//----------Hiện sản phẩm theo id sản phẩm--------------
    private void HienSanPham()
    {
        MOONLY.Common.SanPham Spham = new MOONLY.Common.SanPham();
        Spham.Idsanpham = int.Parse(Request.QueryString["Idsanpham"]);
        XuLyLaySanPhamByID laySanPhamByID = new XuLyLaySanPhamByID();

        laySanPhamByID.Sanpham = Spham;
        try
        {
            laySanPhamByID.Thucthi();
            txtTenSanPham.Text       = laySanPhamByID.Sanpham.Ten;
            CKEditorControlMoTa.Text = laySanPhamByID.Sanpham.Mota;
            textGia.Text             = laySanPhamByID.Sanpham.Giasanpham.ToString();
            imgHinhSanPham.ImageUrl  = "../HienThiHinhSanPham.ashx?Idhinhsanpham=" +
                                       laySanPhamByID.Sanpham.Idhinhsanpham.ToString();
            dropDanhMucSanPham.SelectedIndex =
                dropDanhMucSanPham.Items.IndexOf(dropDanhMucSanPham.Items.FindByText(
                                                     laySanPhamByID.Sanpham.Danhmucsanpham.Tendanhmucsanpham));
            LuuTamIdHinhSanPham = laySanPhamByID.Sanpham.Idhinhsanpham;
        }
        catch
        {
            Response.Redirect("../Trangloi.aspx");
        }
    }
 //---------------Cập nhật thay đổi sản phẩm--------------------
 protected void btnCapNhat_Click(object sender, EventArgs e)
 {
     if (IsValid)
     {
         MOONLY.Common.SanPham Spham = new MOONLY.Common.SanPham();
         Spham.Idsanpham        = int.Parse(Request.QueryString["IDsanpham"]);
         Spham.Ten              = txtTenSanPham.Text;
         Spham.Mota             = CKEditorControlMoTa.Text;
         Spham.Giasanpham       = Convert.ToDecimal(textGia.Text);
         Spham.Iddanhmucsanpham = int.Parse(
             dropDanhMucSanPham.SelectedItem.Value);
         Spham.Idhinhsanpham = LuuTamIdHinhSanPham;
         if (fileuploadHinhSanPham.HasFile)
         {
             Spham.Dulieuhinhsanpham = fileuploadHinhSanPham.FileBytes;
         }
         else
         {
             XuLyLayHinhSanPham XuLyLayHinh = new XuLyLayHinhSanPham();
             XuLyLayHinh.Sanpham = Spham;
             try
             {
                 XuLyLayHinh.Thucthi();
             }
             catch
             {
                 Response.Redirect("../Trangloi.aspx");
             }
             SqlDataSource src = new SqlDataSource();
             src = XuLyLayHinh.Ketqua;
             DataView view = (DataView)src.Select(DataSourceSelectArguments.Empty);
             Spham.Dulieuhinhsanpham = (byte[])view[0]["DuLieuHinhSanPham"];
         }
         XuLyCapNhatSanPham capnhatsanpham = new XuLyCapNhatSanPham();
         capnhatsanpham.Sanpham = Spham;
         try
         {
             capnhatsanpham.Thucthi();
         }
         catch
         {
             Response.Redirect("../Trangloi.aspx");
         }
         Response.Redirect("SanPham.aspx");
     }
 }
 protected void btnCapNhat_Click(object sender, EventArgs e)
 {
     if (IsValid)
     {
         XuLyThemSanPham       themsanpham = new XuLyThemSanPham();
         MOONLY.Common.SanPham Spham       = new MOONLY.Common.SanPham();
         Spham.Iddanhmucsanpham = int.Parse(dropDanhMucSanPham.SelectedItem.Value);
         Spham.Ten  = txtTenSanPham.Text;       // txtTenSanPham là ID của TextBox
         Spham.Mota = CKEditorControlMoTa.Text; //txtTenSanPham là ID của TextBox
         Spham.Dulieuhinhsanpham = fileuploadHinhSanPham.FileBytes;
         // fileuploadHinhSanPham là ID của điều khiển FileUpLoad
         Spham.Giasanpham    = Convert.ToDecimal(txtGia.Text); // txtGia là ID của TextBox
         themsanpham.Sanpham = Spham;
         try
         {
             themsanpham.Thucthi();
         }
         catch
         {
             Response.Redirect("../Trangloi.aspx");
         }
         Response.Redirect("SanPham.aspx");
     }
 }