How to determine how big the Request.Form object is?

Question

I am making a web service and a portion of it includes enforcing different maximum form sizes on different pages.

Other than running through the Form object and doing a .Length on all of the strings, is there a clean way of quickly determining the size of the submitted form values? Particularly in the context of a POST request.

Answer 1

Is this an ASMX web service? Then what about Request.TotalBytes?