FilterEditorControl.QueryConditionOperations Event

Allows you to prohibit users from removing conditions.

Namespace: DevExpress.Xpf.Core.FilteringUI

Assembly: DevExpress.Xpf.Grid.v20.2.dll

NuGet Packages: DevExpress.WindowsDesktop.Wpf.Grid.Core, DevExpress.Wpf.Grid.Core

Declaration

C#

public event EventHandler<QueryConditionOperationsEventArgs> QueryConditionOperations

VB.NET

Public Event QueryConditionOperations As EventHandler(Of QueryConditionOperationsEventArgs)

Event Data

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

Property	Description
AllowRemoveCondition	Gets or sets whether to allow users to remove conditions.
FieldName	Gets a name of the field.
Filter	Gets the current filter criteria specified in the FilterEditorControl.

Remarks

Run Demo: Filter Editor - Prohibit Condition Operations

Use the QueryConditionOperations event to prohibit users from removing conditions:

Xaml

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

C#

void OnQueryConditionOperations(object sender, QueryConditionOperationsEventArgs e) {
    e.AllowRemoveCondition = false;
} 

VB.NET

Private Sub OnQueryConditionOperations(ByVal sender As Object, ByVal e As QueryConditionOperationsEventArgs)
    e.AllowRemoveCondition = False
End Sub