I'm trying to apply a style to a combo box but instead of getting applied the combo box itself disappears. Please check the following xaml code for user control.
<UserControl xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:Microsoft_Windows_Themes="clr-namespace:Microsoft.Windows.Themes;assembly=PresentationFramework.Luna" x:Class="Guardian.PAS.PASFramework.UI.WPF.PASComboBox" xmlns:local="clr-namespace:Guardian.PAS.PASFramework.UI.WPF" Height="26" Width="100" VerticalAlignment="Center" > <UserControl.Resources> <Style x:Key="comboBoxStyle" TargetType="{x:Type local:PASCustomComboBox}"> <Setter Property="Template"> <Setter.Value> <ControlTemplate TargetType="{x:Type local:PASCustomComboBox}"> <ControlTemplate.Triggers> <Trigger Property="local:PASCustomComboBox.IsEnabled" Value="false"> <Setter Property="Background" Value="Red"/> </Trigger> </ControlTemplate.Triggers> </ControlTemplate> </Setter.Value> </Setter> </Style> </UserControl.Resources> <Canvas Name="canvas" Height="23" Width="Auto" VerticalAlignment="Center"> <Label Height="23" Name="lblCaption" Width="20" VerticalAlignment="Center">aaa</Label> <local:PASCustomComboBox Height="23" x:Name="cmbComboBoxControl" VerticalAlignment="Center" Width="50" IsEditable="True" Style="{StaticResource comboBoxStyle}"> </local:PASCustomComboBox> <Button Height="23" Name="btnSearch" Width="25" Click="btnSearch_Click" Visibility="Collapsed" VerticalAlignment="Center">...</Button> <Label Height="23" Name="lblDescription" VerticalAlignment="Center" Width="20" Foreground="Blue"> </Label> </Canvas> </UserControl> Here PASCustomComboBox is a class which inherites from combo box.
public class PASCustomComboBox : ComboBox { protected override void OnPreviewKeyDown(KeyEventArgs e) { if (e.Key == Key.Down || e.Key == Key.Up) { e.Handled = true; return; } base.OnPreviewKeyDown(e); } } 
