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POGetting the full-name of the current user, returns an empty string (C#/C++)
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  1. POGetting the full-name of the current user, returns an empty string (C#/C++)
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    copied!<ul> <li><p>I try to get the full-name of the current log-in user (Fullname, not username).</p></li> <li><p>The following code C#, C++ works fine but on XP computers not connected to the Net, I get empty string as result if I run it ~20 minutes after login (It runs OK whithin the first ~20 minutes after login)</p></li> <li><p>A Win32 API (GetUserNameEx) is used rather that PrincipalContext since it PrincipalContext may takes up to 15 seconds when working offline.</p></li> <li><p>Any Help why am I getting an empty string as result though a user full name is specified???</p></li> </ul> <h2>- C# Code</h2> <pre><code> public static string CurrentUserFullName { get { const int EXTENDED_NAME_FORMAT_NAME_DISPLAY = 3; StringBuilder userName = new StringBuilder(256); uint length = (uint) userName.Capacity; string ret; if (GetUserNameEx(EXTENDED_NAME_FORMAT_NAME_DISPLAY, userName, ref length)) { ret = userName.ToString(); } else { int errorCode = Marshal.GetLastWin32Error(); throw new Win32Exception("GetUserNameEx Failed. Error code - " + errorCode); } return ret; } } [DllImport("Secur32.dll", CharSet = CharSet.Auto, SetLastError = true)] private static extern bool GetUserNameEx(int nameFormat, StringBuilder lpNameBuffer, ref uint lpnSize); </code></pre> <h2>- Code in C++</h2> <pre><code>#include "stdafx.h" #include &lt;windows.h&gt; #define SECURITY_WIN32 #include &lt;Security.h&gt; #pragma comment( lib, "Secur32.lib" ) int _tmain(int argc, _TCHAR* argv[]) { char szName[100]; ULONG nChars = sizeof( szName ); if ( GetUserNameEx( NameDisplay, szName, &amp;nChars ) ) { printf( "Name: %s\n", szName); } else { printf( "Failed to GetUserNameEx\n" ); printf( "%d\n", GetLastError() ); } return 0; } </code></pre>
 

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