我如何：实现n级嵌套gridview？

I am not the gratest when it comes to implementing UX. I looked around on the internet for an implementation of a nested gridview or nested reapeater control. Most of the demos used an sql datasource object. Nowadays I dont see anyone using an sqldatasource. In my scenario I will be using Object Datasource or would be databinding manually. The source of data is a WCF service on wsHttpBinding. I am not the gratest when it comes to implement