如何通过存储过程和 EF db 优先方法 post Web api 中的数据

Question

我在我的网络 API 项目中 posting 数据时遇到问题，我有一个操作方法和一个存储过程以及一个 table 想要执行 post 操作，但是当我 post 从 fiddler 我的 table 结构中获取数据时，我收到内部服务器错误消息

 public partial class tblImage
    {
        public string ImageId { get; set; }
        public string ImagePath { get; set; }
        public string ImageCategory { get; set; }
    }

我Visual studio制作的存储过程代码如下

 public virtual int InsertDynamicImage(string imageId, string imagePath, string imageCategory)
        {
            var imageIdParameter = imageId != null ?
                new ObjectParameter("ImageId", imageId) :
                new ObjectParameter("ImageId", typeof(string));

            var imagePathParameter = imagePath != null ?
                new ObjectParameter("ImagePath", imagePath) :
                new ObjectParameter("ImagePath", typeof(string));

            var imageCategoryParameter = imageCategory != null ?
                new ObjectParameter("ImageCategory", imageCategory) :
                new ObjectParameter("ImageCategory", typeof(string));

            return ((IObjectContextAdapter)this).ObjectContext.ExecuteFunction("InsertDynamicImage", imageIdParameter, imagePathParameter, imageCategoryParameter);
        }
    }

我的控制器代码如下

 [HttpPost]
        [Route("api/tblProducts/DynamicImage")]
        public IHttpActionResult AddDynamic(tblImage Review)
        {
            if (!ModelState.IsValid)
            {
                return BadRequest(ModelState);
            }

            var AltAddress = db.InsertDynamicImage(Review.ImageId, Review.ImagePath, Review.ImageCategory);


            return CreatedAtRoute("DefaultApi", new { id = Review.ImageId }, Review);

        }

fiddler 给出的错误信息如下所示

{
    "Message":"An error has occurred.",
    "ExceptionMessage":"UrlHelper.Link must not return null.",
    "ExceptionType":"System.InvalidOperationException",
    "StackTrace":"   at System.Web.Http.Results.CreatedAtRouteNegotiatedContentResult`1.Execute()\r\n
at System.Web.Http.Results.CreatedAtRouteNegotiatedContentResult`1.ExecuteAsync(CancellationToken cancellationToken)\r\n
at System.Web.Http.Controllers.ApiControllerActionInvoker.<InvokeActionAsyncCore>d__0.MoveNext()\r\n
--- End of stack trace from previous location where exception was thrown ---\r\n
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)\r\n
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)\r\n
at System.Web.Http.Controllers.ActionFilterResult.<ExecuteAsync>d__2.MoveNext()\r\n
--- End of stack trace from previous location where exception was thrown ---\r\n
at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)\r\n
at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)\r\n
at System.Web.Http.Dispatcher.HttpControllerDispatcher.<SendAsync>d__1.MoveNext()"
}

Answer 1

尝试命名您的属性路由。

[Route("api/tblProducts/DynamicImage", name="GetProductImage")]

然后在调用link时使用路由名称。

如果您想了解更多信息，请查看文档 here。

更新澄清一下，您需要在对 CreatedAtRoute 的调用中使用路由名称。像这样：

return CreatedAtRoute("GetProductImage", new { id = Review.ImageId }, Review);

如果还是不行，你能post你的路由配置吗？

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