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DataViewBase.ShowFilterPopup Event

Allows you to customize a column’s drop-down filter.

Namespace: DevExpress.Xpf.Grid

Assembly: DevExpress.Xpf.Grid.v22.2.Core.dll

NuGet Package: DevExpress.Wpf.Grid.Core


public event FilterPopupEventHandler ShowFilterPopup

Event Data

The ShowFilterPopup event's data class is FilterPopupEventArgs. The following properties provide information specific to this event:

Property Description
Column Provides access to a grid column whose values should be filtered.
ComboBoxEdit Gets the filter dropdown.
ExcelColumnFilterSettings Provides access to the settings of the Excel-style filter.
Handled Gets or sets a value that indicates the present state of the event handling for a routed event as it travels the route. Inherited from RoutedEventArgs.
OriginalSource Gets the original reporting source as determined by pure hit testing, before any possible Source adjustment by a parent class. Inherited from RoutedEventArgs.
PopupBaseEdit Gets the filter pop-up.
RoutedEvent Gets or sets the RoutedEvent associated with this RoutedEventArgs instance. Inherited from RoutedEventArgs.
Source Gets the View that raised the event.

The event data class exposes the following methods:

Method Description
InvokeEventHandler(Delegate, Object) When overridden in a derived class, provides a way to invoke event handlers in a type-specific way, which can increase efficiency over the base implementation. Inherited from RoutedEventArgs.
OnSetSource(Object) When overridden in a derived class, provides a notification callback entry point whenever the value of the Source property of an instance changes. Inherited from RoutedEventArgs.


The GridControl raises the ShowFilterPopup event before a column’s drop-down filter is shown. In the event handler, you can delete existing items, change the filter popup’s minimum width and height, add new items with custom captions and filter values, and so on.

The event’s parameter FilterPopupEventArgs.ComboBoxEdit returns null if the ColumnBase.FilterPopupMode property is not set to List or CheckedList.


This example shows how to replace the Registration Date column’s drop-down filter items with the following items:

  • (All) - Clears the column filter.
  • Registered in 2008 - Shows users registered in 2008.
  • Registered in 2009 - Shows users registered in 2009.


View Example: How to customize filter items within a column's Filter Dropdown

<dxg:GridControl x:Name="grid">
    <dxg:GridColumn FieldName="UserName"/>
    <dxg:GridColumn FieldName="RegistrationDate" FilterPopupMode="List"/>
        <dxg:TableView AutoWidth="True" ShowFilterPopup="TableView_ShowFilterPopup"/>
void TableView_ShowFilterPopup(object sender, FilterPopupEventArgs e) {
    if (e.Column.FieldName != "RegistrationDate")
    List<object> filterItems = new List<object>();
    filterItems.Add(new CustomComboBoxItem() {
        DisplayValue = "(All)",
        EditValue = new CustomComboBoxItem()
    filterItems.Add(new CustomComboBoxItem() {
        DisplayValue = "Registered in 2008",
        EditValue = CriteriaOperator.Parse(string.Format(
        "[RegistrationDate] >= #{0}# AND [RegistrationDate] < #{1}#",
        new DateTime(2008, 1, 1), new DateTime(2009, 1, 1)))
    filterItems.Add(new CustomComboBoxItem() {
        DisplayValue = "Registered in 2009",
        EditValue = CriteriaOperator.Parse(string.Format(
        "[RegistrationDate] >= #{0}# AND [RegistrationDate] < #{1}#",
        new DateTime(2009, 1, 1), new DateTime(2010, 1, 1)))
    e.ComboBoxEdit.ItemsSource = filterItems;

The following code snippets (auto-collected from DevExpress Examples) contain references to the ShowFilterPopup event.


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See Also