We already have some basic guide on how to use MVC pattern with WebGrid in our blog on this article. Have you follow the steps describe in the guide?

this sample only show data, not edit, i can show data well with webgrid in mvc page, but if edit ans save, it's wrong.

In my simple test project I created to test the scenario, I could not replicate the issue. Attached is the test project, feel free to modify the project to replicate the issue.

i run this simple, and the same error:

Server cannot set content type after HTTP headers have been sent.

at :   <% Html.RenderPartial("LogOnUserControl"); %>

I have consulted this issue with he developer, unfortunately it seems Intersoft control has not support MVC2 and VS2010.

The blog article is meant for MVC1 and Visual Studio 2008 and the attached project is created using VS2008.

Curerntly, support for MVC2 is being investigated by our developer.