ASP.Net Login & User Authentication

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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..

Posted 9-Feb-12 17:38pm

AmitKumar89

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Comments

Al Moje 10-Feb-12 0:09am

Use ASP.Net Web Site Administration Tool
On your project Solution click the icon 'ASP.NET Configuration'
Use ASP.Net Web Site Administration Tool then setup/configure the following:
Security
Application
Provider

2 solutions

Solution 1

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.

Posted 9-Feb-12 18:04pm

Nathan Stiles

Comments

Sergey Alexandrovich Kryukov 11-Feb-12 1:27am

Sure, a 5. And thanks to you note, I fixed my mistake in my answer. :-)
--SA

Tech Code Freak 11-Feb-12 6:28am

5up!

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Sergey Alexandrovich Kryukov · Accepted Answer · 2012-02-09T18:23:00

Solution 2

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

Posted 9-Feb-12 18:23pm

Sergey Alexandrovich Kryukov

Updated 10-Feb-12 19:26pm

v3

Comments

Nathan Stiles 10-Feb-12 0:31am

What? Membership can't be null, it's a static class.

Sergey Alexandrovich Kryukov 11-Feb-12 1:25am

Oh, my bad! I tried to write it in a blindfolded way and did this mistake. Will fix. Thank you very much for your help.
--SA

Espen Harlinn 11-Feb-12 5:08am

5'ed!

Sergey Alexandrovich Kryukov 11-Feb-12 5:20am

Thank you, Espen.
--SA

Tech Code Freak 11-Feb-12 6:28am

5up!

Sergey Alexandrovich Kryukov 11-Feb-12 14:20pm

Thank you very much.
--SA