CODEWITHSUNDEEP
wpfxamldata-bindingitemscontrol
Andrew Hanlon
Andrew Hanlon

Reputation: 7451

Bind to an ItemsControl's Templated Parent from inside the ItemsControl.ItemTemplate

What is the proper way to bind to the Parent of an ItemsControl from within the ItemsControl.ItemTemplate?

Non working attempt:

<ControlTemplate TargetType="{x:Type local:ParentUserControl}">
        <ItemsControl ItemsSource="{Binding MyCollectionViewSource.View, RelativeSource={RelativeSource TemplatedParent}}"
                  IsTabStop="False"
                  Focusable="False">
            <ItemsControl.ItemTemplate>
                <DataTemplate>
                    <local:ChildUserControl BoundProp1="{Binding Prop1}"
                     BoundObjProp2="{Binding RelativeSource={RelativeSource    
                     Mode=FindAncestor, 
                     AncestorType={x:Type local:ParentUserControl}}}"/>
                </DataTemplate>
            </ItemsControl.ItemTemplate>    
        </ItemsControl>
</ControlTemplate>

Upvotes: 0

Views: 1891

Answers (3)

TheBlueSky
TheBlueSky

Reputation: 5948

I had similar requirement and the following worked for me:

<ItemsControl ItemsSource="{Binding Items}">
    <ItemsControl.ItemsPanel>
        <ItemsPanelTemplate>
            <WrapGrid Orientation="Horizontal" ItemWidth="{Binding ItemWidth}" ItemHeight="{Binding ItemHeight}"/>
        </ItemsPanelTemplate>
    </ItemsControl.ItemsPanel>

    <ItemsControl.ItemTemplate>
        <DataTemplate >
            <views:MyUserControl
                Width="{Binding DataContext.ItemWidth, ElementName=PageRoot}"
                Height="{Binding DataContext.ItemHeight, ElementName=PageRoot}"/>
        </DataTemplate>
    </ItemsControl.ItemTemplate>
</ItemsControl>

P.S. my app is in XAML for WinRT

Upvotes: 1

Andrew Hanlon
Andrew Hanlon

Reputation: 7451

I have not found a solution to this problem. In the end I had to use work arounds which violated my desired separation of concerns, but functioned as expected. I believe this comes down to an issue in the wpf framework, hopefully 4.5 will fix it.

Upvotes: 0

brunnerh
brunnerh

Reputation: 185350

The binding looks fine to me, but you do not specify a Binding.Path, are you sure that you want to bind directly to the control and not a property?

Upvotes: 1

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