Question

I have the following Problem: I create a custom control which inherits from an already existing one, i.e.

public class CustomButton : Button
{
    public Boolean AdditionalProperty { get; set; }
}

This works without problem, but if I try to Style the element it doesn’t apply the style

<style TargetType="local:CustomButton">
    <!-- Setters -->
</style>

What am I doing wrong? I add the CustomButton programmatically, is this the problem? I tried the following as well:

CustomButton customButton = new CustomButton();
customButton.Style = FindResource("<key>");
someGrid.Children.Add(customButton);

Answer 1

Try TargetType="{x:Type local:CustomButton}"

Edit:

WPF supports techniques that enable
specifying the value of some
properties of type Type without
requiring an x:Type markup extension
usage. Instead, you can specify the
value as a string that names the type.
Examples of this are
ControlTemplate.TargetType and
Style.TargetType. Support for this
behavior is not provided through
either type converters or markup
extensions. Instead, this is a
deferral behavior implemented through
FrameworkElementFactory.

Source: MSDN