public JsonResult Display()
        {
            ProductCategoryDAL     ProdCatObj = new ProductCategoryDAL();
            List <ProductCategory> catlist    = new List <ProductCategory>();

            try
            {
                var result = ProdCatObj.getAllProductCategory();
                foreach (var obj in result)
                {
                    ProductCategory cat = new ProductCategory();
                    cat.CategoryId   = obj.CategoryId;
                    cat.CategoryName = obj.CategoryName;
                    catlist.Add(cat);
                }
                return(Json(catlist));
            }
            catch (Exception)
            {
                return(null);
            }
        }