Question

使用John Papas的SPA教程访问SQL Server Compact DB。当我使用URL访问应用程序中的扬声器列表时，它会抛出404错误。我已经尝试通过再次浏览教程视频来解决过去一小时的问题，但我没有运气。

本教程让我通过以下URL访问：localhost：xxxxx / api / speakers。

因此，我的URL看起来像这样：localhost：12345 / api / speakers

 Error message: {"message":"No HTTP resource was found that matches the request URI 'http://localhost:49357/api/speakers'.","messageDetail":"No type was found that matches the controller named 'speakers'."}

speakers.html位于App文件夹中。

这是我在App_Start下的WebApiConfig.cs：

 using System.Web.Http;
 using Newtonsoft.Json.Serialization;

 namespace CodeCamper
 {
     public static class WebApiConfig
 {
    public static void Register(HttpConfiguration config)
    {
        Configure(config);

        config.Routes.MapHttpRoute(
            name: "DefaultApi",
            routeTemplate: "api/{controller}/{id}",
            defaults: new { id = RouteParameter.Optional }
        );
    }

    private static void Configure(HttpConfiguration config)
    {
        config.Formatters.Remove(config.Formatters.XmlFormatter);
        var json = config.Formatters.JsonFormatter;
        json.SerializerSettings.ContractResolver =
            new CamelCasePropertyNamesContractResolver();
    }
}}

这是教程提供的SpeakersController：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;

namespace CodeCamper.Controllers
{
    public class SpeakersController
    {
    // GET api/speakers
    public IEnumerable<object> Get()
    {
        var ctx = new CodeCamperDbContext();
        var query = ctx.Set<Session>()
            .Select(session => session.Speaker)
            .Distinct().Select(s =>
                new
                    {
                        Id = s.Id,
                        FirstName = s.FirstName,
                        LastName = s.LastName,
                        ImageSource = s.ImageSource,
                    });
        return query;
    }
}
}

任何想法我做错了什么？提前谢谢。

Answer 1

您必须从SpeakersController

继承ApiController

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;

namespace CodeCamper.Controllers
{
  public class SpeakersController: System.Web.Http.ApiController // <-- here it is
  {
    // GET api/speakers
    public IEnumerable<object> Get()
    {
      var ctx = new CodeCamperDbContext();
      var query = ctx.Set<Session>()
          .Select(session => session.Speaker)
          .Distinct().Select(s =>
              new
                  {
                      Id = s.Id,
                      FirstName = s.FirstName,
                      LastName = s.LastName,
                      ImageSource = s.ImageSource,
                  });
      return query;
    }
  }
}

Answer 2

从SpeakersController

继承ApiController

public class SpeakersController : System.Web.Http.ApiController
{
   //your code
}

并添加

在HttpRoute("api/speakers")

之后的控制器定义之前添加// GET api/speakers

Visual Studio 2012路由模板无法正常工作

2 个答案: