Binding DataGrid column Header to DataContext

Question

I know this question has been asked before, but none of the \"previous\" answers seems to work for me...

I have implemented a functionality for multi languages in my

Answer 1

correct. there is no elemet in visual tree directly mapping to DataGridTextColumn so you can't use RelativeSource with AncestorType (i.e. DataGridTextColumn is not a control hence it doesn't have a parent control). below code should work fine

<DataGridTextColumn Binding="{Binding Name}">
  <DataGridTextColumn.Header>
    <TextBlock Text="{Binding DataContext.Text[Name],
                      RelativeSource={RelativeSource AncestorType=DataGrid}}"/>
  </DataGridTextColumn.Header>
</DataGridTextColumn>

Answer 2

You may need to walk back up the tree to get the DataContext you want:

<DataGridTextColumn Binding="{Binding Name}">
    <DataGridTextColumn.HeaderTemplate>
        <DataTemplate>
            <TextBlock Text="{Binding DataContext.Text[Name],
                       RelativeSource={RelativeSource AncestorType=DataGrid}}"/>
        </DataTemplate>
    </DataGridTextColumn.HeaderTemplate>
</DataGridTextColumn>

Doing this directly on the Header property will not work because it cannot be resolved in-place as the column is an abstract object not appearing in the tree.