Question

I have a simple IMarkupExtension as follows:

public class HelloWorldMarkup : IMarkupExtension<string>
{
    public string ProvideValue(IServiceProvider serviceProvider)
    {
        return "Hello World";
    }
    public override string ToString()
    {
        return "DesignTime Hello World";
    }
}

and my Xaml that uses it like this..

<StackPanel>
    <TextBlock Text="{my:HelloWorldMarkup}" />
    <HyperlinkButton Content="{my:HelloWorldMarkup}" />
</StackPanel>

At runtime, it all works as expected.

At design time however, the Content of the hyperlink shows the design time values (from ToString), but the TextBlock’s Text does not show.

If I leave it like this, my designer will whinge to me for days.. Does anyone have any suggestions on how I can have my Markups display design time data in TextBlock Text?

Many thanks,

Answer 1

try..

<TextBlock DataContext="{my:HelloWorldMarkup}" Text="{Binding}" />