Add DataBinding for attached Property per Code Behind

c# data-binding code-behind attached-properties
Taladan picture Taladan · Mar 1, 2009 · Viewed 11.5k times · Source

I want to add a DataBinding per Codebehind for an attached Property and want to show the Canvas.Left property in a TextBox. How do I add this property?

Answer

ageektrapped picture ageektrapped · Mar 1, 2009

It's somewhat unclear from your question, but I think you're asking how one would bind to the attached property Canvas.Left and show it in a TextBox. I'll assume you want it for a control other than the TextBox.

<Canvas>
   <TextBox x:Name="textBox" Text="{Binding ElementName=button, Path=(Canvas.Left)}" />
   <Button x:Name="button" Content="Press me" />
</Canvas>

Note the brackets around the attached property.

EDIT: To do the equivalent in code, use the following:

Binding binding = new Binding();
binding.Source = button;
binding.Path = new PropertyPath(Canvas.LeftProperty);
textBox.SetBinding(TextBlock.TextProperty, binding);

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