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Binding AutoCompleteBox inside DataTemplate

I have the following AutoCompleteBox defined inside a DataTemplate:

<Window.Resources>
  <DataTemplate x:key="PaneTitleTemplate">
    <Grid>
      <Grid.ColumnDefinitions>
        <ColumnDefinition />
        <ColumnDefinition />
      </Grid.ColumnDefinition>
      <ContentPresenter Content="{Binding}" />
      <toolkit:AutoCompleteBox x:Name="InsertBox" ItemsSource="{???}" />
    </Grid>
  </DataTemplate>
</Window.Resources>
...
<radRock:RadPane x:Name="pane1" TitleTemplate="{StaticResource PaneTitleTemplate}"/>

Now I would like to fill it with a list of strings, but I don't know which binding to use. The string list is an instance variable from the window. What should I do?

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Part of the question is your DataContext. If it is the window itself or if it is some other object. If it is a window, you do not need to specify it in the binding, if it is some other object, then you must specify that you are using the window as the binding source. I think you want to use binging (you can remove ElementName if Window is DataContext):

ItemsSource="{Binding StringListName, ElementName=WindowName}"


Obviously, replace StringListName and WindowName with the name they actually have in your window.

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