private void TeacherCourseForm_Load(object sender, EventArgs e) { clsTeacherCourse objTeacherCourse = new clsTeacherCourse(); ComboBox[] cmb = new ComboBox[] { cmbTeacherID, cmbTeacherName, cmbCourseID, cmbCourseName }; objTeacherCourse.Load(cmb); objTeacherCourse.ViewAll(dgvTeacherCourse); }