private void materialFlatButton4_Click(object sender, EventArgs e) { Course course = new Course(); course.name = txtCourseName.Text; course.months = Convert.ToDecimal(txtCourseMont.Text); course.price = Convert.ToDecimal(txtCoursePrice.Text); course.type = Convert.ToInt32(cbbType.SelectedValue); courseDAO.create(course); cbbType.SelectedIndex = -1; GetSource.getTableSource(CourseDAO.READ_ALL, dgvCourse); MessageBox.Show("Created", "Success", MessageBoxButtons.OK, MessageBoxIcon.Information); Diary dia = new Diary(); dia.account = curent.id; dia.date = DateTime.Today; dia.description = "Create new course " + course.name; diaryDAO.create(dia); GetSource.getTableSource(DiaryDAO.READ_ALL, dgvLog); }