TreeList.ShowFilterPopupExcel Event

Allows you to hide specific filtering conditions from the “Filters” tab of the Excel-style Filter Dropdown.

Namespace: DevExpress.XtraTreeList

Assembly: DevExpress.XtraTreeList.v21.1.dll

Declaration

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

Event Data

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

Remarks

The following code illustrates how to hide the “Null” and “Not Null” filtering conditions.

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

Instead of handling the ShowFilterPopupExcel event, you can also use related static properties accessible through the DevExpress.Utils.Filtering.ExcelFilterOptions.Default field. By doing so, you can hide specific filtering conditions for all Tree Lists at once.

ExcelFilterOptions.Default.ShowNulls = false;

This API affects Excel-styled filter dropdown menus only. To enable these menus, set the TreeListOptionsColumnFilter.FilterPopupMode to FilterPopupMode.Excel.

See Also