windows authentication user coming up blank - asp.net

Question

I'm attempting to setup windows authentication in an asp.net web application.
Running the following code in an aspx page does not return any info ..
User.Identity.Name.ToString()
Here's what I've done so far:
The server is win 2008 r2. In IIS I've enabled Windows Authentication.
In the Advanced settings of Windows Authentication is Extended Protection:Off and Enable Kernel-mode authentication.
In the web.config of my app, I've got the following:
<authentication mode="Windows"/>
in the system.web node.
In the pageload of the default aspx I have the following..
string userName=" ++ " + User.Identity.Name.ToString() + " ++ ";
ltrTest.Text = userName;
All it returns is " ++ ++ ".

Answer 1

There are a few things you need to do. In your development machine, when running your application locally, you'll need to disable anonymous authentication and enable windows authentication. To do this, you will need to click on your project properties. There, you should see Development Server (I click on my solution, then click the properties tab). You then change the Anonymous Authentication to Disabled and then Windows Authentication To Enabled.
You should then be able to use
string userName = User.Identity.Name;
ltrTest.Text = userName;
This should do it. Hope this helps.
EDIT: I have set up windows auth in a new app and published to IIS and displayed label as username.
Steps:
1)
<authentication mode="Windows">
<forms loginUrl="~/Account/Login" timeout="2880" defaultUrl="~/" />
</authentication>
<authorization>
<deny users = "?" />
</authorization>
This is how I set up the webconfig. If you have
<identity impersonate="true"/>
you will want to remove it.
2)Published to IIS
3)Opened site home in IIS and clicked on Authentication.
4)Disabled Anonymous Authentication and Enabled Windows Authentication.
Note: Windows Authentication is the only thing that is suppose to be enabled. If anything else is enabled(Impersontaion) disable it.
5)On local pc, navigated to the site, typed in credentials in log in prompt
That's it. With labels that I placed in the default.aspx page, I was able to see my username in the format of DOMAIN\User. I also displayed the authentication type and if user was authenticated.
This should work as I have just tested it out.