Sys.WebForms.PageRequestManagerServerErrorException: unknown error

Question

I created a text area that allows users to enter html code. When I try to send this code back to the server, I get a pop-up window that says "Sys.WebForms.PageRequestManagerServerErrorException: Unknown error encountered while processing the request on the server. Status code returned from server: 500".

I believe this is due to the fact that what I'm sending back contains html.

How to do it safely and not cause this error message?

Thanks!

Answer 1

, , -, , , , cookie, RoleManager ..

:

• http://forums.asp.net/p/1046935/1576341.aspx#1576341
• http://forums.asp.net/p/1069384/1555817.aspx

, , , XSS .

Answer 2

validateRequest = "false" , , , Server.HtmlEncode Server.HtmlDecode.