Hello Team

Problem 1: I've found a problem if I take a survey and multiple clicks submit button, and it will cause duplicate POST.

Problem 2: If I've submitted the survey and press browser's previous button. And I re-edit the survey and submit, and it will cause duplicate POST.
How do I solve those two problems?

Thanks.
 

I've used the security addin features (menu/ security).

But cookie couldn't solve problem 1, number limitation only limit how many numbers of the voter can use.

Only "asp.net security context" and  "Survey security context" could solve multiple submissions problem.

About "asp.net security context". Did the "ContextUserName" could save custom authed value, and not the default login value?