How to get user name using Windows authentication in asp net

Question

I want to get user name using Windows authentication  Actually I implemented  Sign in as different user  when click this button Windows security will appear there we can give credentials   In that time if I give some other credential it is taking current user name only  How to get that given credential user name from windows security   Host application in IIS then anonymous authentication has disabled and windows authentication was enabled   web config    lt system web gt       lt compilation debug  true  targetFramework  4 0    gt     lt identity impersonate  true   gt     lt authorization gt         lt allow users      gt         lt deny users      gt     lt  authorization gt   lt  system web gt   lt system webServer gt       lt directoryBrowse enabled  true    gt       lt security gt           lt authentication gt               lt anonymousAuthentication enabled  false    gt               lt windowsAuthentication enabled  true    gt           lt  authentication gt       lt  security gt       cs  Here I am getting the default User name always  string fullName   Request ServerVariables  LOGON USER      Any ideas  Thanks in advance

User · Answer

It depends on the configuration of the application as well as on IIS as this gentleman in the below link has rightfully explained. Please see his article below

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

User · Answer

These are the different variables you have access to and their values  depending on the IIS configuration    Scenario 1  Anonymous Authentication in IIS with impersonation off   HttpContext Current Request LogonUserIdentity Name    SERVER1 IUSR SERVER1  HttpContext Current Request IsAuthenticated           False                     HttpContext Current User Identity Name                                            System Environment UserName                           ASPNET                    Security Principal WindowsIdentity GetCurrent   Name  SERVER1 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  SERVER1 ASPNET   Scenario 3  Anonymous Authentication in IIS  impersonation on  HttpContext Current Request LogonUserIdentity Name    SERVER1 IUSR SERVER1  HttpContext Current Request IsAuthenticated           False                     HttpContext Current User Identity Name                                            System Environment UserName                           IUSR SERVER1            Security Principal WindowsIdentity GetCurrent   Name  SERVER1 IUSR SERVER1    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   Legend 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   Source

User · Answer

This should work   User Identity Name   Identity returns an IPrincipal  Here is the link to the Microsoft documentation

User · Answer

You can get the user s WindowsIdentity object under Windows Authentication by   WindowsIdentity identity   HttpContext Current Request LogonUserIdentity    and then you can get the information about the user like identity Name   Please note you need to have HttpContext for these code

User · Answer

I think because of the below code you are not getting new credential  string fullName   Request ServerVariables  LOGON USER      You can try custom login page

User · Answer

Username you get like this   var userName   HttpContext Current Request LogonUserIdentity  Name

User · Answer

You can read the Name from WindowsIdentity   var user   System Security Principal WindowsIdentity GetCurrent   Name  return Ok user

[c#] How to get user name using Windows authentication in asp.net?

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