bind to a property in the parent control

Question

i have the following case:

Window
  |_Grid
      |_ListView (MainProductGrid)
           |_View
               |_GridView
                    |_GridViewColum         


        

Answer 1

Well since you're in the context of a DataTemplate you cannot access the property via TemplatedParent mode, at least in your case. It refers to the element to which the template (in which the data-bound element exists) is applied. [...] Link I'm not sure, that it can be used in a DataTemplate because I've only seen it in ControlTemplates, but since the docs are not telling otherwise...

What you can do is to try find the Ancestor. E.g.

<Label Content="{Binding AlternationIndex, 
       RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type ListView}}" ... />

I didn't used in DataTemplates yet, so no warranty.

Answer 2

please try this :

 <Label Content="{Binding (ListView.AlternationIndex),
    RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type ListViewItem}}}"  />

Update: here is the corret xaml, the binding should be to relativae source=ListViewItem, yet there was a problem with the grid column width:

  <ListView.View>
            <GridView AllowsColumnReorder="False">
                <GridViewColumn x:Name="gvc" Header="id"  Width="30">
                    <GridViewColumn.CellTemplate>
                        <DataTemplate>
                            <TextBlock Text="{Binding (ListView.AlternationIndex),
                                RelativeSource={RelativeSource FindAncestor,
                                    AncestorType={x:Type ListViewItem}}}"/>
                        </DataTemplate>
                    </GridViewColumn.CellTemplate>
                </GridViewColumn>

                <GridViewColumn Header="Product name" 
                                DisplayMemberBinding="{Binding Path=ProductName}"  
                                Width="auto" />
            </GridView>
        </ListView.View>

Answer 3

You can use

RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type ListView}} 

to find a specific control above you