angularjs：FileUpload方法，单个参数获取错误

Question

我正在尝试创建一个角度函数来调用web api来上传文件。我执行它时遇到错误。以下是功能和错误消息。

$scope.UploadFiles = function (id) {
    debugger;
    var fd = new FormData($('form')[1]);
    var config = {
        headers: {
            'Content-Type': undefined,
            'cache': false,
            'processData': false,
        },
        transformRequest: angular.identity,
        data:fd
    };
    $http.post('/api/Project/PostProjectFiles', id, config)
        .then(function (response) {
            alert('File Upload SUCCESS'+response.data);
        })
      .catch(function (response) {
          alert('File Upload FAILED: ' + JSON.stringify(response));
          console.log(response.data);
      })

错误讯息：

"Message":"No HTTP resource was found that matches the request URI 'http://localhost:63104/api/Project/PostProjectFiles'.","MessageDetail":"No action was found on the controller 'Project' that matches the request."

我的API只接受一个参数

public HttpResponseMessage PostProjectFiles(int id)
    {
        HttpResponseMessage result = null;
        var httpRequest = HttpContext.Current.Request;
        if (httpRequest.Files.Count > 0 && id>0)
        {
            Project objProject = dbContext.Projects.Find(id);

            int i = 0;
            foreach (string file in httpRequest.Files)
            {
                if (i == 0)
                {
                    var postedFile = httpRequest.Files[file];

                    var fileName = postedFile.FileName.ToString();
                    if(!String.IsNullOrEmpty(fileName))
                    { 
                    var fileNameWithID = id.ToString() + "_A_" + fileName;
                    var filePath = HttpContext.Current.Server.MapPath("~/UploadedFiles/" + fileNameWithID);
                    postedFile.SaveAs(filePath);
                    objProject.AFileID = fileNameWithID;
                    objProject.AFile = fileName;
                    }

                }
                else if (i == 1)
                {
                    var postedFile = httpRequest.Files[file];
                    var fileName = postedFile.FileName.ToString();
                    if (!String.IsNullOrEmpty(fileName))
                    {
                        var fileNameWithID = id.ToString() + "_N_" + fileName;
                        var filePath = HttpContext.Current.Server.MapPath("~/UploadedFiles/" + fileNameWithID);
                        postedFile.SaveAs(filePath);
                        objProject.NFileID = fileNameWithID;
                        objProject.NFile = fileName;
                    }
                }
                else if (i == 2)
                {

                    var postedFile = httpRequest.Files[file];
                    var fileName = postedFile.FileName.ToString();
                    if (!String.IsNullOrEmpty(fileName))
                    {
                        var fileNameWithID = id.ToString() + "_Other_" + fileName;
                        var filePath = HttpContext.Current.Server.MapPath("~/UploadedFiles/" + fileNameWithID);
                        postedFile.SaveAs(filePath);
                        objProject.OtherFileID = fileNameWithID;
                        objProject.OtherFile = fileName;
                    }
                }
                i++;

            }
            dbContext.SaveChanges();
            result = Request.CreateResponse(HttpStatusCode.Created);
        }
        else
        {
            result = Request.CreateResponse(HttpStatusCode.BadRequest);
        }
        return result;
    }

另请注意，操作方法存在于控制器中，我不知道为什么会出现错误。

配置，

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