private void ClickLogInButton(object sender, EventArgs e) { LogIn _logInForm = new LogIn(_pmodel); _logInForm.ShowDialog(); if (_logInForm.CheckSuccessOrNot() == true) { if (_pmodel.IdentifyUser(_pmodel.GetCurrentUser()) == "Professor") { _reviewSelectCourseButton.Visible = true; _addCourseButton.Visible = true; } else if (_pmodel.IdentifyUser(_pmodel.GetCurrentUser()) == "Student") { _dropCourseButton.Visible = true; _selectCourseButton.Visible = true; } _checkClassScheduleButton.Visible = true; _registerButton.Visible = false; _logoutButton.Visible = true; _loginButton.Visible = false; _helloLabel.Text = "Hello!! " + _pmodel.GetCurrentUser(); } }