Skip to main content
All docs
V25.1
  • DxTreeList.IsDataItemSelected(Object) Method

    Returns whether the row that corresponds to the specified data item is selected.

    Namespace: DevExpress.Blazor

    Assembly: DevExpress.Blazor.v25.1.dll

    NuGet Package: DevExpress.Blazor

    Declaration

    public bool IsDataItemSelected(
        object dataItem
    )

    Parameters

    Name Type Description
    dataItem Object

    The data item.

    Returns

    Type Description
    Boolean

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

    Remarks

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

    @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