Question

我已经安装了Web-Api路由调试器，试图弄清楚这里发生了什么，它报告了以下异常： -

System.InvalidOperationException was unhandled by user code
  HResult=-2146233079
  Message=Multiple actions were found that match the request: 
System.Net.Http.HttpResponseMessage GetTasksByParentAndList(Int32, Int32, Int32, Int32) on type AcademicStudio.WebHost.Controllers.TasksController
System.Net.Http.HttpResponseMessage GetTasksByListTreeAndDepartmentAndTerms(Int32, Int32, Int32, Int32, Int32[], Int32[]) on type AcademicStudio.WebHost.Controllers.TasksController
  Source=System.Web.Http
  StackTrace:
       at System.Web.Http.Controllers.ApiControllerActionSelector.ActionSelectorCacheItem.SelectAction(HttpControllerContext controllerContext)
       at System.Web.Http.Controllers.ApiControllerActionSelector.SelectAction(HttpControllerContext controllerContext)
       at AcademicServer.WebHost.Areas.RouteDebugger.InspectActionSelector.SelectAction(HttpControllerContext controllerContext) in d:\AcademicServer\AcademicServer.WebHost\Areas\RouteDebugger\InspectActionSelector.cs:line 42
       at System.Web.Http.Tracing.Tracers.HttpActionSelectorTracer.<>c__DisplayClass2.<System.Web.Http.Controllers.IHttpActionSelector.SelectAction>b__0()
       at System.Web.Http.Tracing.ITraceWriterExtensions.TraceBeginEnd(ITraceWriter traceWriter, HttpRequestMessage request, String category, TraceLevel level, String operatorName, String operationName, Action`1 beginTrace, Action execute, Action`1 endTrace, Action`1 errorTrace)
  InnerException:

这两个动作都在控制器中使用ActionName属性声明，如下所示:(并且具有不同的参数）。

[ActionName("ParentAndList")]
public HttpResponseMessage GetTasksByParentAndList(Int32 parentId, Int32 listId, Int32 fromId, Int32 toId)
{
    var service = new TaskService();
    var data = service.SelectTasksByParentAndList(parentId, listId, fromId, toId);
    return Request.CreateResponse(HttpStatusCode.OK, data);
}

[ActionName("ListTreeAndDepartmentAndTerms")]
public HttpResponseMessage GetTasksByListTreeAndDepartmentAndTerms(Int32 parentId, Int32 listId, Int32 fromId, Int32 toId, [FromUri]Int32[] defs, [FromUri]Int32[] depts)
{
    var service = new TaskService();
    var data = service.SelectTasksByListTreeAndDepartmentAndTerms(parentId, listId, fromId, toId, defs, depts);
    return Request.CreateResponse(HttpStatusCode.OK, data);
}

有谁可以解释发生了什么？控制器包含许多使用ActionName声明的其他操作，它们工作正常。

更新

发布问题十分钟后我发现了：在WebApiConfig.cs中没有正确配置MapHttpRoutes

为什么你可以在放弃后十分钟盯着某些东西，然后放弃一分钱，最后放下一个问题呢？

SelectAction失败：找到多个操作。为什么？

0 个答案: