DataBinding ListView ItemTemplate UserControl - xaml

Question

I have a ListView on my Windows Universal page. I am using a UserControl to define my ItemTemplate so that I can use the RelativePanel and VisualStateManager to control how my items appear depending on the screen size...
<ListView ItemsSource="{Binding Path=AllThings}"
ItemContainerStyle="{StaticResource ListViewItemStyle}">
<ListView.ItemTemplate>
<DataTemplate>
<local:CrossingControl />
</DataTemplate>
</ListView.ItemTemplate>
</ListView>
I have a button in my UserControl where I want to bind its Command to a command property in the ViewModel that is the DataContext of the list itself...
<UserControl ...>
<RelativePanel>
<StackPanel x:Name="crossedEntryPanel">
<Button Command="{Binding DataContext.DeleteCommand,
RelativeSource={RelativeSource Mode=TemplatedParent}}"
CommandParameter="{Binding}"
I have tried using the ElementName binding, but it doesn't seem to work (I suppose because my listview element name is defined in another xaml file). I have also tried the above RelativeSource binding, but that doesn't seem to work either. How can I bind this properly?

Answer 1

You can make use of Tag property to save the DataContext of ListView and use it in UserControl
Here how it is done
<ListView ItemsSource="{Binding Path=AllThings}" x:Name="listview"
ItemContainerStyle="{StaticResource ListViewItemStyle}">
<ListView.ItemTemplate>
<DataTemplate>
<local:CrossingControl Tag="{Binding DataContext,ElementName=listview}" />
</DataTemplate>
</ListView.ItemTemplate>
</ListView>
<UserControl x:Name="usercontrol" ...>
<RelativePanel>
<StackPanel x:Name="crossedEntryPanel">
<Button Command="{Binding Tag.DeleteCommand,ElementName=usercontrol}"
CommandParameter="{Binding}"
RelativeSource={RelativeSource Mode=TemplatedParent}}":- this points to controltemplate of button