private void btnSave_Click(object sender, EventArgs e) { Teacher teacher = new Teacher(); teacher.Name = txtName.Text; teacher.gender = radMale.Checked; teacher.Email = txtEmail.Text; teacher.Address = txtAddress.Text; teacher.Phone = txtPhone.Text; teacher.Dob = dtDOB.Value; if (flag.Equals("add")) { bool isDone = tdb.insertTeacher_Dat(teacher); if (isDone) { MessageBox.Show("Insert done!"); setEnable(false); } } if (flag.Equals("edit")) { teacher.TeacherID = Convert.ToInt32(txtTeacherId.Text); bool isDone = tdb.updateTeacher_Dat(teacher); if (isDone) { MessageBox.Show("Update done!"); setEnable(false); } } groupBox1.Text = "Infor"; loadData(); }