FilterEditorControl.QueryGroupTypes Event

Allows you to prohibit group types.

Namespace: DevExpress.Xpf.Core.FilteringUI

Assembly: DevExpress.Xpf.Grid.v19.2.dll

Declaration

C#

public event EventHandler<QueryGroupTypesEventArgs> QueryGroupTypes

VB.NET

Public Event QueryGroupTypes As EventHandler(Of QueryGroupTypesEventArgs)

Event Data

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

Property	Description
AllowAnd	Gets or sets whether to allow users to specify the And logical operator in the FilterEditorControl.
AllowNotAnd	Gets or sets whether to allow users to specify the NotAnd logical operator in the FilterEditorControl.
AllowNotOr	Gets or sets whether to allow users to specify the NotOr logical operator in the FilterEditorControl.
AllowOr	Gets or sets whether to allow users to specify the Or logical operator in the FilterEditorControl.
Filter	Gets the current filter criteria specified in the FilterEditorControl.

Remarks

Tip

Demo: Filter Editor - Prohibit Group Types

Requires installation of WPF Subscription. Download

Use QueryGroupTypes event to prohibit group types. The following code sample prohibits users from specifying the Or and NotOr logical operators:

Xaml

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

C#

void OnQueryGroupTypes(object sender, QueryGroupTypesEventArgs e) {
    e.AllowNotAnd = false;
    e.AllowNotOr = false;
} 

VB.NET

Private Sub OnQueryGroupTypes(ByVal sender As Object, ByVal e As QueryGroupTypesEventArgs)
    e.AllowNotAnd = False
    e.AllowNotOr = False
End Sub