public bool ThemCTPN(int mapn, int masp, int soluong)
 {
     try
     {
         SanPham sp = this.db1.SanPhams.First(p => p.MaSP == masp);
         WFCTPhieuNhap pn = new WFCTPhieuNhap();
         pn.MaPN = mapn;
         pn.MaSP = masp;
         pn.SoLuong = soluong;
         //-----
         int c = int.Parse(pn.SoLuong.ToString());
         int b = 0;
         b = int.Parse(sp.SoLuong) + c;
         sp.SoLuong = b.ToString();
         //-----
         db1.SaveChanges();
         db.WFCTPhieuNhaps.Add(pn);
         db.SaveChanges();
         return true;
     }
     catch
     {
         return false;
     }
 }
 public bool ThemCTPN(int mapn, int masp, int soluong)
 {
     try
     {
         SanPham       sp = this.db1.SanPhams.First(p => p.MaSP == masp);
         WFCTPhieuNhap pn = new WFCTPhieuNhap();
         pn.MaPN    = mapn;
         pn.MaSP    = masp;
         pn.SoLuong = soluong;
         //-----
         int c = int.Parse(pn.SoLuong.ToString());
         int b = 0;
         b          = int.Parse(sp.SoLuong) + c;
         sp.SoLuong = b.ToString();
         //-----
         db1.SaveChanges();
         db.WFCTPhieuNhaps.Add(pn);
         db.SaveChanges();
         return(true);
     }
     catch
     {
         return(false);
     }
 }