如何从活动目录中获取用户的计算机名称

Question

我不熟悉使用Active Directory并希望创建从用户获取用户名的搜索表单，使用该名称进行通配符搜索并返回找到的用户名及其计算机名称。我使用以下代码：

private SearchResultCollection GetSearchResultCollection(string DomainName, string Filter)
{
   try
   {
       /* Getting connection info. */
       Login ObjLogin = new Login();
       string ServerIP = ObjLogin.GetSystemSettingByName("LDAPServer");
       string Port = ObjLogin.GetSystemSettingByName("Port");
       string UserName = ObjLogin.GetSystemSettingByName("ADUsername");
       string Password = ObjLogin.GetSystemSettingByName("ADPassword");

       DirectoryEntry Ldap = new DirectoryEntry(@"LDAP://" + ServerIP + ":" + Port, UserName, Password);

       DirectorySearcher LdapSearcher = new DirectorySearcher(Ldap);
       LdapSearcher.Filter = Filter;

       return LdapSearcher.FindAll();
  }
  catch (Exception ex)
  {
      return null;
  }
}


public string FindUsernameInAD(string Username, out int Count)
{
    Count = 0;
    string FoundUsername = Username;

    try
    {
       /* Getting domain name */
       Login ObjLogin = new Login();
       string DomainName = ObjLogin.GetSystemSettingByName("DomainName");

       SearchResultCollection LdapSearcherResults = GetSearchResultCollection(DomainName, "(&(objectClass=user))");

       foreach (SearchResult resultLdap in LdapSearcherResults)
       {
          if ((resultLdap.Properties["sAMAccountName"] != null) && (resultLdap.Properties["sAMAccountName"].Count > 0))
          {
             if (resultLdap.Properties["sAMAccountName"][0].ToString().ToLower().Contains(Username.ToLower()))
             {
                //return resultLdap.Properties["cn"][0].ToString() + "(" + resultLdap.Properties["sAMAccountName"][0].ToString() + "@" + Username + ")";

                FoundUsername = resultLdap.Properties["sAMAccountName"][0].ToString();
                Count++;
             }
          }
       }
    }
    catch (Exception ex)
    {
       /* Catch Exception Here */
       log.Error("Error in UserManager.cs, FindUsernameInAD function: " + ex.Message);
    }

    return FoundUsername;
}

此代码返回我的用户名但没有计算机名称，那么如何获取计算机名称？另外我想知道＆＃34;用户的计算机名称对于活动目录中的每个用户是唯一的吗？＆＃34;