public GioHang AddItem(int id, int idgh, int soluong)
{
GioHang gioHang = context.GioHangs.Find(idgh);
SanPhamGioHang spgh = Check(id, idgh);
if (spgh != null)
{
spgh.SoLuong += soluong;
gioHang.SanPhamGioHangs.Add(spgh);
}
else
{
SanPham sp = context.SanPhams.Find(id);
spgh = new SanPhamGioHang();
spgh.IDGH = idgh;
spgh.IDSP = id;
spgh.SoLuong = soluong;
spgh.DonGia = sp.Gia;
spgh.ThanhTien = soluong * sp.Gia;
spgh.GhiChu = "";
context.SanPhamGioHangs.Add(spgh);
}
decimal thanhTien = 0;
foreach (SanPhamGioHang sp in gioHang.SanPhamGioHangs)
{
thanhTien += sp.ThanhTien ?? 0;
}
gioHang.TongTien = thanhTien;
context.SaveChanges();
return(gioHang);
}
public string ChangeItem(int id, int idgh, int soluong)
{
if (soluong > 0)
{
SanPhamGioHang spgh = context.SanPhamGioHangs.Where(a => a.IDSP == id && a.IDGH == idgh).FirstOrDefault();
spgh.SoLuong = soluong;
spgh.ThanhTien = soluong * spgh.DonGia;
context.SaveChanges();
GioHang gioHang = context.GioHangs.Where(a => a.ID == idgh).FirstOrDefault();
decimal thanhTien = 0;
foreach (SanPhamGioHang sp in gioHang.SanPhamGioHangs)
{
thanhTien += sp.ThanhTien ?? 0;
}
gioHang.TongTien = thanhTien;
context.SaveChanges();
return(String.Format(@"{{""TongTien"":{0}, ""ThanhTien"":{1}}}", gioHang.TongTien, spgh.ThanhTien));
}
else
{
SanPhamGioHang spgh = context.SanPhamGioHangs.Where(a => a.IDSP == id && a.IDGH == idgh).FirstOrDefault();
context.SanPhamGioHangs.Remove(spgh);
GioHang gioHang = context.GioHangs.Where(a => a.ID == idgh).FirstOrDefault();
decimal thanhTien = 0;
foreach (SanPhamGioHang sp in gioHang.SanPhamGioHangs)
{
thanhTien += sp.ThanhTien ?? 0;
}
gioHang.TongTien = thanhTien;
context.SaveChanges();
return(String.Format(@"{{""TongTien"":{0}}}", gioHang.TongTien));
}
}
public SanPhamGioHang Check(int id, int idgh)
{
SanPhamGioHang spgh = context.SanPhamGioHangs.Where(x => x.IDSP == id && x.IDGH == idgh).FirstOrDefault();
if (spgh != null)
{
return(spgh);
}
else
{
return(null);
}
}