TreeList.ShowFilterPopupExcel Event

Allows you to hide specific filter conditions from the Filters tab of the Excel-style Drop-down Filter.

Namespace: DevExpress.XtraTreeList

Assembly: DevExpress.XtraTreeList.v24.1.dll

NuGet Packages: DevExpress.Win.Navigation, DevExpress.Win.TreeList

Declaration

C#

[DXCategory("Behavior")]
public event FilterPopupExcelEventHandler ShowFilterPopupExcel

VB.NET

<DXCategory("Behavior")>
Public Event ShowFilterPopupExcel As FilterPopupExcelEventHandler

Event Data

The ShowFilterPopupExcel event's data class is DevExpress.XtraTreeList.FilterPopupExcelEventArgs.

Remarks

The following code hides Null and Not Null filter conditions:

C#

void treeList1_ShowFilterPopupExcel(object sender, FilterPopupExcelEventArgs e) {
    e.ShowNulls = false;
}

VB.NET

Private Sub treeList1_ShowFilterPopupExcel(ByVal sender As Object, ByVal e As FilterPopupExcelEventArgs)
    e.ShowNulls = False
End Sub

The e.HideFilter method allows you to hide specific conditions.

Instead of the ShowFilterPopupExcel event, you can also use related static properties accessible through the DevExpress.Utils.Filtering.ExcelFilterOptions.Default field. These properties allow you to hide filter conditions for all Tree List controls in the application:

C#

ExcelFilterOptions.Default.ShowNulls = false;

VB.NET

ExcelFilterOptions.Default.ShowNulls = False