void Showcb()
{
DropDownList1.DataSource = L.ShowCategory();
DropDownList1.DataTextField = "CategoryName";
DropDownList1.DataValueField = "CategoryID";
DataBind();
}
public void loadloai()
{
ddrMaloai.DataSource = bus.ShowCategory();
ddrMaloai.DataTextField = "CategoryName";
ddrMaloai.DataValueField = "CategoryID";
ddrMaloai.DataBind();
}
public void LoadDrop()
{
DropDownList1.DataSource = bus.ShowVendor();
DropDownList1.DataTextField = "VendorName";
DropDownList1.DataValueField = "VendorID";
DropDownList1.DataBind();
DropDownList2.DataSource = bus.ShowCategory();
DropDownList2.DataTextField = "CategoryName";
DropDownList2.DataValueField = "CategoryID";
DropDownList2.DataBind();
}