Creating user in active directory - asp.net

Question

I'm gonna build a webpart for creating user in active directory .
For creating user account i use method like this :
public string CreateUserAccount(string ldapPath, string userName,
string userPassword)
{
try
{
string oGUID = string.Empty;
string connectionPrefix = "LDAP://" + ldapPath;
DirectoryEntry dirEntry = new DirectoryEntry(connectionPrefix);
DirectoryEntry newUser = dirEntry.Children.Add
("CN=" + userName, "user");
newUser.Properties["samAccountName"].Value = userName;
newUser.CommitChanges();
oGUID = newUser.Guid.ToString();
newUser.Invoke("SetPassword", new object[] { userPassword });
newUser.CommitChanges();
dirEntry.Close();
newUser.Close();
}
catch (System.DirectoryServices.DirectoryServicesCOMException E)
{
//DoSomethingwith --> E.Message.ToString();
}
return oGUID;
}
When executing this method the following error occurred:
"The server is not operational"

Answer 1

say we have active directory installed with domain TestDomain.com and you have a OU ( Organization Unit ) called USERS and you have a user in it called TestUser
so we can saye the following
ldapDomain: the fully qualified domain as TestDomain.com or dc=contoso,dc=com
objectPath: the fully qualified path to the object: CN=TestUser, OU=USERS, DC=TestDomain, DC=com
userDn: the distinguishedName of the user: CN=TestUser, OU=USERS, DC=TestDomain, DC=com
in creating user you should determine where you want to create by determining its path ( ldap path )
In our sample we can consider it as below :
string ldapPath = "LDAP://OU=USERS, DC=TestDomain, DC=com"
For more information check the following links :
http://www.selfadsi.org/ldap-path.htm
http://www.informit.com/articles/article.aspx?p=101405&seqNum=7
http://msdn.microsoft.com/en-us/library/system.directoryservices.directoryentry.path.aspx

Answer 2

Using System.DirectoryServices
To use this namespace you need to add reference System.DirectoryServices.dll
DirectoryEntry ouEntry = new DirectoryEntry("LDAP://OU=TestOU,DC=TestDomain,DC=local");
for (int i = 3; i < 6; i++)
{
try
{
DirectoryEntry childEntry = ouEntry.Children.Add("CN=TestUser" + i, "user");
childEntry.CommitChanges();
ouEntry.CommitChanges();
childEntry.Invoke("SetPassword", new object[] { "password" });
childEntry.CommitChanges();
}
catch (Exception ex)
{
}
}
Using System.DirectoryServices.AccountManagement
To use this namespace you need to add reference System.DirectoryServices.AccountManagement.dll
PrincipalContext ouContex = new PrincipalContext(ContextType.Domain, "TestDomain.local", "OU=TestOU,DC=TestDomain,DC=local");
for (int i = 0; i < 3; i++)
{
try
{
UserPrincipal up = new UserPrincipal(ouContex);
up.SamAccountName = "TestUser" + i;
up.SetPassword("password");
up.Enabled = true;
up.ExpirePasswordNow();
up.Save();
}
catch (Exception ex)
{
}
}