Problem with derived ControlTemplates in WPF
- by Frank Fella
The following xaml code works:
<Window x:Class="DerivedTemplateBug.Window1"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:local="clr-namespace:DerivedTemplateBug"
Title="Window1" Height="300" Width="300">
<Button>
<Button.Template>
<ControlTemplate>
<Border BorderBrush="Black" BorderThickness="2">
<TextBlock>Testing!</TextBlock>
</Border>
</ControlTemplate>
</Button.Template>
</Button>
</Window>
Now, if you define the following data template:
using System.Windows.Controls;
namespace DerivedTemplateBug
{
public class DerivedTemplate : ControlTemplate
{
}
}
And then swap the ControlTemplate for the derived class:
<Window x:Class="DerivedTemplateBug.Window1"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:local="clr-namespace:DerivedTemplateBug"
Title="Window1" Height="300" Width="300">
<Button>
<Button.Template>
<local:DerivedTemplate>
<Border BorderBrush="Black" BorderThickness="2">
<TextBlock>Testing!</TextBlock>
</Border>
</local:DerivedTemplate>
</Button.Template>
</Button>
</Window>
You get the following error:
Invalid ContentPropertyAttribute on type 'DerivedTemplateBug.DerivedTemplate', property 'Content' not found.
Can anyone tell me why this is the case?
