How to get current Windows Login Name in C# Web APP?

Question

How can I get the user name of Windows Login? I used these methods:

• Environment.UserName
• WindowsIdentity.GetCurrent().Name;

But, when I

Answer 1

Take a look at:

https://richhewlett.com/2011/02/15/getting-a-users-username-in-asp-net/

Here are the main examples from the link above:

Scenario 1: Anonymous Authentication in IIS with impersonation off.

HttpContext.Current.Request.LogonUserIdentity.Name  -> COMPUTER1\IUSR_COMPUTER1
HttpContext.Current.Request.IsAuthenticated -> False
HttpContext.Current.User.Identity.Name  -> –
System.Environment.UserName -> ASPNET
Security.Principal.WindowsIdentity.GetCurrent().Name    -> COMPUTER1\ASPNET

Scenario 2: Windows Authentication in IIS, impersonation off.

HttpContext.Current.Request.LogonUserIdentity.Name  -> MYDOMAIN\USER1
HttpContext.Current.Request.IsAuthenticated -> True
HttpContext.Current.User.Identity.Name  -> MYDOMAIN\USER1
System.Environment.UserName -> ASPNET
Security.Principal.WindowsIdentity.GetCurrent().Name    -> COMPUTER1\ASPNET

Scenario 3: Anonymous Authentication in IIS, impersonation on

HttpContext.Current.Request.LogonUserIdentity.Name  -> COMPUTER1\IUSR_COMPUTER1
HttpContext.Current.Request.IsAuthenticated -> False
HttpContext.Current.User.Identity.Name  -> –
System.Environment.UserName -> IUSR_COMPUTER1
Security.Principal.WindowsIdentity.GetCurrent().Name    -> COMPUTER1\IUSR_COMPUTER1

Scenario 4: Windows Authentication in IIS, impersonation on

HttpContext.Current.Request.LogonUserIdentity.Name  -> MYDOMAIN\USER1
HttpContext.Current.Request.IsAuthenticated -> True
HttpContext.Current.User.Identity.Name  -> MYDOMAIN\USER1
System.Environment.UserName -> USER1
Security.Principal.WindowsIdentity.GetCurrent().Name    -> MYDOMAIN\USER1

Note:

SERVER1\ASPNET: Identity of the running process on server.
SERVER1\IUSR_SERVER1: Anonymous guest user defined in IIS.
MYDOMAIN\USER1: The user of the remote client.