protected void cmbNhomHang_SelectedIndexChanged1(object sender, EventArgs e)
{
if (Int32.Parse(cmbNhomHang.Value + "") == -1)
{
dataHangHoa dtHH = new dataHangHoa();
DataTable daHH = dtHH.LayDanhSachHangHoa_Ten();
daHH.Rows.Add(-1, "Tất cả hàng hóa");
cmbHangHoa.DataSource = daHH;
cmbHangHoa.TextField = "TenHangHoa";
cmbHangHoa.ValueField = "ID";
cmbHangHoa.DataBind();
cmbHangHoa.SelectedIndex = daHH.Rows.Count;
}
else
{
dataHangHoa dtHH = new dataHangHoa();
DataTable daHH = dtHH.LayDanhSachHangHoa_IDNhom(cmbNhomHang.Value + "");
daHH.Rows.Add(-1, "Tất cả hàng hóa");
cmbHangHoa.DataSource = daHH;
cmbHangHoa.TextField = "TenHangHoa";
cmbHangHoa.ValueField = "ID";
cmbHangHoa.DataBind();
cmbHangHoa.SelectedIndex = daHH.Rows.Count;
}
}
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
dataNhomHang dtNhomH = new dataNhomHang();
DataTable daNhomH = dtNhomH.getDanhSachNhomHang2();
daNhomH.Rows.Add(-1, "Tất cả nhóm hàng");
cmbNhomHang.DataSource = daNhomH;
cmbNhomHang.TextField = "TenNhomHang";
cmbNhomHang.ValueField = "ID";
cmbNhomHang.DataBind();
cmbNhomHang.SelectedIndex = daNhomH.Rows.Count;
dataHangHoa dtHH = new dataHangHoa();
DataTable daHH = dtHH.LayDanhSachHangHoa_Ten();
daHH.Rows.Add(-1, "Tất cả hàng hóa");
cmbHangHoa.DataSource = daHH;
cmbHangHoa.TextField = "TenHangHoa";
cmbHangHoa.ValueField = "ID";
cmbHangHoa.DataBind();
cmbHangHoa.SelectedIndex = daHH.Rows.Count;
}
}