private void btnEnter_Click(object sender, EventArgs e) { string loginid = txtLogin.Text; string password = txtPassword.Text; string Role = cmbRole.Text; if (Role == "Faculty") { if (accessor.FacultyId_Exists(loginid)) { string actualpassword = accessor.getFacultyPassword(loginid); if (actualpassword.Equals(password)) { Faculty faculty = new Faculty(loginid); faculty.Show(); } else { MessageBox.Show("LoginID or Password is incorrect"); txtLogin.Text = ""; txtPassword.Text = ""; } } else { MessageBox.Show("FacultyId does not exist"); } } else if (Role == "Student") { if (accessor.RollNo_Exists(loginid)) { string actualpassword = accessor.getStudentPassword(loginid); if (actualpassword.Equals(password)) { Student student = new Student(loginid); student.Show(); } else { MessageBox.Show("LoginID or Password is incorrect"); txtLogin.Text = ""; txtPassword.Text = ""; } } else { MessageBox.Show("RollNo does not exist"); } } else if (Role == "Admin") { if (accessor.AdminId_Exists(loginid)) { string actualpassword = accessor.getAdminPassword(loginid); if (actualpassword.Equals(password)) { Admin admin = new Admin(loginid); admin.Show(); } else { MessageBox.Show("LoginID or Password is incorrect"); txtLogin.Text = ""; txtPassword.Text = ""; } } else { MessageBox.Show("Administrator ID does not exist"); } } }