检查此页面..

http://forums.asp.net/t/245388.aspx/1 [ ^ ]

Check This Page..

http://forums.asp.net/t/245388.aspx/1[^]

<script language="JavaScript">
window.history.forward(1);
</script>

尝试一下.

Try this..

已经有很多关于此的话题.
用户注销后禁用后退按钮功能 [ ^ ]

在单击注销按钮后禁用浏览器后退按钮功能 [ ^ ]

如何在asp.net中禁用后退按钮 [ ^ ]

There are already so many threads about this..

Disable back button functionality when user logged out[^]

Disable Browser Back Button functionality after click on Logout Button[^]

how to disable back button in asp.net[^]