Web Api OData v4 FromODataUri 总是返回 404 Not Found

Question

我正在尝试调用从 uri 接收参数的 Web api odata 控制器方法，如下所示：

    // GET /odata/People(3)
    public SingleResult<Person> Get([FromODataUri] int key)
    {
        return SingleResult.Create(DemoDataSources.Instance.People.Where(p => p.ID == key.ToString()).AsQueryable());
    }

上面的方法没有被 url http://localhost:port/odata/People(3) 总是返回 404 Not Found。

我已经使用以下文件从头开始配置了一个新的 Asp.Net OData Web 应用程序：

PeopleController.cs

[EnableQuery]
public class PeopleController : ODataController
{

    // GET /odata/People
    public IHttpActionResult Get()
    {
        return Ok(DemoDataSources.Instance.People.AsQueryable());
    }

    // GET /odata/People(3)
    public SingleResult<Person> Get([FromODataUri] int key)
    {
        return SingleResult.Create(DemoDataSources.Instance.People.Where(p => p.ID == key.ToString()).AsQueryable());
    }
}

WebApiConfig.cs

public static class WebApiConfig
{
    public static void Register(HttpConfiguration config)
    {
        // Web API configuration and services
        // Configure Web API to use only bearer token authentication.
        config.SuppressDefaultHostAuthentication();
        config.Filters.Add(new HostAuthenticationFilter(OAuthDefaults.AuthenticationType));

        // Web API routes
        config.MapHttpAttributeRoutes();

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

        config.MapODataServiceRoute("odata", "odata", GetEdmModel(), new DefaultODataBatchHandler(GlobalConfiguration.DefaultServer));
        config.EnsureInitialized();
    }

    private static IEdmModel GetEdmModel()
    {
        ODataConventionModelBuilder builder = new ODataConventionModelBuilder();
        builder.Namespace = "Demos";
        builder.ContainerName = "DefaultContainer";
        builder.EntitySet<Person>("People");
        builder.EntitySet<Trip>("Trips");
        var edmModel = builder.GetEdmModel();
        return edmModel;
    }
}

DemoDataSources.cs

public class DemoDataSources
{
    private static DemoDataSources instance = null;
    public static DemoDataSources Instance
    {
        get
        {
            if (instance == null)
            {
                instance = new DemoDataSources();
            }
            return instance;
        }
    }
    public List<Person> People { get; set; }
    public List<Trip> Trips { get; set; }
    private DemoDataSources()
    {
        this.Reset();
        this.Initialize();
    }
    public void Reset()
    {
        this.People = new List<Person>();
        this.Trips = new List<Trip>();
    }
    public void Initialize()
    {
        this.Trips.AddRange(new List<Trip>()
        {
            new Trip()
            {
                ID = "0",
                Name = "Trip 0"
            },
            new Trip()
            {
                ID = "1",
                Name = "Trip 1"
            },
            new Trip()
            {
                ID = "2",
                Name = "Trip 2"
            },
            new Trip()
            {
                ID = "3",
                Name = "Trip 3"
            }
        });
        this.People.AddRange(new List<Person>
        {
            new Person()
            {
                ID = "001",
                Name = "Angel",
                Trips = new List<Trip>{Trips[0], Trips[1]}
            },
            new Person()
            {
                ID = "002",
                Name = "Clyde",
                Description = "Contrary to popular belief, Lorem Ipsum is not simply random text.",
                Trips = new List<Trip>{Trips[2], Trips[3]}
            },
            new Person()
            {
                ID = "003",
                Name = "Elaine",
                Description = "It has roots in a piece of classical Latin literature from 45 BC, making Lorems over 2000 years old."
            }
        });
    }
}

Person.cs

public class Person
{
    [Key]
    public String ID { get; set; }
    [Required]
    public String Name { get; set; }
    public String Description { get; set; }
    public List<Trip> Trips { get; set; }
}

Trip.cs

public class Trip
{
    [Key]
    public String ID { get; set; }
    [Required]
    public String Name { get; set; }
}

我 "think" 这个问题与 odata 路由有关，但我不知道为什么这种基本行为无法正常工作...

感谢任何帮助！马科斯

Answer 1

由于 Person class 的键属性的 string 类型，您需要对路由中的 ID 使用单引号：http://localhost:port/odata/People('3')

Answer 2

如果您按照 Andriy 的建议传递字符串值，您可能还需要更改 get 的签名。

所以改变： public SingleResult Get([FromODataUri] int key)

收件人： public SingleResult Get([FromODataUri] 字符串键)

然后我认为您可以按照 Andriy 的建议调用 OData 服务。

Web Api OData v4 FromODataUri 总是返回 404 Not Found

Web Api OData v4 FromODataUri always returning 404 Not Found

asp.net-web-api

odata

asp.net-web-api-odata