Hello,

I am using a master page and i have placed a Ajax Script manager and the update panel in that page. Now i am creating a new file, which will inherit the master page, in that new file i am writing the code to download a sample file. But when i click on the Download button i am getting an alert message that Sys.WebForms.PageRequestManagerParserErrorException. I don't know why.

Also the control in the .cs page is not going to the button_click event. It is terminating in the Postback event.

So please any one provide the solution. Or any links of the source material. 

Please help.

Regards,

Sudheendra 

Set the Download Button to Full page Postback.

ScriptManager.GetCurrent(Page).RegisterPostBackControl(buttondowload);

Hi

It is not a good practice to use Response.Write or server.execute from within an ASP.NET page in general. As UpdatePanels work by intercepting the page rendering process you are recieving the errors.

You can put the code to generate the data in an HTTPHandler or you can make the button a PostBackTrigger.

Because of the way updatepanels manage the DOM elements within them, you cannot use Response.Write() with them.

http://weblogs.asp.net/leftslipper/archive/2007/02/26/sys-webforms-pagerequestmanagerparsererrorexception-what-it-is-and-how-to-avoid-it.aspx

http://vijaymodi.wordpress.com/2007/04/13/syswebformspagerequestmanagerparsererrorexception/

http://forums.asp.net/t/1038252.aspx

Adding <pages enableEventValidation="false"/> to your web.config (inside system.web) usually works when setting ValidateRequest="false" does not.

For more information about EnableEventValidation, see: http://msdn2.microsoft.com/en-us/library/system.web.ui.page.enableeventvalidation.aspx

 Hi chetan.sarode,

Thanks for sending links. i will try with these links. If i encounter any problems, then i will post again.

Thank you. 

 Hi,

Thanks for replying. 

 Hi,

Thanks for replying.