protected void btnLuu_Click(object sender, EventArgs e)
        {
            
            DTOCongNoVatLieu dtovl = new DTOCongNoVatLieu();
            dtovl.MaPDVLCC = int.Parse(lbMPD.Text);
            dtovl.MaNCC = int.Parse(lbNCC.Text);
            dtovl.MaNV = int.Parse(TextBox1.Text);
            dtovl.NgayTraNo = Convert.ToDateTime(lbNTT.Text);
            dtovl.Sotien = int.Parse(TextBox2.Text);

            DAO_Entity dao = new DAO_Entity();
            dao.ThemCongNoNCC(dtovl);


            DTOPhieuDatVatLieuCC dtopd = new DTOPhieuDatVatLieuCC();
            dtopd.MaPDVLCC = lbMPD.Text;
            int tong = int.Parse(lbTong.Text);
            int no = int.Parse(TextBox2.Text);
            dtopd.CongNoNCC = tong - no;
            dao.CapNhatCongNoNCC(dtopd);

            Response.Redirect("~/QLBoPhan_VatLieu/QLCongNoNCC/DanhSachCongNo.aspx");
        }