在MVC中几秒钟后，asp.net会话自动过期

Question

When user login, I'm storing user_id in Session variable and on second page I'm checking on page load if user_id exists then fine, otherwise redirect to sign in page but when I login and and redirected to next page after few seconds it will redirect on login page. I have tried all solutions but all in vain

Important Note: Another thing is that application working fine on development server and also on local IIS in LAN but on live server this issue is occurring. Following web.config file code is

 <system.web>
  <customErrors mode="Off" />
  <trust level="Full" />
  <authentication mode="Forms">
   <forms loginUrl="~/Security/Registration" timeout="30" 
         slidingExpiration="true"  />
  </authentication>
  <sessionState timeout="30"></sessionState>
  <compilation targetFramework="4.5" />
  <httpRuntime targetFramework="4.5" />
 </system.web>

Answer 1

为什么不用下面的行更新sessionState ：

<sessionState mode="InProc" cookieless="false" timeout="30" />

Answer 2

You can set timeout in web.config

<system.web>
    <sessionState mode="InProc" cookieless="false" timeout="30" />
     ....