不提供存储来保存其值。相反，GridView会发布可用于向未绑定列提供数据的 CustomUnboundColumnData 事件，并保存它。帮助主题包含如何使用此事件的示例。另外，你会发现很多有用的信息都是很多有关的绑定列：

Unbound column does not provide a storage to save its values. Instead, the GridView publishes the CustomUnboundColumnData event which can be used to provide data to the unbound column and also save it. The help topic contains the example of how to use this event. Also, you will find a lot of useful information abound unbound columns at:

未绑定列