相关疑难解决方法(0)

我想知道是否可以检测浏览器是否在iOS上运行,类似于使用Modernizr进行特征检测的方式(尽管这显然是设备检测而不是功能检测).

通常我更喜欢功能检测,但我需要找出一个设备是否是iOS,因为他们根据这个问题处理视频的方式YouTube API无法使用iPad/iPhone /非Flash设备

我的API控制器正在返回一个csv文件,如下所示:

    [HttpPost]
    public HttpResponseMessage GenerateCSV(FieldParameters fieldParams)
    {
        var output = new byte[] { };
        if (fieldParams!= null)
        {
            using (var stream = new MemoryStream())
            {
                this.SerializeSetting(fieldParams, stream);
                stream.Flush();
                output = stream.ToArray();
            }
        }
        var result = new HttpResponseMessage(HttpStatusCode.OK) { Content = new ByteArrayContent(output) };
        result.Content.Headers.ContentType = new MediaTypeHeaderValue("application/octet-stream");
        result.Content.Headers.ContentDisposition = new ContentDispositionHeaderValue("attachment")
        {
            FileName = "File.csv"
        };
        return result;
    }

我发送和接收csv文件的angularjs如下所示:

$scope.save = function () {
            var csvInput= extractDetails();

            // File is an angular resource. We call its save method …

我想在浏览器窗口中打开Blob对象.

这个代码可以在任何地方工作,但iOS Chrome(和IE当然,但我可以解决IE).窗口未重定向到URL(这是正确的或至少与其他浏览器相同).Chrome iOS有任何已知的解决方法吗？

var blob = new window.Blob(['Hello, world!'], {type: 'text/plain;charset=utf-8'});
window.URL = window.URL || window.webkitURL;
var url = window.URL.createObjectURL(blob);
window.location.href = url;

我试过<a href="{blobUrl}>而不是window.location.href但它也不起作用.

public class DefaultController : Controller
{
    // GET: Default
    public ActionResult Index()
    {
        return Download();
    }

    public FileResult Download()
    {
        string xmlString = "my test xml data";
        string fileName = "test" + ".xml";
        return File(Encoding.UTF8.GetBytes(xmlString), "application/xml", fileName);
    }
}

我在asp.net mvc应用程序中有上面的代码来下载文件.它工作正常,因为我的控制器继承到Controller.但是,当我将此代码移动到Webapi控制器时,它会在返回File时抛出错误.经过分析,我发现webapi中的控制器继承到ApiController(system.web.http.api控制器).我发现ApiController中没有File类.有没有选项在webapi控制器中实现下载文件功能？

我在webapi控制器中尝试了下面的替代代码,但是一旦我调用它就看不到下载文件.

public HttpResponseMessage DownloadConstructedXmlFile()
        {
            var result = new HttpResponseMessage(HttpStatusCode.OK);
            string xmlContent = "My test xml data";
            //var serializer = new XmlSerializer(typeof(xmlContent));

            var builder = new StringBuilder();
            using (var writer = new StringWriter(builder))
            {
                // serializer.Serialize(writer, xmlContent); …

将文件上传到服务器时,它很棒; 没有损坏的文件.然而,当我下载文件时(除了纯粹的txt:s,它们是woork),它们的大小会变大并变得腐败.经过大量的调查后,我不知道会出现什么问题.我只是将文件作为流写入响应并下载blob.
欢迎任何想法!

严重依赖此Thread解决方案; 使用AngularJS从ASP.NET Web API方法下载文件

现行守则如下;

的WebAPI:

    [Route("GetFile")]
public HttpResponseMessage GetFile()
{
    HttpResponseMessage result = null;
    //Get file object here
    try 
    {
        IEnumerable<string> headerValues = Request.Headers.GetValues("fileID");
        int key = Int32.Parse(headerValues.FirstOrDefault());
        var fetchFile = db.FileRecords.Single(a => a.id == key);

        var localFilePath = fetchFile.path + fetchFile.name;

        if (!System.IO.File.Exists(localFilePath))
        {
            result = Request.CreateResponse(HttpStatusCode.Gone);
        }
        else
        {// serve the file to the client
            //I have used the x-filename header to send the filename. This is a custom header for convenience.
            //You should …

我想使用从Web服务器下载pdf文件$http.我使用这个效果很好的代码,我的文件只保存为html文件,但是当我打开它时,它会以pdf格式打开但在浏览器中.我在Chrome 36,Firefox 31和Opera 23上进行了测试.

这是我的angularjs代码(基于此代码):

UserService.downloadInvoice(hash).success(function (data, status, headers) {
                    var filename,
                        octetStreamMime = "application/octet-stream",
                        contentType;

                    // Get the headers
                    headers = headers();

                    if (!filename) {
                        filename = headers["x-filename"] || 'invoice.pdf';
                    }

                    // Determine the content type from the header or default to "application/octet-stream"
                    contentType = headers["content-type"] || octetStreamMime;

                    if (navigator.msSaveBlob) {
                        var blob = new Blob([data], { type: contentType });
                        navigator.msSaveBlob(blob, filename);
                    } else {
                        var urlCreator = window.URL || window.webkitURL || window.mozURL || window.msURL; …

我根据斯科特的答案撰写了一份指令.你会这样使用它:

<button class="btn btn-success"
        download-response="getData()"
        download-success="getDataSuccess()"
        download-error="getDataError()"
        download-name="{{name}}.pdf"
        download-backup-url="/Backup/File.pdf">
    Save
</button>

问题:下面的代码引发错误TypeError: Invalid calling object在IE11第一方法(行:saveBlob(blob, filename);).即使它回归到其他下载方法,我的理解是saveMethod1应该工作IE11.

这是代码:

'use strict';

// directive allows to provide a function to be executed to get data to be downloaded
// attributes:
// download-response - Required. Function to get data. It must return a promise. It must be declared on the $scope.
// download-success - Optional. Function to be executed if download-response function was …

我试图从Web API获取PDF文档,并希望在Angular App中显示.获取"无法加载PDF文档错误".我在" 角度应用程序 "帖子中跟随了" AngularJS:显示blob(.pdf) ".然而,我可以通过以下" 使用AngularJS从ASP.NET Web API方法下载文件 "文章成功下载相同的文件.

看起来我得到的文件是"Chunked Transfer Encoded".不知何故,当试图在角度应用程序中显示时,这不会被解码.请指教.

Web API代码:

HttpResponseMessage result = null;
        var localFilePath = @"C:\Test.pdf";

        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.ContentType = new MediaTypeHeaderValue("application/pdf");
            result.Content.Headers.ContentDisposition.FileName = "Test.pdf";
            result.Content.Headers.Add("x-filename", "Test.pdf");
        }

        return result;

角度控制器:

   myModule.controller("pdfviewerController", function ($scope, $http, $log, $sce) {
$http.post('/api/Sample/GetTestFile', {responseType:'arraybuffer'})
 .success(function (response) {      
  var file …