Question

I’m trying to apply a style to an adorned element, but I don’t know the correct syntax. Here is what I’ve tried:

    <!-- ValidationRule Based Validitaion Control Template -->     <ControlTemplate x:Key='validationTemplate'>         <DockPanel>             <TextBlock Foreground='Red' FontSize='20'>!</TextBlock>             <AdornedElementPlaceholder Style='textStyleTextBox'/>         </DockPanel>     </ControlTemplate> 

The only problem is that the following line doesn’t work:

            <AdornedElementPlaceholder Style='textStyleTextBox'/> 

Any help would be greatly appreciated.

Thanks,

-Charles

Answer 1

Need to put where the resource is coming from.

<TextBox Style='{StaticResource textStyleTextBox}'/> 

Then define the style in a resource such as the user control resources:

<UserControl.Resources>   <Style TargetType='TextBox' x:Key='textStyleTextBox'>     <Setter Property='Background' Value='Blue'/>   </Style> </UserControl.Resources> 

However I dont believe you want to set the style of the adornedelement within the placeholder. It’s just a placeholder for any control with that template. You should set the style of the adornedelement in the element itself like the example I provided above. If you want to style the control based upon it’s validation then something like this:

<Window.Resources>    <ControlTemplate x:Key='validationTemplate'>        <DockPanel>            <TextBlock Foreground='Yellow' Width='55' FontSize='18'>!</TextBlock>            <AdornedElementPlaceholder/>        </DockPanel>    </ControlTemplate>    <Style x:Key='textBoxInError' TargetType='{x:Type TextBox}'>        <Style.Triggers>            <Trigger Property='Validation.HasError' Value='true'>                <Setter Property='Background' Value='Red'/>                <Setter Property='Foreground' Value='White'/>            </Trigger>        </Style.Triggers>    </Style> </Window.Resources> <StackPanel x:Name='mainPanel'>     <TextBlock>Age:</TextBlock>     <TextBox x:Name='txtAge'              Validation.ErrorTemplate='{DynamicResource validationTemplate}'              Style='{StaticResource textBoxInError}'>          <Binding Path='Age' UpdateSourceTrigger='PropertyChanged' >              <Binding.ValidationRules>                  <ExceptionValidationRule/>              </Binding.ValidationRules>          </Binding>     </TextBox>  </StackPanel>