var tree = TreeData.GetDefaultData();
    ViewBag.dataSource = tree;
    return View();
}

Persisting data in server

Edited data can be persisted in the database using the RESTful web services.

All the CRUD operations in the treegrid are done through DataManager. The DataManager has an option to bind all the CRUD related data in server-side.

For your information, the ODataAdaptor persists data in the server as per OData protocol.

In the following section, we have explained how to perform CRUD operation in server-side using the UrlAdaptor and RemoteSave Adaptor.

URL adaptor

You can use the UrlAdaptor of DataManager when binding data source from remote data. In the initial load of grid, data are fetched from remote data and bound to the grid using url property of DataManager. You can map The CRUD operation in grid can be mapped to server-side Controller actions using the properties InsertUrl, RemoveUrl, UpdateUrl and BatchUrl.

The following code example describes the above behavior.

tagHelper

urladaptor.cs

<ejs-treegrid id="TreeGrid" dataSource="@ViewBag.datasource" height="400" childMapping="Children" treeColumnIndex="1" toolbar="@(new List<string>() { "Add", "Delete", "Update", "Cancel" })">
    <e-treegrid-editsettings allowAdding="true" allowEditing="true" allowDeleting="true" newRowPosition="Below"></e-treegrid-editsettings>
    <e-treegrid-columns>
        <e-treegrid-column field="TaskId" headerText="Task ID" isPrimaryKey="true" textAlign="Right" width="70"></e-treegrid-column>
        <e-treegrid-column field="TaskName" headerText="Task Name" editType="stringedit" width="180"></e-treegrid-column>
        <e-treegrid-column field="StartDate" headerText="Start Date" editType="datetimepickeredit" format="yMd" textAlign="Right" width="185"></e-treegrid-column>
        <e-treegrid-column field="Priority" headerText="Priority" defaultValue="Normal" width="100"></e-treegrid-column>
    </e-treegrid-columns>
</ejs-treegrid>

public IActionResult DataSource([FromBody]DataManager dm)
{
    var DataSource = TreeData.GetTree();
    var count = DataSource.ToList<TreeData>().Count();
    if (dm.Skip != 0)
    {
        DataSource = operation.PerformSkip(DataSource, dm.Skip);   //Paging
    }
    if (dm.Take != 0)
    {
        DataSource = operation.PerformTake(DataSource, dm.Take);
    }
    return dm.RequiresCounts ? Json(new { result = DataSource, count = count }) : Json(DataSource);
}

Also, when using the UrlAdaptor, you need to return the data as JSON from the controller action and the JSON object must contain a property as result with dataSource as its value and one more property count with the dataSource total records count as its value.

Insert record

Using the InsertUrl property, you can specify the controller action mapping URL to perform insert operation on the server-side.

The following code example describes the above behavior.

tagHelper

insert.cs

<ejs-treegrid id="TreeGrid" dataSource="@ViewBag.datasource" height="400" childMapping="Children" treeColumnIndex="1" toolbar="@(new List<string>() { "Add", "Delete", "Update", "Cancel" })">
    <e-treegrid-editsettings allowAdding="true" allowEditing="true" allowDeleting="true" newRowPosition="Below"></e-treegrid-editsettings>
    <e-treegrid-columns>
        <e-treegrid-column field="TaskId" headerText="Task ID" isPrimaryKey="true" textAlign="Right" width="70"></e-treegrid-column>
        <e-treegrid-column field="TaskName" headerText="Task Name" editType="stringedit" width="180"></e-treegrid-column>
        <e-treegrid-column field="StartDate" headerText="Start Date" editType="datetimepickeredit" format="yMd" textAlign="Right" width="185"></e-treegrid-column>
        <e-treegrid-column field="Priority" headerText="Priority" defaultValue="Normal" width="100"></e-treegrid-column>
    </e-treegrid-columns>
</ejs-treegrid>

public void Insert([FromBody]ICRUDModel value)
{
    var i = 0;
    var index = value.rowIndex;
    for (; i < TreeData.tree.Count; i++)
    {
        if (TreeData.tree[i].TaskID == index)
        {
            break;
        }
    }
    i += FindChildRecords(index);
    TreeData.tree.Insert(i + 1, value.value);
}

public int FindChildRecords(int? id)
{
    var count = 0;
    for (var i = 0; i < TreeData.tree.Count; i++)
    {
        if (TreeData.tree[i].ParentItem == id)
        {
            count++;
            count += FindChildRecords(TreeData.tree[i].TaskID);
        }
    }
    return count;
}

public class CustomBind : TreeData
{
    public TreeData parentItem;
}

public class ICRUDModel
{
    public CustomBind value;
    public int key;
    public string action;
    public int? relationalKey;
}

