DxTreeList.DeselectRows(IEnumerable<Int32>) Method
Deselects rows with the specified visible indexes.
Namespace: DevExpress.Blazor
Assembly: DevExpress.Blazor.v24.2.dll
NuGet Package: DevExpress.Blazor
#Declaration
public void DeselectRows(
IEnumerable<int> visibleIndexes
)
#Parameters
Name | Type | Description |
---|---|---|
visible |
IEnumerable<Int32> | Row visible indexes. |
#Remarks
The following methods allow you to manage TreeList selection:
- SelectRow (DeselectRow)
- SelectRows (
DeselectRows
) - SelectDataItem (DeselectDataItem)
- SelectDataItems (DeselectDataItems)
- SelectAllOnPage (DeselectAllOnPage)
- SelectAllAsync (DeselectAllAsync)
- ClearSelection
Pass a collection of row visible indexes to the DeselectRows
method to remove these rows from selection. Call the SelectRows method to select rows with the specified visible indexes.
Note
Rows that are filtered out and child rows of collapsed items do not have visible indexes. You cannot change the selection state of such rows with Deselect
and Select
When the TreeDeselect
method to ensure that the specified data rows are loaded.
To access data items that correspond to selected rows, implement two-way binding for the SelectedDataItems property or handle the SelectedDataItemsChanged event.
Tip
When you call the SelectDeselect
method instead to avoid unnecessary callbacks and redraws.
The following example selects and deselects rows whose indexes are between 3 and 5:
@inject EmployeeTaskService EmployeeTaskService
<style>
.my-button {
width: 200px;
}
</style>
<DxTreeList @ref="MyTreeList"
Data="TreeListData"
KeyFieldName="Id"
ParentKeyFieldName="ParentId"
AllowSelectRowByClick="true"
@bind-SelectedDataItems="@SelectedDataItems">
<Columns>
<DxTreeListDataColumn FieldName="Name" Caption="Task" />
<DxTreeListDataColumn FieldName="EmployeeName" />
<DxTreeListDataColumn FieldName="StartDate" />
<DxTreeListDataColumn FieldName="DueDate" />
</Columns>
</DxTreeList>
<DxButton Click="() => MyTreeList.SelectRows(RowIndexes)" CssClass="my-button" Text="Select Rows 4-6"/>
<DxButton Click="() => MyTreeList.DeselectRows(RowIndexes)" CssClass="my-button" Text="Deselect Rows 4-6"/>
@code {
List<EmployeeTask> TreeListData { get; set; }
IReadOnlyList<object> SelectedDataItems { get; set; }
ITreeList MyTreeList { get; set; }
int[] RowIndexes { get; set; } = new int[] { 3, 4, 5 };
protected override void OnInitialized() {
TreeListData = EmployeeTaskService.GenerateData();
}
}
For more information about selection in the TreeList component, refer to the following topic: Selection and Focus in Blazor TreeList.