Encountering issue - SCRIPT5022: Error parsing message from server in Sys.WebForms.PageRequestManagerParserErrorException

I'm in need of assistance. I've developed a web application in .Net 3.5 that utilizes asp.net Master page, update panel, and server controls. The asp.net page created with the Master page includes an update panel that contains other server controls. My issue arises when trying to trigger a postback of a link button within the Update panel using JavaScript.

__doPostBack('<%= ServerControl.ClientID.Replace("_","$") %>', '');

While all browsers execute this code without any problems, IE7 refuses to cooperate and throws the following error message:

SCRIPT5022: Sys.WebForms.PageRequestManagerParserErrorException: The message received from the server could not be parsed. Common causes for this error are when the response is modified by calls to Response.Write(), response filters, HttpModules, or server trace is enabled.
Details: Error parsing near '

<!DOCTYPE html P'. 
ScriptResource.axd?d=83rNjjrfU8utKX3Fb9DiQ2ssFx4VjayT06ZNJ9Aj38iN2ufeWDf1Hd7nu73QshB8Q80tcmosFZ1IQcnqEvC-7nMUe8kLPGpreZP7iBWnviMAl8vzvxmED51yr720yzPv0&t=ffffffffec2d9970, line 513 character 13

I have tried setting 

ValidateRequest="false" EnableEventValidation="false"

but the problem persists. I opted for the Update panel to enable asynchronous requests to the client, avoiding full-page reloads associated with PostBack events.

If anyone has insights on how to resolve this issue, your help would be greatly appreciated.

Thank you,

Anvesh

javascriptasp.netupdatepanelinternet-explorer-7dopostback

Answer №1

Main causes of this issue:

  • Excessive use of Response.Write():
  • Utilizing response filters
  • Interactions with HttpModules
  • Enabling server trace functionality
  • Frequent usage of Server.Transfer()

To learn more about preventing this error, please visit the following blog post: Sys.WebForms.PageRequestManagerParserErrorException - understanding the cause and how to prevent it

Answer №2

After facing a challenge, I managed to find a solution on my own.

What worked for me was setting

ValidateRequest="false"

in the page directive. Additionally, I removed action="#" from the form tag.

I made this change:

<form id="Form1" method="post" action="#" runat="server">

to this:

<form id="Form1" method="post" runat="server">

I'm sharing my solution here so others facing the same issue can benefit from it.

Best regards, Anvesh

Answer №3

Encountering a similar issue, I uncovered that the root cause was an error stemming from a trigger within the table where I attempted to perform the insertion.

After resolving the trigger problem, the issue was successfully resolved.

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