ASP.Net登录和用户认证 [英] ASP.Net Login & User Authentication

问题描述

使用asp.net成员资格.我的login.aspx页面转到loginredirect.aspx
用户登录后的页面.

由于某种原因，"Membership.GetUser.ProviderUserKey.ToString"给了我这个
错误:
System.NullReferenceException:对象引用未设置为
的实例 对象.

有什么原因吗?我应该可以正常登录.

还有其他方法可以获取当前用户的UserId吗?

提前thanx..

Using asp.net membership. My login.aspx page goes to the loginredirect.aspx
page after the user logs in.

For some reason "Membership.GetUser.ProviderUserKey.ToString" gives me this
error:
System.NullReferenceException: Object reference not set to an instance of an
object.

Any reason why? I should be logged in fine.

Is there another way in which I should get the current users UserId?

thanx in advance..

推荐答案

您需要执行Membership.GetUser并查看其是否为null.如果它为null而不是未登录，那么您的示例代码字符串提供了两个实例，我可以看到在哪里可以出现null引用. 1)如果getuser返回null，并且2)如果ProviderUserKey为null.

You need to do Membership.GetUser and see if it''s null. If it''s null than you''re not logged in. Your example code string provides two instances I can see where a null ref can occur. 1) if getuser returns null and 2) if ProviderUserKey is null.

始终使用调试器.沃森小学.

一种可能的原因是:
Membership.GetUser == null.

如果不是，则另一个可能的原因是:
Membership.GetUser.ProviderUserKey == null.

就是这样，只有这两种情况.但是，如果您使用了调试器，则无需在此CodeProject页上写一行.

最好的问候，

—SA

Always use the Debugger. Elementary, Watson.

One possible reason is:
Membership.GetUser == null.

If not, another possible reason is:
Membership.GetUser.ProviderUserKey == null.

And that''s it, nothing except these two cases. But if you used the Debugger, you would not need to write a single line on this CodeProject page.

Best regards,

—SA

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