protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
CAYQDEntities entitiesCayQD = new CAYQDEntities();
var cauHoi = entitiesCayQD.CAUHOI.FirstOrDefault(q => q.LANUTGOC == true);
blCauHoi.Text = cauHoi.CAUHOI1.ToString();
var cauTraLoi = entitiesCayQD.CAUTRALOI.Where(q => q.ID_CAUHOI == cauHoi.ID);
bxTraLoi.DataSource = cauTraLoi.ToList();
bxTraLoi.DataTextField = "CAUTRALOI1";
bxTraLoi.DataValueField = "ID";
bxTraLoi.RepeatColumns = 1;
bxTraLoi.DataBind();
}
}
protected void cbxTraLoi_SelectedIndexChanged(object sender, EventArgs e)
{
int idCauTraLoiChon = Convert.ToInt32(bxTraLoi.SelectedItem.Value);
CAYQDEntities entitiesCayQD = new CAYQDEntities();
var cauHoi = entitiesCayQD.CAUHOI.FirstOrDefault(q => q.ID_CAUTRALOI == idCauTraLoiChon);
if (cauHoi != null)
{
blCauHoi.Text = cauHoi.CAUHOI1.ToString();
var cauTraLoi = entitiesCayQD.CAUTRALOI.Where(q => q.ID_CAUHOI == cauHoi.ID);
bxTraLoi.DataSource = cauTraLoi.ToList();
bxTraLoi.DataTextField = "CAUTRALOI1";
bxTraLoi.DataValueField = "ID";
bxTraLoi.DataBind();
}
else //là nút lá
{
string nganhNghe = entitiesCayQD.CAUTRALOI.FirstOrDefault(q => q.ID == idCauTraLoiChon).NGANHHOC.TENNGANH;
blCauHoi.Text = "Kết quả: Bạn nên chọn ngành [" + nganhNghe.ToUpper() + "]";
bxTraLoi.Items.Clear();
}
}