private void button1_Click(object sender, EventArgs e) { string myConnection = "datasource= localhost; port = 3306; username = root; password = animesh1!"; string q1 = "select * from userreg.registration where username = '******' and password= '******'; "; string q2 = "select usertype from userreg.registration where username ='******' and password= '******'; "; string q3 = "select idregistration from userreg.registration where username = '******' and password = '******'; "; MySqlDataReader myReader; using (MySqlConnection myConn = new MySqlConnection(myConnection)) { myConn.Open(); using (MySqlCommand command1 = new MySqlCommand(q1, myConn)) { try { myReader = command1.ExecuteReader(); int count = 0; while (myReader.Read()) { count = count + 1; } if (count == 1) { MessageBox.Show("Username and Password is correct"); } else if (count > 1) { MessageBox.Show("Duplicate...Access Denied"); } else { //string msg = count.ToString(); MessageBox.Show("Incorrect Username and Password"); } myReader.Close(); } catch (Exception ex) { MessageBox.Show(ex.Message); } } using (MySqlCommand command3 = new MySqlCommand(q3, myConn)) { try { } catch (Exception ex2) { MessageBox.Show(ex2.Message); } } using (MySqlCommand command2 = new MySqlCommand(q2, myConn)) { try { string x = Convert.ToString(command2.ExecuteScalar()); if (x == "Customer") { this.Hide(); customer f = new customer(); f.ShowDialog(); } else if (x == "Hotel Staff") { this.Hide(); hotelstaff f = new hotelstaff(); f.ShowDialog(); } else if (x == "Admin") { this.Hide(); admin f = new admin(); f.ShowDialog(); } } catch (Exception ex1) { MessageBox.Show(ex1.Message); } } } }