找到多个与请求 web api 匹配的操作

Question

当我尝试在api/objects 上发帖时收到此错误Multiple actions were found that match the request（在此处调用我的代码 sn-p 中的最后一个操作） 我正在使用 web api 1。虽然我有更多控制器和更多围绕 web api 的 Post 操作，但它们都有一些简单的输入，如字符串或 int 或简单和复杂数据的组合。这只是一个仅接收一个复杂对象参数的后操作，因此当然是唯一接收ObjectMainData 模型的操作。 这是我的ObjectsController：

   [HttpGet] 
    public List<ObjectMainData> Get()
    {
        CompressResponse();
        return objectRepository.GetObjects(UserPK);
    }
    [HttpGet]


    public List<ObjectMainData> GetObject(string objectId)
    {
        CompressResponse();
        return objectRepository.GetObjects(UserPK, objectId);
    }
    [HttpPost] //Update
    [OnlineAuthorize]
    public ObjectCreatedResponse Post(string objectId,[FromBody]ObjectMainData objekt)
    {
      //  string objectId = objekt.Id;
        ObjectCreatedResponse objectIdAndCode = null;
        objectIdAndCode = objectRepository.Update(objekt);
        return objectIdAndCode;
    }

   //Insert  
    [HttpPost, ActionName("Post")] 
    public ObjectCreatedResponse Spremi(ObjectMainData objekt)
    {
        string objectId = objekt.Id;
        ObjectCreatedResponse objectIdAndCode=null;
        if (objectId == null)
        {
            objectIdAndCode= objectRepository.Insert(objekt,UserPK);
            return objectIdAndCode;

        }
        else
        { 
          objectIdAndCode=objectRepository.Update(objekt);
           return objectIdAndCode;

        }

这是我的 web api 路由配置的相关部分：

        config.Routes.MapHttpRoute(  
             name: "objects/",
             routeTemplate: "api/objects",
             defaults: new { controller = "Objects" }
           );
        config.Routes.MapHttpRoute(
              name: "objects/{objectId}",
              routeTemplate: "api/objects/{objectId}",
              defaults: new { controller = "Objects" },
              constraints: new { objectId = @"\d+-\d+" }
            );

        config.Routes.MapHttpRoute(
           name: "api/objects/{objectId}/Attributes",
           routeTemplate: "api/objects/{objectId}/Attributes",
           defaults: new { controller = "ObjectAttributes" });


        config.Routes.MapHttpRoute(
          name: "api/objects/{objectId}/Images/{imageId}/Description",
          routeTemplate: "api/objects/{objectId}/Images/{imageId}/Description",
          defaults: new { controller = "Images", action = "Description" });


        config.Routes.MapHttpRoute(
         name: "api/objects/{objectId}/images",
         routeTemplate: "api/objects/{objectId}/Images",
         defaults: new { controller = "Images" });

        config.Routes.MapHttpRoute(
          name: "Units types api action selected",
          routeTemplate: "api/units/types/{objectId}",
          defaults: new { controller = "UnitsMisc", action = "Types" });

        config.Routes.MapHttpRoute(
           name: "api/objects/{objectId}/units/{unitId}",
           routeTemplate: "api/objects/{objectId}/units/{unitId}",
           defaults: new { controller = "Units" });


        config.Routes.MapHttpRoute(
        name: "images  api",
        routeTemplate: "api/objects/{objectId}/Units",
        defaults: new { controller = "Units" });


        config.Routes.MapHttpRoute(
         name: "api/objects/{objectId}/Images/sort",
         routeTemplate: "api/objects/{objectId}/Images/sort",
         defaults: new { controller = "Sort", action = "Images" });

      //SLIKA jedna
      config.Routes.MapHttpRoute(
        name: "api/objects/{objectId}/Images/{imageId}",
        routeTemplate: "api/objects/{objectId}/Images/{imageId}",
        defaults: new { controller = "Images" });


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

Answer 1

那是因为你有两个 post action，而路由系统无法选择其中一个

您可以执行以下操作之一来避免该问题：

• 在 Web API 路由和调用中使用操作名称，就像使用 MVC 控制器和路由一样
• 更改更新方法：使用PUT 代替POST。这是 REST 语义：PUT vs POST in REST

进行任何这些更改后，它将开始工作。