regarding Active Directory for extracting USER (NT Name - Pre-Windows 2000 User Logon name)

[Will .H]

Hi there,

I have a development issue to find out AD user - Pre-Windows 2000 User Logon name. I use the following code to extract the user logon name (pre-windows2000) and the error comes up.



using (System.DirectoryServices.DirectorySearcher searcher = new System.DirectoryServices.DirectorySearcher())
{
searcher.SearchRoot = domain;
searcher.PropertiesToLoad.Add("sAMAccountName");
searcher.PropertiesToLoad.Add("userPrincipalName");
searcher.PropertiesToLoad.Add("objectSid");

searcher.Filter = "(userPrincipalName=" + userNameOrEmail + ")";

try
{
using (System.DirectoryServices.SearchResultCollection results = searcher.FindAll())
{
if (results == null || results.Count == 0)
{ } //continue;
else
{
byte[] SID = null;

if (results[0].Properties["objectSid"].Count > 0)
{
SID = (byte[])results[0].Properties["objectSid"][0];

//string sid = "S-1-5-21-789336058-507921405-854245398-9938";
string sid = GetSidString(SID);

//this line error -- >

string account = new System.Security.Principal.SecurityIdentifier(sid).Translate(typeof(System.Security.Principal.NTAccount)).ToString();
}
}
}

} // End Try
catch (System.Exception eX)
{ }

} // End Using searcher





the error happened at this line --- string account = new System.Security ........

the error is :

{"Some or all identity references could not be translated."}


Does anyone have any idea on it?? Thanks




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