private void btnDelete_Click(object sender, EventArgs e)
{
int id = int.Parse(dgvExam.CurrentRow.Cells["IDch"].Value.ToString());
DanhSachCauHoi ch = (from c in db.DanhSachCauHois
where c.ID_Cauhoi == id && c.MaDe == Made
select c).SingleOrDefault();
db.DanhSachCauHois.DeleteOnSubmit(ch);
db.SubmitChanges();
LoadExam();
}
private void btnAdd_Click(object sender, EventArgs e)
{
int id = int.Parse(dgvListQuestions.CurrentRow.Cells["ID"].Value.ToString());
var check = (from c in db.DanhSachCauHois
where c.MaDe == Made && c.ID_Cauhoi == id
select c).SingleOrDefault();
if (check == null)
{
DanhSachCauHoi ch = new DanhSachCauHoi();
ch.ID_Cauhoi = id;
ch.MaDe = Made;
db.DanhSachCauHois.InsertOnSubmit(ch);
db.SubmitChanges();
LoadExam();
}
else
{
MessageBox.Show("Đã tồn tại câu hỏi trong đề thi");
}
}
