SYS. webforms. pagerequestmanagerparsererrorexception: unable to analyze messages received from the server

When I used updatepannel today, I found that a javascript error is always prompted when I clicked the button to trigger the event. At first I thought it was a JS problem. Later I commented it out, and I still asked this prompt, baidu once found this article and solved my problem. Now I am posting it for your reference.

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SYS. webforms. pagerequestmanagerparsererrorexception:

The common cause of this error is that the response filter, httpmodules, or server tracing will be enabled when response. Write () is called to modify the response.

Details: An error occurred while analyzing the "output content" nearby.

 

The solution is as follows:

1. if you call response. the server control of the write () method adds a <triggers> node under updatepanel to the page where updatepanel is used. You can use postbacktrigger to register and modify the control. The Code is as follows:

1. <asp: scriptmanager id = "scriptmanager1" runat = "server">
2. </ASP: scriptmanager>
3. <asp: updatepanel id = "updatepanel1" runat = "server">
4. <triggers>
5. <asp: postbacktrigger controlid = "button2"/> <! -- Button2 is the following button ID that needs to use response. Write () in the button2_click event -->
6. </triggers>
7. <contenttemplate>
8. <asp: button id = "button2" runat = "server" onclick = "button2_click" text = "button"/>
9. <asp: updateprogress id = "updateprogress1" runat = "server">
10. <progresstemplate> </progresstemplate>
11. </ASP: updateprogress>
12. </contenttemplate>
13. </ASP: updatepanel>

2. However, if you use updatepanel on the master page, you cannot solve the problem by using the preceding method. Otherwise, the following error may occur:

A control with ID 'btnexport' could not be found for the trigger in updatepanel 'updatepanel1 '.

This is because the control registered in <asp: postbacktrigger controlid = "btnexport"/> cannot be found in updatepanel1, because we generally did not add this control (btnexport) to the master page ). (Of course, if you add a control with the ID of btnexport to the <contenttemplate> node of updatepanel, no error will occur .)

What should I do if such an error occurs? My solution is to add the following code in the page_load event of the page where the control using the response. Write () method is located:
(Scriptmanager) master. findcontrol ("scriptmanager1"). registerpostbackcontrol (btnexport );

// Scriptmanager1 is the ID of <asp: scriptmanager id = "scriptmanager1" runat = "server"> </ASP: scriptmanager>

Address: http://www.cnblogs.com/shenyixin/archive/2012/03/08/2385376.html