Question

我创建了一个从角度前端调用的web api。当我调试我的Post调用时，它按预期工作，但是当我返回我的＆＃39; newItem＆＃39;它继续在网络XHR日志中说待处理。如果我将OK（newItem）更改为204状态代码，它确实可以正常工作，并且它不会保持挂起状态。任何人有任何想法可能导致这种行为？提前谢谢了。

我的API代码

using DWP.Services.Interfaces;
using DWP.ViewModels;
using System.Web.Http;

namespace DWP.Api
{
    [Authorize()]
    [RoutePrefix("api/teamnewsviews")]
    public class TeamnewsViewsController : ApiController
    {

        ITeamnewsViewsService _teamnewsViewsService;

        public TeamnewsViewsController(ITeamnewsViewsService teamnewsViewsService)
        {
            this._teamnewsViewsService = teamnewsViewsService;
        }


        [HttpGet]
        // GET api/<controller>
        public IHttpActionResult Get(string teamnewsItemId)
        {
           TeamnewsViewsViewModel newsItem = new TeamnewsViewsViewModel();
           var teamNewsItem = _teamnewsViewsService.GetTeamnewsView(teamnewsItemId);

            newsItem.Id = teamNewsItem.Id;
            newsItem.TenantId = teamNewsItem.TenantId;
            newsItem.NewsItemId = teamNewsItem.NewsItemId;
            newsItem.ViewCount = teamNewsItem.ViewCount;

            return Ok(newsItem);
        }


        [HttpPost]
        [ActionName("Increment")]
        public IHttpActionResult Post(string teamnewsItemId)
        {
            if (teamnewsItemId == "")
            {
                return BadRequest("The newsitem Id is invalid");
            }

            var teamNewsItem = _teamnewsViewsService.GetTeamnewsView(teamnewsItemId);

            if (teamNewsItem == null)
            {
                return NotFound();
            }


            var newItem = _teamnewsViewsService.IncrementViewCount(teamNewsItem);



           // var updatedTeamnewsitem = _teamnewsViewsService.GetTeamnewsView(teamnewsItemId);

            return Ok(newItem);


        }

    }
}

我的数据库服务实现：

using DWP.Data.Helpers.Interfaces;
using DWP.Data.Model;
using DWP.Services.Interfaces;
using System.Linq;

namespace DWP.Services
{
    public class TeamnewsViewsService : ITeamnewsViewsService
    {
        private IUnitOfWork _unitOfWork;

        public TeamnewsViewsService(IUnitOfWork uow)
        {
            this._unitOfWork = uow;
        }

        public TeamnewsView GetTeamnewsView(string teamnewsId)
        {
            TeamnewsView teamnewsViews =
                this._unitOfWork
                .GetRepository<TeamnewsView>()
                .GetAll()
                .Where(tnv => tnv.NewsItemId == teamnewsId).FirstOrDefault();

            return teamnewsViews;
        }

        public TeamnewsView IncrementViewCount(TeamnewsView teamnewsView)
        {
            teamnewsView.ViewCount =  teamnewsView.ViewCount + 1;
            this._unitOfWork.Commit();


            var newTeamNewsItem = GetTeamnewsView(teamnewsView.NewsItemId);

            return newTeamNewsItem;
        }

    }
}

Answer 1

事实证明它对另一个表有一个cericular引用错误。我通过制作一个视图模型来修复它，如下面的代码所示。

   TeamnewsViewsViewModel vm = new TeamnewsViewsViewModel();
        var newItem = _teamnewsViewsService.IncrementViewCount(teamNewsItem);
        vm.ViewCount = newItem.ViewCount;

C＃api 2.0 POST始终保持挂起而不是返回数据

1 个答案: