private void btn_Start_Click(object sender, EventArgs e) { if (dgv_Results.SelectedRows == null && dgv_Results.Rows.Count > 0) { dgv_Results.Rows[0].Selected = true; } DataGridViewRow gridView = dgv_Results.SelectedRows[0]; TestInfo testInfo = new TestInfo() { CourseCode = cmb_Course.SelectedValue.ToString(), CourseName = cmb_Course.Text, StudentCode = lbl_StudentCode.Text, StudentName = lbl_StudentName.Text, TimesStep = int.Parse(gridView.Cells[5].Value.ToString()), TotalTime = int.Parse(gridView.Cells[7].Value.ToString()), DateExam = Convert.ToDateTime(gridView.Cells[4].Value), ClassName = lbl_ClassName.Text, listQuestion = GetListQuestion() }; if (Program.mGroup.Equals("SINHVIEN")) { if (SqlRequestFunction.HasBeenExamined(testInfo.StudentCode, testInfo.CourseCode, testInfo.TimesStep)) { MessageBox.Show("Bạn đã thi môn này rồi. Vui lòng kiểm tra lại thông tin." , "Đã kiểm tra." , MessageBoxButtons.OK , MessageBoxIcon.Information); return; } } TestExam testExam = new TestExam(testInfo); testExam.ShowDialog(); }