您可以按照本文:)

中所述更改表单身份验证超时>

会话超时在ASP.NET中默认为20分钟.

在您的web.config文件中修改SessionState超时值.

<!--
    Session Timeout To be set to 120 min of inactivity.
    -->
        <sessionState mode="InProc" timeout="120"/>

in my asp.net application, ''log in'' page expired in each 20 minute.. have any solution for it...

You can change the forms authentication timeout as outlined in this article :)

Session timeout is default to 20 min in ASP.NET.

In your web.config file modify SessionState timeout value .

<!--
    Session Timeout To be set to 120 min of inactivity.
    -->
        <sessionState mode="InProc" timeout="120"/>