public ParameterEntity Update (ParameterEntity entity)
		{
			try
            {
                _parameterRepository.Update(entity);
                return entity;
            }
            catch (Exception e)
            {
				_log.Error(e,"数据库操作出错");
                return null;
            }
		}
		public bool Delete(ParameterEntity entity)
		{
			try
            {
                _parameterRepository.Delete(entity);
                return true;
            }
            catch (Exception e)
            {
				_log.Error(e,"数据库操作出错");
                return false;
            }
		}
        /// <summary>
        /// 添加参数
        /// </summary>
        /// <param name="model"></param>
        /// <returns></returns>
		public HttpResponseMessage Post(ParameterModel model)
		{
            if(String.IsNullOrEmpty(model.Name) || model.Id==0)
            {
               return PageHelper.toJson(PageHelper.ReturnValue(false, "数据异常!")); 
            }
            
			var entity = new ParameterEntity
			{
                Category = _categoryService.GetCategoryById(model.Id),//添加时候 这里的Id传的是分类ID         
				Name = model.Name,
				Sort = model.Sort,				
				AddTime =DateTime.Now,
                UpdTime =DateTime.Now,
			};
			if(_parameterService.Create(entity).Id > 0)
			{
                return PageHelper.toJson(PageHelper.ReturnValue(true, "添加成功!"));
			}
            return PageHelper.toJson(PageHelper.ReturnValue(false, "添加失败!")); 
		}