The newly added record details are bound to the value parameter and relationalKey contains primaryKey value of an selected record helps to find out the position of newly added record. Please refer to the following screenshot.

Insert

Update record

Using the UpdateUrl property, the controller action mapping URL can be specified to perform save/update operation on the server-side.

The following code example describes the previous behavior.

tagHelper

update.cs

<ejs-treegrid id="TreeGrid" dataSource="@ViewBag.datasource" height="400" childMapping="Children" treeColumnIndex="1" toolbar="@(new List<string>() { "Add", "Delete", "Update", "Cancel" })">
    <e-treegrid-editsettings allowAdding="true" allowEditing="true" allowDeleting="true" newRowPosition="Below"></e-treegrid-editsettings>
    <e-treegrid-columns>
        <e-treegrid-column field="TaskId" headerText="Task ID" isPrimaryKey="true" textAlign="Right" width="70"></e-treegrid-column>
        <e-treegrid-column field="TaskName" headerText="Task Name" editType="stringedit" width="180"></e-treegrid-column>
        <e-treegrid-column field="StartDate" headerText="Start Date" editType="datetimepickeredit" format="yMd" textAlign="Right" width="185"></e-treegrid-column>
        <e-treegrid-column field="Priority" headerText="Priority" defaultValue="Normal" width="100"></e-treegrid-column>
    </e-treegrid-columns>
</ejs-treegrid>

public ActionResult Update([FromBody]CRUDModel value)
{
    var val = TreeData.tree.Where(ds => ds.TaskID == value.Value.TaskID).FirstOrDefault();
    val.TaskName = value.Value.TaskName;
    val.StartDate = value.Value.StartDate;
    val.Duration = value.Value.Duration;
    val.Priority = value.Value.Priority;
    val.Progress = value.Value.Progress;
    return Json(val);            
}

public class CRUDModel
{
    public List<TreeData> Added { get; set; }

    public List<TreeData> Changed { get; set; }

    public List<TreeData> Deleted { get; set; }

    public TreeData Value;

    public int Key;

    public int? RelationalKey;
}

The updated record details are bound to the value parameter. Please refer to the following screenshot.

Update

Delete record

Using the RemoveUrl and BatchUrl property, the controller action mapping URL can be specified to perform delete operation on the server-side.

The following code example describes the previous behavior.

tagHelper

delete.cs

<ejs-treegrid id="TreeGrid" dataSource="@ViewBag.datasource" height="400" childMapping="Children" treeColumnIndex="1" toolbar="@(new List<string>() { "Add", "Delete", "Update", "Cancel" })">
    <e-treegrid-editsettings allowAdding="true" allowEditing="true" allowDeleting="true" newRowPosition="Below"></e-treegrid-editsettings>
    <e-treegrid-columns>
        <e-treegrid-column field="TaskId" headerText="Task ID" isPrimaryKey="true" textAlign="Right" width="70"></e-treegrid-column>
        <e-treegrid-column field="TaskName" headerText="Task Name" editType="stringedit" width="180"></e-treegrid-column>
        <e-treegrid-column field="StartDate" headerText="Start Date" editType="datetimepickeredit" format="yMd" textAlign="Right" width="185"></e-treegrid-column>
        <e-treegrid-column field="Priority" headerText="Priority" defaultValue="Normal" width="100"></e-treegrid-column>
    </e-treegrid-columns>
</ejs-treegrid>

public void Remove([FromBody]CRUDModel value)
{
    TreeData.tree.Remove(TreeData.tree.Where(ds => ds.TaskID == int.Parse(value.Key.ToString())).FirstOrDefault());
}

