FilterEditorControl.QueryGroupOperations Event

Allows you to prohibit group operations.

Namespace: DevExpress.Xpf.Core.FilteringUI

Assembly: DevExpress.Xpf.Grid.v23.2.dll

NuGet Package: DevExpress.Wpf.Grid.Core

Declaration

C#

public event EventHandler<QueryGroupOperationsEventArgs> QueryGroupOperations

VB.NET

Public Event QueryGroupOperations As EventHandler(Of QueryGroupOperationsEventArgs)

Event Data

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

Property	Description
AllowAddCondition	Gets or sets whether to allow users to add conditions.
AllowAddCustomExpression	Gets or sets whether to allow users to add custom expressions.
AllowAddGroup	Gets or sets whether to allow users to add a group of conditions.
Filter	Gets the current filter criteria specified in the FilterEditorControl.

Remarks

Run Demo: Filter Editor - Prohibit Group Operations

Use the QueryGroupOperations event to prohibit group operations. The following code sample prohibits users from adding custom expressions:

Xaml

<dxg:TableView x:Name="view">
    <dxg:TableView.FilterEditorTemplate>
        <DataTemplate>
            <dxfui:FilterEditorControl QueryGroupOperations="OnQueryGroupOperations" />
        </DataTemplate>
    </dxg:TableView.FilterEditorTemplate>
</dxg:TableView> 

C#

void OnQueryGroupOperations(object sender, QueryGroupOperationsEventArgs e) {
    e.AllowAddCustomExpression = false;
} 

VB.NET

Private Sub OnQueryGroupOperations(ByVal sender As Object, ByVal e As QueryGroupOperationsEventArgs)
    e.AllowAddCustomExpression = False
End Sub