你好



你一定是遗失了什么



会话价值将通过

Hi

You must be missing something

Session values will be available through

System.Web.HttpContext.Current.Session["VariableName"]

在获得会话价值之前，你必须设置它。



在尝试获取之前，您没有设置它或会话过期。

Before getting session value you must set it .

Either you are not setting it or your session expires before you trying to get it.

默认情况下，ASP.NET中的会话超时为20分钟。要增加超时或到期，您必须在web.config文件中更改SessionState的超时属性

By default, Session timeouts are 20 minutes in ASP.NET. To increase the timeout or expiry you have to change the timeout attribute for SessionState in the web.config file

<sessionstate timeout="40" />

如果您使用的是表单身份验证，则必须调整此属性：

If you are using Forms authentication, You have to adjust this attribute:

<authentication mode="Forms">
          <forms timeout="40" />
    </authentication>