private void button1_Click(object sender, EventArgs e) { username = textBox1.Text; CONNECT conn = new CONNECT(); DataTable table = new DataTable(); MySqlDataAdapter adapter = new MySqlDataAdapter(); MySqlCommand command = new MySqlCommand(); String query = "SELECT * FROM `user` WHERE `username`=@usn AND `password`=@pass"; command.CommandText = query; command.Connection = conn.getConnection(); command.Parameters.Add("@usn", MySqlDbType.VarChar).Value = textBox1.Text; command.Parameters.Add("@pass", MySqlDbType.VarChar).Value = textBox2.Text; adapter.SelectCommand = command; adapter.Fill(table); //if the username and the password exist or match if (table.Rows.Count > 0) { foreach (DataRow dr in table.Rows) { if (dr["role"].ToString() == "Admin") { MessageBox.Show("You are logged in as Admin"); this.Hide(); Admin adminPanel = new Admin(); adminPanel.Show(); } else if (dr["role"].ToString() == "Staff") { MessageBox.Show("You are logged in as Staff"); this.Hide(); Staff staffPanel = new Staff(); staffPanel.Show(); } else if (dr["role"].ToString() == "Trainer") { MessageBox.Show("You are logged in as Trainer"); this.Hide(); Trainer trainerPanel = new Trainer(); trainerPanel.Show(); } else { MessageBox.Show("This username or password doesnt exists!", "Wrong username or password", MessageBoxButtons.OK, MessageBoxIcon.Error); } } } /* * MessageBox.Show("You are logged in as " + comboBox1.SelectedItem.ToString()); * if (comboBox1.SelectedIndex == 0) * { * this.Hide(); * Admin admin = new Admin(); * admin.Show(); * } * else if (comboBox1.SelectedIndex == 1) * { * this.Hide(); * Staff staff = new Staff(); * staff.Show(); * } * else * { * this.Hide(); * Trainer trainer = new Trainer(); * trainer.Show(); * }*/ else { if (textBox1.Text.Trim().Equals("")) { MessageBox.Show("Please enter Username!", "Empty Username", MessageBoxButtons.OK, MessageBoxIcon.Error); } else if (textBox2.Text.Trim().Equals("")) { MessageBox.Show("Please enter Password!", "Empty Password", MessageBoxButtons.OK, MessageBoxIcon.Error); } else { MessageBox.Show("This username or password doesnt exists!", "Wrong username or password", MessageBoxButtons.OK, MessageBoxIcon.Error); } } }