private void MainMenuButton_Click(object sender, EventArgs e) { TeacherMainMenu tmm = new TeacherMainMenu(); this.Hide(); tmm.Show(); }
private void SignInbutton_Click(object sender, EventArgs e) { if (StudentLoginradioButton.Checked) { if (UsernametextBox.Text != null && PasswardtextBox.Text != null) { try { Connection obj = new Connection(); obj.con.ConnectionString = obj.locate; obj.con.Open(); SqlDataAdapter adapter = new SqlDataAdapter("Select COUNT (*) FROM Students where Username ='******' and Passward ='" + PasswardtextBox.Text + "'", obj.con); DataTable dt = new DataTable(); adapter.Fill(dt); if (dt.Rows[0][0].ToString() == "1") { StudentMainMenu smm = new StudentMainMenu(); this.Hide(); smm.Show(); } else { MessageBox.Show("Username or Passward is incorrect"); } obj.con.Close(); } catch (Exception ex) { MessageBox.Show(ex.Message); } } } if (TeacherLoginradioButton.Checked) { if (UsernametextBox.Text != null && PasswardtextBox.Text != null) { try { Connection obj = new Connection(); obj.con.ConnectionString = obj.locate; obj.con.Open(); SqlDataAdapter adapter = new SqlDataAdapter("Select COUNT (*) FROM Teachers where Username ='******' and Passward ='" + PasswardtextBox.Text + "'", obj.con); DataTable dt = new DataTable(); adapter.Fill(dt); if (dt.Rows[0][0].ToString() == "1") { TeacherMainMenu tmm = new TeacherMainMenu(); this.Hide(); tmm.Show(); } else { MessageBox.Show("Username or Passward is incorrect"); } obj.con.Close(); } catch (Exception ex) { MessageBox.Show(ex.Message); } } } }