public ActionResult Delete(CRUDModel value)
{
    if (value.Deleted != null) 
    {
       for (var i = 0; i < value.Deleted.Count().Count; i++)
        {
            TreeData.tree.Remove(TreeData.tree.Where(ds => ds.TaskID == value.Deleted[i].TaskID).FirstOrDefault());
        }
    }
}

public class CRUDModel
{
    public List<TreeData> Added { get; set; }

    public List<TreeData> Changed { get; set; }

    public List<TreeData> Deleted { get; set; }

    public TreeData Value;

    public int Key;

    public int? RelationalKey;
}

The deleted record primary key value is bound to the key parameter. Please refer to the following screenshot.

Delete

While delete parent record, the parent and child records is bound to the deleted parameter. Please refer to the following screenshot.

Remote Save Adaptor

You may need to perform all Tree Grid Actions in client-side except the CRUD operations, that should be interacted with server-side to persist data. It can be achieved in TreeGrid by using RemoteSaveAdaptor.

Datasource must be set to json property and set RemoteSaveAdaptor to the adaptor property. CRUD operations can be mapped to server-side using updateUrl, insertUrl, removeUrl and batchUrl properties.

You can use the following code example to use RemoteSaveAdaptor in TreeGrid.

tagHelper

crudcore.cs

<ejs-treegrid id="TreeGrid" hasChildMapping="isParent" idMapping="TaskID" parentIdMapping="parentItem" treeColumnIndex="1" allowPaging="true" toolbar="@(new List<string>() { "Add", "Edit", "Delete", "Update", "Cancel" })">
    <e-data-manager json ="@ViewBag.dataSource" insertUrl="/Home/Insert" updateUrl="/Home/Update" removeUrl="/Home/Remove" batchUrl="/Home/Delete" adaptor="RemoteSaveAdaptor"></e-data-manager>
    <e-treegrid-editsettings allowAdding="true" allowEditing="true" allowDeleting="true" newRowPosition="Below" mode="Row"></e-treegrid-editsettings>
        <e-treegrid-columns>
            <e-treegrid-column field="TaskID" headerText="Task ID" textAlign="Right" width="120"></e-treegrid-column>
            <e-treegrid-column field="TaskName" headerText="Task Name" width="150"></e-treegrid-column>
            <e-treegrid-column field="Duration" headerText="Duration" textAlign="Right" width="110"></e-treegrid-column>
            <e-treegrid-column field="Progress" headerText="Progress" textAlign="Right" width="110"></e-treegrid-column>
        </e-treegrid-columns>
</ejs-treegrid>

public ActionResult Index(DataManager dm)
{
   var data = TreeData.GetTree();
   ViewBag.dataSource = data;
   return View();
}

public ActionResult Insert([FromBody]CRUDModel value)
{
    var i = 0;
    for (; i < TreeData.tree.Count; i++)
    {
        if (TreeData.tree[i].TaskID == value.RelationalKey)
        {
            break;
        }
    }
    i += FindChildRecords(value.RelationalKey);  // Finds Inserted new record index when newRowPosition API is in "Below".
    TreeData.tree.Insert(i + 1, value.Value);
    return Json(value.Value);
}

public int FindChildRecords(int? id)
{
    var count = 0;
    for (var i = 0; i < TreeData.tree.Count; i++)
    {
        if (TreeData.tree[i].ParentID == id)
        {
            count++;
            count += FindChildRecords(TreeData.tree[i].TaskID);
        }
    }
    return count;
}

public ActionResult Update([FromBody]CRUDModel value)
{
    var val = TreeData.tree.Where(ds => ds.TaskID == value.Value.TaskID).FirstOrDefault();
    val.TaskName = value.Value.TaskName;
    val.StartDate = value.Value.StartDate;
    val.Duration = value.Value.Duration;
    val.Priority = value.Value.Priority;
    val.Progress = value.Value.Progress;
    return Json(val);            
}

public void Remove([FromBody]CRUDModel value)
{
    TreeData.tree.Remove(TreeData.tree.Where(ds => ds.TaskID == int.Parse(value.Key.ToString())).FirstOrDefault());
}

