protected void BtnThem_Click(object sender, EventArgs e)
        {
            FoodType f = new FoodType();

            if (!f.exist(txtName.Text))
            {
                f.Type_name = txtName.Text;
                f.Type_post = Convert.ToInt32(txtPost.Text);
                int lastIndex = hfImgReview.Value.LastIndexOf("/");
                f.Type_img = hfImgReview.Value.Substring(lastIndex + 1).ToString();

                f.Status   = Convert.ToInt32(ddlStatus.SelectedValue);
                f.Username = Session["username"].ToString();
                if (f.add())
                {
                    lblMessage.Text = "Thêm Thành Công";
                    ScriptManager.RegisterStartupScript(this, this.GetType(), "Pop", "showModal();", true);
                    Btn_cancel_Click(sender, e);
                }
                else
                {
                    Response.Write("<script>alert('Thất Bại') </script>");
                }
            }
            else
            {
                lblMessage.Text = "Đã Tồn Tại";
                ScriptManager.RegisterStartupScript(this, this.GetType(), "Pop", "showModal();", true);
            }
        }