嵌套的listview数据绑定 - 找不到属性？

I have a listview, where I set the datasource in the code-behind - this works fine. When I add another listview (or databound control) to the listview's itemtemplate, and set the datasource for that control in the codebehind, the fields returned by the query seem to be unavailable to the nested listview; ASP.NET throws the following error: DataBinding: 'System.String' does not contain a property with the name 'j_Name'.I have a listview, where I set the datasource i