public ActionResult Delete([FromBody]CRUDModel value)
{
    if (value.Deleted != null) 
    {
       for (var i = 0; i < value.Deleted.Count().Count; i++)
        {
            TreeData.tree.Remove(TreeData.tree.Where(ds => ds.TaskID == value.Deleted[i].TaskID).FirstOrDefault());
        }
    }
}

public class CRUDModel
{
    public List<TreeData> Added { get; set; }

    public List<TreeData> Changed { get; set; }

    public List<TreeData> Deleted { get; set; }

    public TreeData Value;

    public int Key;

    public int? RelationalKey;
}

Default column values on add new

The treegrid provides an option to set the default value for the columns when adding a new record in it. To set a default value for the particular column by defining the defaultValue in e-treegrid-column tag helper.

tagHelper

defaultvalue.cs

<ejs-treegrid id="TreeGrid" dataSource="@ViewBag.datasource" height="400" childMapping="Children" treeColumnIndex="1" toolbar="@(new List<string>() { "Add", "Delete", "Update", "Cancel" })">
    <e-treegrid-editsettings allowAdding="true" allowEditing="true" allowDeleting="true"></e-treegrid-editsettings>
    <e-treegrid-columns>
        <e-treegrid-column field="TaskId" headerText="Task ID" isPrimaryKey="true" textAlign="Right" width="70"></e-treegrid-column>
        <e-treegrid-column field="TaskName" headerText="Task Name" editType="stringedit" width="180"></e-treegrid-column>
        <e-treegrid-column field="StartDate" headerText="Start Date" editType="datetimepickeredit" format="yMd" textAlign="Right" width="185"></e-treegrid-column>
        <e-treegrid-column field="Priority" headerText="Priority" defaultValue="Normal" width="100"></e-treegrid-column>
    </e-treegrid-columns>
</ejs-treegrid>

public IActionResult Index()
{
    var tree = TreeData.GetDefaultData();
    ViewBag.datasource = tree;
    return View();
}

Disable editing for particular column

You can disable editing for particular columns by using the allowEditing property of e-treegrid-column tag helper.

In the following demo, editing is disabled for the Start Date column.

tagHelper

disable.cs

<ejs-treegrid id="TreeGrid" dataSource="@ViewBag.dataSource" height="400" childMapping="Children" treeColumnIndex="1" toolbar="@(new List<string>() { "Add", "Delete", "Update", "Cancel" })">
    <e-treegrid-editsettings allowAdding="true" allowEditing="true" allowDeleting="true"></e-treegrid-editsettings>
    <e-treegrid-columns>
        <e-treegrid-column field="TaskId" headerText="Task ID" isPrimaryKey="true" textAlign="Right" width="70"></e-treegrid-column>
        <e-treegrid-column field="TaskName" headerText="Task Name" editType="stringedit" width="180"></e-treegrid-column>
        <e-treegrid-column field="StartDate" headerText="Start Date" allowEditing="false" editType="datetimepickeredit" format="yMd" textAlign="Right" width="185"></e-treegrid-column>
        <e-treegrid-column field="Priority" headerText="Priority" width="100"></e-treegrid-column>
    </e-treegrid-columns>
</ejs-treegrid>

public IActionResult Index()
{
    var tree = TreeData.GetDefaultData();
    ViewBag.dataSource = tree;
    return View();
}

Troubleshoot: Editing works only for first row

The Editing functionalities can be performed based upon the primary key value of the selected row. If isPrimaryKey is not defined in the treegrid, then edit or delete action take places the first row.

Please provide additional information

Thank you for your feedback and comments.We will rectify this as soon as possible!

Editing in ASP.NET Core Tree Grid control

Toolbar with edit option

Cell edit type and its params

Cell Edit Template

Edit Modes

Cell

Row

Dialog

Batch

Dialog template

Get value from editor

Set focus to editor

Adding validation rules for custom editors

Adding row position

Command column

Custom command

Confirmation messages

Delete confirmation

Column validation

Custom validation

Persisting data in server

URL adaptor

Insert record

Update record

Delete record

Remote Save Adaptor

Default column values on add new

Disable editing for particular column

Troubleshoot: Editing works only for first row