private void btapply_Click(object sender, RoutedEventArgs e)
        {
            using (var db = new QuanLyNongSanDBEntities())
            {
                this.IsEnabled = false;
                var creen = new ConfirmWindow($"Ban Co Chac Muon Edit San Phan {item.Id}");
                creen.ShowDialog();
                if (creen.DialogResult == true)
                {
                    var result = db.Products.SingleOrDefault(b => b.Id == it.Id);
                    if (result != null)
                    {
                        try
                        {
                            result.Name = it.Name;
                            result.Gia  = it.Gia;
                            string pathDelete;
                            if (destinationPath != it.Image)
                            {
                                pathDelete = destinationPath;
                                //Đường Dẫn File Ảnh Gốc
                                var sourceImageFileInfo = new FileInfo(it.Image);

                                //Tao ten duy nhat
                                var uniqueName = $"{Guid.NewGuid()}{sourceImageFileInfo.Extension}";


                                //Đường dẫn tập tin exe
                                var baseDirectory = AppDomain.CurrentDomain.BaseDirectory;

                                //Đường dẫn folder Image trong file exe
                                destinationPath = $"{baseDirectory}Image_Product\\{uniqueName}";

                                //Copy Ảnh từ File Ảnh Gốc Sang Folder Ảnh Trong File Exe
                                if (!File.Exists(destinationPath))
                                {
                                    File.Copy(it.Image, destinationPath);
                                }
                                result.Image = uniqueName;
                                item.Image   = uniqueName;
                            }
                            db.SaveChanges();
                        }
                        catch (Exception ex)
                        {
                            MessageBox.Show(ex.Message);
                        }
                    }
                    item.Equal(it);
                    it.Image          = destinationPath;
                    stpShow.Height    = stpEdit.Height;
                    stpEdit.Height    = 0;
                    btedit.Content    = "Edit";
                    btapply.IsEnabled = false;
                }
                this.IsEnabled = true;
            }
        }
 private void btdelete_Click(object sender, RoutedEventArgs e)
 {
     using (var db = new QuanLyNongSanDBEntities())
     {
         this.IsEnabled = false;
         var creen = new ConfirmWindow($"Ban Co Chac Muon Xoa San Phan {item.Id}");
         creen.ShowDialog();
         if (creen.DialogResult == true)
         {
             var itemdelete = db.Products.Find(item.Id);
             db.Products.Remove(itemdelete);
             db.SaveChanges();
             this.Close();
         }
         this.IsEnabled = true;
     }
 }
        private void btdelete_Click(object sender, RoutedEventArgs e)
        {
            using (var db = new QuanLyNongSanDBEntities())
            {
                this.IsEnabled = false;
                var creen = new ConfirmWindow($"Ban Co Chac Muon Xoa Hoa Don {HD.Id}");
                creen.ShowDialog();
                if (creen.DialogResult == true)
                {
                    foreach (var CT in HD.InvoiceDetails)
                    {
                        var dele = db.InvoiceDetails.Find(CT.Id);
                        db.InvoiceDetails.Remove(dele);
                        db.SaveChanges();
                    }

                    var itemdelete = db.Invoices.Find(HD.Id);
                    db.Invoices.Remove(itemdelete);
                    db.SaveChanges();
                    this.Close();
                }
                this.IsEnabled = true;
            }
        }
        private async void btadd_Click(object sender, RoutedEventArgs e)
        {
            if (tbtenkh.Text == "")
            {
                MessageBox.Show("Tên Khách Hàng Không Được Trống");
                return;
            }
            else if (tbdiachi.Text == "")
            {
                MessageBox.Show("Địa Chỉ Khách Hàng Không Được Trống");
                return;
            }
            else if (tbsdt.Text == "")
            {
                MessageBox.Show("SĐT Khách Hàng Không Được Trống");
                return;
            }
            else if (tblngaydat.Text == "")
            {
                MessageBox.Show("Ngay Đạt Không Được Trống");
                return;
            }
            else if (view.Count == 0)
            {
                MessageBox.Show("Hóa Đơn Phải Có Ít Nhất 1 SP");
                return;
            }
            using (var db = new QuanLyNongSanDBEntities())
            {
                this.IsEnabled = false;
                var creen = new ConfirmWindow($"Ban Co Chac Muon Edit Hoa Don {HD.Id}");
                creen.ShowDialog();
                if (creen.DialogResult == true)
                {
                    var result = db.Invoices.SingleOrDefault(b => b.Id == HD.Id);
                    if (result != null)
                    {
                        result.TenKH    = tbtenkh.Text;
                        result.DiaChiKH = tbdiachi.Text;
                        result.SDT      = tbsdt.Text;
                        UpdateStatus(result);
                        result.TongTien = double.Parse(tbltongtienhoadon.Text);
                        foreach (var CT in result.InvoiceDetails)
                        {
                            foreach (var ct in view)
                            {
                                if (ct.Id == CT.Id && CT.SoLuong != ct.SoLuong)
                                {
                                    CT.SoLuong = ct.SoLuong;
                                    CT.TinhTongGia();
                                }
                            }
                        }
                        foreach (var CT in insert)
                        {
                            InvoiceDetail newDetail = new InvoiceDetail()
                            {
                                IdInvoice = CT.IdInvoice,
                                IdProduct = CT.IdProduct,
                                SoLuong   = CT.SoLuong,
                                TongTien  = CT.TongTien,
                                GiaBan    = CT.GiaBan,
                            };
                            result.InvoiceDetails.Add(newDetail);
                            await db.SaveChangesAsync();
                        }
                        foreach (var delete in delete)
                        {
                            var dele = db.InvoiceDetails.Find(delete.Id);
                            db.InvoiceDetails.Remove(dele);
                            await db.SaveChangesAsync();
                        }
                    }
                    db.SaveChanges();
                }
                this.IsEnabled = true;
            }

            var dba = new QuanLyNongSanDBEntities();

            HD = dba.Invoices.Find(HD.Id);
            datagridgiohang.ItemsSource = HD.InvoiceDetails.ToList();

            stackpanelshow.Height = stackpaneledit.Height;
            this.Width            = 800;
            stackpaneledit.Height = 0;
            btedit.Content        = "Edit";
            btapply.IsEnabled     = false;

            DataContext = null;
            DataContext = HD;
        }