TreeListRowClickEventArgs Class
Contains data for RowClick and RowDoubleClick events.
Namespace: DevExpress.Blazor
Assembly: DevExpress.Blazor.v24.1.dll
NuGet Package: DevExpress.Blazor
Declaration
public class TreeListRowClickEventArgs :
GridRowClickEventArgsBaseRemarks
Handle RowClick and RowDoubleClick events to respond to row clicks. Use TreeListRowClickEventArgs event arguments (Column, VisibleIndex, and so on) to access a clicked row and other TreeList data.
The following example expands/collapses a row once a user double-clicks the row or focuses it and presses Enter:
@inject EmployeeTaskService EmployeeTaskService
<DxTreeList Data="TreeListData"
KeyFieldName="Id"
ParentKeyFieldName="ParentId"
RowClick="OnRowClick"
RowDoubleClick="OnRowDoubleClick">
<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 OnRowDoubleClick(TreeListRowClickEventArgs e) {
if (e.TreeList.IsRowExpanded(e.VisibleIndex))
e.TreeList.CollapseRow(e.VisibleIndex);
else
e.TreeList.ExpandRow(e.VisibleIndex);
}
void OnRowClick(TreeListRowClickEventArgs e) {
if (e.InputDevice == InputDevice.Keyboard)
if (e.TreeList.IsRowExpanded(e.VisibleIndex))
e.TreeList.CollapseRow(e.VisibleIndex);
else
e.TreeList.ExpandRow(e.VisibleIndex);
}
}
Enable the AllowSelectRowByClick property to allow users to select and deselect rows by mouse clicks, tap gestures, and keyboard shortcuts. To select a range of rows, users should hold down the Shift key and click the first and last rows in the range. To add/remove a row to/from selection, users should hold down the Ctrl key and click the row.
<DxTreeList Data="TreeListData"
KeyFieldName="Id"
ParentKeyFieldName="ParentId"
RowClick="OnRowClick"
AllowSelectRowByClick="true">
@*...*@
</DxTreeList>
You can use TreeListRowClickEventArgs.ShiftKey and TreeListRowClickEventArgs.CtrlKey event arguments to define whether the Shift or Ctrl key was pressed when a user clicked rows.