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V24.2

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DxTreeList.IsRowSelected(Int32) Method

Returns whether the specified row is selected.

Namespace: DevExpress.Blazor

Assembly: DevExpress.Blazor.v24.2.dll

NuGet Package: DevExpress.Blazor

#Declaration

C#
public bool IsRowSelected(
    int visibleIndex
)

#Parameters

Name Type Description
visibleIndex Int32

The row’s visible index.

#Returns

Type Description
Boolean

true if the specified row is selected; otherwise, false.

#Remarks

Call the IsRowSelected method to identify whether the specified TreeList row is selected. The IsDataItemSelected method allows you to check whether the row that corresponds to the specified data item is selected.

Note

When the TreeList is bound to the GridDevExtremeDataSource or loads data on demand, call the WaitForRemoteSourceRowLoadAsync(Int32) method before you execute the IsRowSelected method to ensure that the specified data row is loaded.

@inject EmployeeTaskService EmployeeTaskService

<style>
    .my-button {
        width: 200px;
    }
</style>

<DxTreeList @ref="MyTreeList"
            Data="TreeListData"
            KeyFieldName="Id"
            ParentKeyFieldName="ParentId"
            @bind-SelectedDataItems="@SelectedDataItems">
    <Columns>
        <DxTreeListSelectionColumn />
        <DxTreeListDataColumn FieldName="Name" Caption="Task" />
        <DxTreeListDataColumn FieldName="EmployeeName" />
        <DxTreeListDataColumn FieldName="StartDate" />
        <DxTreeListDataColumn FieldName="DueDate" />
    </Columns>
</DxTreeList>
<DxButton Text="Is First Row Selected" CssClass="my-button"
          Click="() => IsRowSelectedInfo = MyTreeList.IsRowSelected(0)" />
<DxButton Text="Is First Data Item Selected" CssClass="my-button"
          Click="() => IsDataItemSelectedInfo = MyTreeList.IsDataItemSelected(TreeListData.First())" />

<div><b>Is First Row Selected</b>: @IsRowSelectedInfo</div>
<div><b>Is First Data Item Selected</b>: @IsDataItemSelectedInfo</div>

@code {
    List<EmployeeTask> TreeListData { get; set; }
    IReadOnlyList<object> SelectedDataItems { get; set; }
    ITreeList MyTreeList { get; set; }
    bool IsRowSelectedInfo { get; set; }
    bool IsDataItemSelectedInfo { get; set; }

    protected override void OnInitialized() {
        TreeListData = EmployeeTaskService.GenerateData();
    }
}

Blazor TreeList Selection

For more information about selection in the TreeList component, refer to the following topic: Selection and Focus in Blazor TreeList.

See Also