The session status can be used only when enablesessionstate is set to true in the configuration file or page command. Make sure that the \ section of the application configuration contains ..

Recently, I used vs2010 to create a web project. It is okay to run the project. However, when the web design interface is opened, the control cannot be displayed normally and an error is prompted:

The session status can be used only when enablesessionstate is set to true in the configuration file or page command. Make sure thatProgramThe <configuration> \ <system. Web> \

Follow the prompts to search online.

 

No way, I finally created a new project, added files one by one, and finally found the problem: it was caused by the main project using a class library originally written in vs2005.

 

Solution: Use vs2010 to create a class library project, reference the class library compiled by vs2005, and then provide the required function interface for the main project to call. The problem is solved!