SilverLight DataGrid 自定义列数据绑定 上下文代理器 DataContextProxy

public class DataContextProxy : FrameworkElement
{
public DataContextProxy()
{
this.Loaded += new RoutedEventHandler(DataContextProxy_Loaded);
}

void DataContextProxy_Loaded(object sender, RoutedEventArgs e)
{
Binding binding = new Binding();
if (!String.IsNullOrEmpty(BindingPropertyName))
{
binding.Path = new PropertyPath(BindingPropertyName);
}
binding.Source = this.DataContext;
binding.Mode = BindingMode;
this.SetBinding(DataContextProxy.DataSourceProperty, binding);
}

public Object DataSource
{
get { return (Object)GetValue(DataSourceProperty); }
set { SetValue(DataSourceProperty, value); }
}

public static readonly DependencyProperty DataSourceProperty =
DependencyProperty.Register("DataSource", typeof(Object), typeof(DataContextProxy), null);

public string BindingPropertyName { get; set; }

public BindingMode BindingMode { get; set; }

}