ExpandoObject对象的绑定问题

系统的Eval处理不了，要重写页面或者用户控件的Eval:

 

1 protected new object Eval( string expression)
2 {
3 object obj = this .Page.GetDataItem();
4 IDictionary < string , object > items = obj as IDictionary < string , object > ;
5 if (items != null )
6 return items[expression];
7 else
8 return DataBinder.Eval( this .Page.GetDataItem(), expression);
9 }