public string SaveCategory(Category categoryObj)
        {
            Category acategory = categoryGateway.IsExisted(categoryObj);

            if (acategory == null)
            {
                int row = categoryGateway.SaveCategory(categoryObj);
                if (row > 0)
                {
                    return("Successfully Inserted");
                }
                else
                {
                    return("Insert Failed");
                }
            }
            else
            {
                return("Category Already Existed");
            }
        }