wpf - 与 ElementName 绑定(bind)不起作用

Question

这是 XAML:

<DataGrid Grid.Column="0"  AutoGenerateColumns="False" HorizontalAlignment="Stretch" VerticalAlignment="Stretch" ItemsSource="{Binding Path=Columns}"
              x:Name="ColumnsGrid" RowHeaderWidth="0">
        <DataGrid.Columns>
            <DataGridTextColumn Width="*" Binding="{Binding Path=Header}" 
                                Header="{Binding ElementName=ColumnsGrid, Path=DataContext.Count, StringFormat=Columns ({0}), diag:PresentationTraceSources.TraceLevel=High}"/>
        </DataGrid.Columns>  
    </DataGrid>

绑定(bind)返回错误:System.Windows.Data 错误:2:找不到目标元素的管理 FrameworkElement 或 FrameworkContentElement。

我想念什么？

更新:

这是答案:
http://blogs.msdn.com/b/jaimer/archive/2008/11/22/forwarding-the-datagrid-s-datacontext-to-its-columns.aspx

What is happening here? The Columns collection is just a property in the Datagrid; this collection is not in the logical (or visual) tree, therefore the DataContext is not being inherited, which leads to there being nothing to bind to.

更新 2:
关于 DataGrid 警告的好文章:http://blogs.msdn.com/b/vinsibal/archive/2009/04/07/5-random-gotchas-with-the-wpf-datagrid.aspx

Answer 1

绑定(bind) DataGridColumn对于 Header abd Visibility属性需要特殊处理...

看到这个...

Bind datagrid column visibility MVVM