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V24.2

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DxTreeList.IsRowFocused(Int32) Method

Returns whether the row with the specified visible index is focused.

Namespace: DevExpress.Blazor

Assembly: DevExpress.Blazor.v24.2.dll

NuGet Package: DevExpress.Blazor

#Declaration

C#
public bool IsRowFocused(
    int visibleIndex
)

#Parameters

Name Type Description
visibleIndex Int32

The row’s visible index.

#Returns

Type Description
Boolean

true if the row is focused; otherwise, false.

#Remarks

Call the IsRowFocused method to determine whether the row with the specified visible index is focused. The IsDataItemFocused(Object) method allows you to determine whether the row bound to the specified data item is focused.

Note

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

The following code snippet calls the IsRowFocused method in the CustomizeElement event handler to specify a custom background color for the focused row:

@inject EmployeeTaskService EmployeeTaskService

<DxTreeList Data="TreeListData"
            KeyFieldName="Id"
            ParentKeyFieldName="ParentId"
            FocusedRowEnabled="true"
            CustomizeElement="TreeList_CustomizeElement">
    <Columns>
        <DxTreeListDataColumn FieldName="Name" Caption="Task" />
        <DxTreeListDataColumn FieldName="EmployeeName" />
        <DxTreeListDataColumn FieldName="StartDate" />
        <DxTreeListDataColumn FieldName="DueDate" />
    </Columns>
</DxTreeList>

@code {
    List<EmployeeTask> TreeListData { get; set; }

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

    void TreeList_CustomizeElement(TreeListCustomizeElementEventArgs e) {
        if (e.ElementType == TreeListElementType.DataCell) {
            if (e.TreeList.IsRowFocused(e.VisibleIndex)) {
                e.Style = "background-color: red";
            }
        }
    }
}

TreeList Red Focused Row

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

See Also