ASP.NET

https://localhost:44351/UserDetails?id=1

ParamName               ParamValue

WindowsDomainServer	pcg.porto.loc
BaseDN	                DC=pcg, DC=porto, DC=loc (Base DN)
UserDN	                OU=InformationSystems (User DN)
GroupName	        CN=ITTESTAPP,  OU=IT-Groups, DC=pcg, DC=porto, DC=loc
AccountFilter	        sAMAccountName

protected void btnSubmit_Click(object sender, System.EventArgs e)
  {
      if (txtUserName.Text.Trim().Equals("") || txtPassword.Text.Trim().Equals(""))
      {
          Message.Text = "Please Enter UserName/Password...";
          txtPassword.Text = "";
          txtUserName.Text = "";
      }
      else
      {
          GetADSILogin();
      }

  }
  public void GetADSILogin()
  {
      try
      {
          string strServerName = "";
          string strBaseDN = "";
          string strUserDN = "";
          string strGroupName = "";
          string strAccountFilter = "";

          //Port no for LDAP Default is 389
          string strPortNo = "389";

          Boolean blnGroupUser = false;
          //Data source string

          string source = "Data Source=myDBServerName;Initial Catalog=MyDB;user=mysusername;password=myPassword";
          //SQL statement that will be issued

          string select = "SELECT * from ADSI_Table";

          //SQL Connection
          SqlConnection conn = new SqlConnection(source);

          // Open the database connection
          conn.Open();

          // Create the SQL command...
          SqlCommand cmd = new SqlCommand(select, conn);

          //Execute Data reader
          SqlDataReader myReader = cmd.ExecuteReader();

          //Check if any rows return against user/pass
          if (myReader.HasRows)
          {
              while (myReader.Read())
              {
                  //Store the parameter's data in variables
                  string strParameterName = myReader.GetString(0).Trim();
                  string strParameterValue = myReader.GetString(1).Trim();

                  if (strParameterName.ToUpper().Equals("SERVERNAME"))
                      strServerName = strParameterValue;

                  if (strParameterName.ToUpper().Equals("BASEDN"))
                      strBaseDN = strParameterValue;

                  if (strParameterName.ToUpper().Equals("USERDN"))
                      strUserDN = strParameterValue;

                  if (strParameterName.ToUpper().Equals("GROUPNAME"))
                      strGroupName = strParameterValue;

                  if (strParameterName.ToUpper().Equals("ACCOUNTFILTER"))
                      strAccountFilter = strParameterValue;
              }
          }

          //Search for user
          DirectoryEntry deSystem = new DirectoryEntry("LDAP://" + strServerName + "/" + strUserDN + "," + strBaseDN);
          deSystem.AuthenticationType = AuthenticationTypes.Secure;
          deSystem.Username = txtUserName.Text;
          deSystem.Password = txtPassword.Text;

          //Search for account name
          string strSearch = strAccountFilter + "=" + txtUserName.Text;

          DirectorySearcher dsSystem = new DirectorySearcher(deSystem, strSearch);
          //Search subtree of UserDN

          dsSystem.SearchScope = SearchScope.Subtree;

          //Find the user data
          SearchResult srSystem = dsSystem.FindOne();

          //Pick up the user group belong to
          ResultPropertyValueCollection valcol = srSystem.Properties["memberOf"];

          if (valcol.Count > 0)
          {
              foreach (object o in valcol)
              {
                  //check user exist in Group we are searching for
                  if (o.ToString().Equals(strGroupName + "," + strBaseDN))
                  {
                      blnGroupUser = true;
                      break;
                  }
              }
          }

          if (blnGroupUser == true)
              Message.Text = "Login Sucessfull...";
          else
              Message.Text = "User Does Not Belong to Specified ADSI Group";
      }
      catch (Exception ex)
      {
          Message.Text = (ex.Message);
      }
      int i = 0;
      i = i + 1;

      if (i == 5)
      {
          Message.Text = "Login failed for 5 times. Quiting...";
          this.Close();
      }
  }