Collection of errors in ASP. NET

Error records:
 
1. If the updatepanel control is used, the fileupload between updatepanel is invalid! The hasfile attribute of fileupload is always false;
2. In this document, 'sys 'is used to define whether the Web configuration is an Ajax configuration file.
3. "No permission": If freetextbox Rich Text third-party control is used, the problem is that it

4. binary serialization errors:
The stored data type is different from the retrieved data type.
Objectmanager finds that the number of link addresses is invalid. This usually indicates formatting.ProgramThere is a problem.
5. The status information of this page is invalid and may be damaged:
Solution 1. <system. Web>
<Pages enableeventvalidation = "false" viewstateencryptionmode = "never">
</Pages>
</System. Web>
Solution 2. If Ajax is used to request data:

Reference: http://www.diybl.com/course/4_webprogram/asp.net/netjs/20090412/164874.html
Remove the <form> </form> label on the request address page!