Hide the Match Case option of the Filtering control

By default, the filtering control shows the Match Case option when the type of the data is string. This article shows how to hide this option (as some languages does not have a difference between lower and upper case letters).

This cannot be done by simply adding the XAML of the control template, because the proper filter editor is added in runtime depending on the type of the column.

So, we need to use some events and code behind:

1. Subscribe to the FieldFilterEditorCreated event of RadGridView. First approach (after Q3 2011)

Since Q3 2011 version of Telerik UI for WPF, a new property MatchCaseVisibility had been added to the StringFilterEditor. So you could change its value directly.

1. In its event handler check if the editor is of type StringFilterEditor and if so - set the MatchCaseVisibility to Visibility.Hidden.

Here is the full code

• C#
• VB.NET

private void gridView_FieldFilterEditorCreated2(object sender, Telerik.Windows.Controls.GridView.EditorCreatedEventArgs e) 
{ 
    //get the StringFilterEditor in your RadGridView 
    var stringFilterEditor = e.Editor as StringFilterEditor; 
    if (stringFilterEditor != null) 
    { 
        stringFilterEditor.MatchCaseVisibility = Visibility.Hidden; 
    } 
} 

Private Sub gridView_FieldFilterEditorCreated2(sender As Object, e As Telerik.Windows.Controls.GridView.EditorCreatedEventArgs) 
    'get the StringFilterEditor in your RadGridView 
    Dim stringFilterEditor = TryCast(e.Editor, StringFilterEditor) 
    If stringFilterEditor IsNot Nothing Then 
        stringFilterEditor.MatchCaseVisibility = Visibility.Hidden 
    End If 
End Sub 

Second approach (before Q3 2011)

1. In its event handler check if the editor is of type StringFilterEditor and if so - find the match case toggle button and collapse it.

Here is the full code:

• C#
• VB.NET

private void gridView_FieldFilterEditorCreated(object sender, Telerik.Windows.Controls.GridView.EditorCreatedEventArgs e) 
{ 
    //get the StringFilterEditor in your RadGridView 
    var stringFilterEditor = e.Editor as StringFilterEditor; 
    if (stringFilterEditor != null) 
    { 
        stringFilterEditor.Loaded += new RoutedEventHandler(stringFilterEditor_Loaded); 
    } 
} 
 
private void stringFilterEditor_Loaded(object sender, RoutedEventArgs e) 
{ 
    //Hide the Match case toogle button in its Loaded event 
    ((StringFilterEditor)sender).ChildrenOfType<ToggleButton>().FirstOrDefault().Visibility = Visibility.Collapsed; 
} 

Private Sub gridView_FieldFilterEditorCreated(sender As Object, e As Telerik.Windows.Controls.GridView.EditorCreatedEventArgs) 
    'get the StringFilterEditor in your RadGridView 
    Dim stringFilterEditor = TryCast(e.Editor, StringFilterEditor) 
    If stringFilterEditor IsNot Nothing Then 
        AddHandler stringFilterEditor.Loaded, AddressOf stringFilterEditor_Loaded 
    End If 
End Sub 
 
Private Sub stringFilterEditor_Loaded(sender As Object, e As RoutedEventArgs) 
    'Hide the Match case toogle button in its Loaded event 
    DirectCast(sender, StringFilterEditor).ChildrenOfType(Of ToggleButton)().FirstOrDefault().Visibility = Visibility.Collapsed 
End Sub