Question

我正在尝试将API控制器添加到MVC5应用程序中。但是我收到错误＆＃34; RouteData必须包含一个名为＆＃39; action＆＃39;使用非空字符串值。＆＃34;当我导航到路线时：http://localhost/DataAPI/Community/Get/

应用程序似乎并不想识别API控制器 - 如果我将操作添加到路由默认值，我会收到404错误。当我用标准控制器替换它（并将默认操作添加到路由数据）时，我可以获取数据。我错过了什么吗？

控制器位于Controllers / DataAPI子目录中：

using System.Web.Http;
using System.Net.Http;

namespace ERP.Controllers.DataAPI
{
  public class CommunityController : ApiController
  {
    PCSEntities db = new PCSEntities();

    public IEnumerable<Community> Get(Guid ApiKey)
    {
        return db.Communities.AsNoTracking().Take(10);
    }
  }
}

这是我的路线配置：

public class RouteConfig
{
    public static void RegisterRoutes(RouteCollection routes)
    {
        routes.IgnoreRoute("{resource}.axd/{*pathInfo}");

        #region DataAPI

        var ns = new[] { "ERP.Controllers.DataAPI" };
        routes.MapRoute(
            name: "DataAPI",
            url: "DataAPI/{controller}/{ApiKey}/{id}",
            defaults: new {  ApiKey = Guid.Empty, id = UrlParameter.Optional },
            namespaces: ns
        );
        #endregion

        routes.MapRoute(
            name: "Default",
            url: "{controller}/{action}/{id}",
            defaults: new { controller = "Home", action = "Index", id = UrlParameter.Optional }
        );
    }
}

Answer 1

尝试在RouteConfig中替换您的路线，如下所示：

routes.MapHttpRoute(
    name: "DataAPI",
    routeTemplate: "DataAPI/{controller}/{ApiKey}/{id}",
    defaults: new { ApiKey = Guid.Empty, id = UrlParameter.Optional }
);

此外，使用Web API时，不应显式调用Get方法。

因此，在您的情况下，您可以将GUID作为参数传递，如下所示： http://localhost/DataAPI/Community/6c4058a6-7edb-46c0-9d81-1c508c729f5b

Answer 2

查看以下教程

Routing in ASP.NET Web API

using System.Web.Http;
using System.Net.Http;

namespace ERP.Controllers.DataAPI
{
  public class CommunityController : ApiController
  {
    PCSEntities db = new PCSEntities();

    public IEnumerable<Community> GetCommunities(Guid ApiKey)
    {
        return db.Communities.AsNoTracking().Take(10);
    }
  }
}

您正在显示MVC的路由配置而不是Web Api

public static class WebApiConfig
{
    public static void Register(HttpConfiguration config)
    {
        // Attribute routing.
        config.MapHttpAttributeRoutes();

        // Convention-based routing.

        #region DataAPI

        var ns = new[] { "ERP.Controllers.DataAPI" };
        config.Routes.MapHttpRoute(
            name: "DataAPI",
            routeTemplate: "DataAPI/Community/{ApiKey}",
            defaults: new {controller= "Commmunity", action = "GetCommunities",  ApiKey = Guid.Empty},
            namespaces: ns
        );
        #endregion

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

RouteData必须包含＆＃39; action＆＃39;对于WebAPI路线？

2 个答案: