public void load_data()
{
stt = 1;
string month = thang.Text.ToString();
string year = nam.Text.ToString();
thBus = new ThuocBUS();
ktBus = new KethuocBUS();
List <ThuocDTO> listThuoc = thBus.baocaobymonth(month, year);
List <KethuocDTO> listkethuoc = ktBus.baocaobymonth(month, year);
this.loadData_Vao_GridView(listThuoc, listkethuoc, month, year);
}