使用AngularJS从ASP.NET Web API方法下载文件

Question

在我的Angular JS项目中，我有一个<a>锚标记，当单击它时会GET向返回文件的WebAPI方法发出HTTP 请求。现在，我希望在请求成功后将文件下载到用户。我怎么做？锚标记：<a href="#" ng-click="getthefile()">Download img</a>AngularJS：$scope.getthefile = function () {            $http({        method: 'GET',        cache: false,        url: $scope.appPath + 'CourseRegConfirm/getfile',                    headers: {            'Content-Type': 'application/json; charset=utf-8'        }    }).success(function (data, status) {        console.log(data); // Displays text data if the file is a text file, binary if it's an image                    // What should I write here to download the file I receive from the WebAPI method?    }).error(function (data, status) {        // ...    });}我的WebAPI方法：[Authorize][Route("getfile")]public HttpResponseMessage GetTestFile(){    HttpResponseMessage result = null;    var localFilePath = HttpContext.Current.Server.MapPath("~/timetable.jpg");    if (!File.Exists(localFilePath))    {        result = Request.CreateResponse(HttpStatusCode.Gone);    }    else    {        // Serve the file to the client        result = Request.CreateResponse(HttpStatusCode.OK);        result.Content = new StreamContent(new FileStream(localFilePath, FileMode.Open, FileAccess.Read));        result.Content.Headers.ContentDisposition = new System.Net.Http.Headers.ContentDispositionHeaderValue("attachment");        result.Content.Headers.ContentDisposition.FileName = "SampleImg";                    }    return result;}