protected void LoadMaHoa()
{
drDonViBH.DataSource = dv.DSDVMaHoa();
drDonViBH.DataTextField = "MaHoa";
drDonViBH.DataValueField = "ID_DonVi";
drDonViBH.DataBind();
}
void loadMaHoa()
{
DataTable dt = new DataTable();
dt = dv.DSDVMaHoa();
drDonViBH.DataSource = dt;
drDonViBH.DataValueField = "ID_DonVi";
drDonViBH.DataTextField = "MaHoa";
drDonViBH.DataBind();
}