In winui 3, how to bind to a dependency property of my UserControl, inside a DataTemplate of a contained ItemsControl?

Voyageur Solitaire 1

So I have a UserControl, which contains an ItemsControl. I need the controls defined inside the DataTemplate to bind to a dependency property in my UserControl.

Let's say my UserControl has a dependency property MyProp. I want to do the following in my xaml code...

<UserControl>
  ...
   <ItemsControl>
      <ItemsControl.ItemTemplate>
        <DataTemplate x:DataType="MyType">
           <custom:ControlThatExpectsMyType
              SomeProperty={x:Bind MyProp}>
           </custom:ControlThatExpectsMyType>
        </DataTemplate>
      <ItemsControl.ItemTemplate>
   </ItemsControl>
  ...
</UserControl>

The MyProp dependency property in the above snippet is not part of MyType, but of my UserControl. Both Binding and x:Bind are acceptable solutions, but none of the "old wpf ways" seem to be working in winui 3.

So, what's the proper -expected- way to do it in winui 3?

Jeanine Zhang-MSFT 9,866 Reputation points Microsoft Vendor

2024-09-02T05:42:34.7866667+00:00

You could try to set the x:Name for the UserControl. And then use Binding instead of x:Bind.

You could refer to the thread: https://stackoverflow.com/a/78936520
Jeanine Zhang-MSFT 9,866 Reputation points Microsoft Vendor

2024-09-12T05:30:40.35+00:00

Have you got any updates?

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In winui 3, how to bind to a dependency property of my UserControl, inside a DataTemplate of a contained ItemsControl?

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