All or Anyone:

I am developing an Internet application where pictures are dragged and
dropped into place. I am doing the drag and drop on the client side with
javascript(unless anyone can suggest a better approach). When the picture
(or actually diagram) is finished I want to store information on the server.
This information is used both to reproduce the diagram on the client and to
provide info for C# code running on the server. I've tried writing the HTML
into a ViewState and reading it at the server but this results in a Security
Warning  and an Exception.

Is there an easy way to remember dynamically generated HTML in ASP.NET?

Thanks in advance.