private void btnLogin_Click(object sender, EventArgs e) { LoginController login_controller = new LoginController(); if (!GLOBALS.isAlphaNumeric(txtUsername.Text) || !GLOBALS.isAlphaNumeric(txtPassword.Text)) { return; } if (login_controller.validateLogin(txtUsername.Text, txtPassword.Text)) { MessageBox.Show("Success!"); this.Hide(); if (Member.membership_type == "administrator" || Member.membership_type == "data entry operator") { HomePageAdmin homepage_admin = new HomePageAdmin(); homepage_admin.ShowDialog(); } else if (Member.membership_type == "student" || Member.membership_type == "faculty") { HomePage homepage = new HomePage(); homepage.ShowDialog(); } txtUsername.Text = ""; txtPassword.Text = ""; this.Show(); } else { MessageBox.Show("Your username and password are not match!"); } }