public ApiResult Add([FromBody] ServicePackageModel model)
 {
     db.ServicePackages.Add(new ServicePackage
     {
         Name   = model.Name,
         Price  = model.Price,
         Remark = model.Remark,
     });
     db.SaveChangesAsync();
     return(ApiResult.Ok());
 }
        public ApiResult Change([FromUri] long id, [FromBody] ServicePackageModel model)
        {
            var item = db.ServicePackages.SingleOrDefault(a => a.Id == id);

            if (item == null)
            {
                return(ApiResult.Fail("找不到要删除的服务"));
            }
            item.Name          = model.Name;
            item.Price         = model.Price;
            item.Remark        = model.Remark;
            item.UpdateTime    = DateTime.Now;
            item.SecurityStamp = Guid.NewGuid().ToString();
            db.SaveChangesAsync();
            return(ApiResult.Ok());
        }