WinRT StorageFile写下载文件

问题描述

我正在努力解决一个容易的问题。我想使用以下代码从网站下载图片：

  WebRequest requestPic = WebRequest.Create（@http：// something .com /+ id +.jpg）; 
 WebResponse responsePic = await requestPic.GetResponseAsync（）; 
  

现在我想将WebResponse的流写入一个StorageFile（例如，创建一个文件id.jpg应用程序的存储），但是我没有找到任何方法来实现。我搜索了网页，但没有成功 - 所有方式都不兼容流类型等。

请问你可以帮忙吗？

解决方案

我已经找到了以下解决方案，它的工作并不复杂。

  public async static任务< StorageFile> SaveAsync（
 Uri fileUri，
 StorageFolder文件夹，
 string fileName）
 {
 var file = await folder.CreateFileAsync（fileName，CreationCollisionOption.ReplaceExisting）; 
 var downloader = new BackgroundDownloader（）; 
 var download = downloader.CreateDownload（
 fileUri，
 file）; 
 
 var res = await download.StartAsync（）; 
 
返回文件; 
} 
  

I'm struggling with a easy problem. I want to download an image from web using this code:

WebRequest requestPic = WebRequest.Create(@"http://something.com/" + id + ".jpg");
WebResponse responsePic = await requestPic.GetResponseAsync();

Now I wanted to write the WebResponse's stream in a StorageFile (eg. create a file id.jpg in the app's storage), but I haven't found any way to achieve that. I searched the web for it, but no success - all ways incompatible Stream types and so on.

Could you please help?

解决方案

I have found the following solution, which works and is not too complicated.

    public async static Task<StorageFile> SaveAsync(
        Uri fileUri,
        StorageFolder folder,
        string fileName)
    {
        var file = await folder.CreateFileAsync(fileName, CreationCollisionOption.ReplaceExisting);
        var downloader = new BackgroundDownloader();
        var download = downloader.CreateDownload(
            fileUri,
            file);

        var res = await download.StartAsync();

        return file;
    }

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