Combo box inside a user control disappears when style is applied

[dashingsidds]

Hi, I am 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)
        {

[Ian Shlasko]

When you set the Template property for a control, you're replacing the control with whatever is inside the template... In this case, you're replacing it with nothing, since the only thing you put inside your custom template is a trigger.

Proud to have finally moved to the A-Ark. Which one are you in?
Author of the Guardians Saga (Sci-Fi/Fantasy novels)

[dashingsidds]

Oh... Then what should i write in the control template to show the current combo box as it is??? I am a little weak in xaml..!! :)

[Ian Shlasko]

Don't use the Template unless you plan on replacing the entire control.

Proud to have finally moved to the A-Ark. Which one are you in?
Author of the Guardians Saga (Sci-Fi/Fantasy novels)