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Get logged in user from Active Directory and then get some of their AD attributes

/ Published in: C#
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  1. public UserPrincipal GetLoggedInUser()
  2.         {
  3.             try
  4.             {
  5.                 //Get the principal logged in user
  6.                 WindowsPrincipal principal = System.Threading.Thread.CurrentPrincipal as WindowsPrincipal;
  7.  
  8.                 //split the principal identity name from the domain and put them in an array
  9.                 string delimiter = "\\";
  10.                 string userAndDomain = principal.Identity.Name.ToString();
  11.                 string[] arrayName = userAndDomain.Split(delimiter.ToCharArray());
  12.  
  13.                 //Get the context of this action based on the first item in the arrayName which is the domain
  14.                 PrincipalContext pc = new PrincipalContext(ContextType.Domain, arrayName[0]);
  15.  
  16.                 //Get the userprincipal (user) by matching the username in active directory and the name in the array
  17.                 UserPrincipal p = UserPrincipal.FindByIdentity(pc, IdentityType.SamAccountName, arrayName[1]);
  18.  
  19.  
  20.                 //make sure the userprincipal is a directoryentry then get the user
  21.                 if (p.GetUnderlyingObjectType() == typeof(DirectoryEntry))
  22.                 {
  23.                     DirectoryEntry user = (DirectoryEntry)p.GetUnderlyingObject();
  24.  
  25.                     //The EmpID is located in the wwwHomePage field in AD
  26.                     if (user.Properties["wwwHomePage"].Count > 0)
  27.                     {
  28.                         //set a variable to the wwwHomePage property so we can return it
  29.                         empID = Convert.ToInt32(user.Properties["wwwHomePage"].Value);
  30.                     }
  31.                     else
  32.                     {
  33.                         empID = 0;
  34.                     }
  35.                 }
  36.                 return p;
  37.             }
  38.             catch (Exception ex)
  39.             {
  40.  
  41.                 return null;
  42.             }
  43.         }

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