如何将 HttpStreamContent 写入文件？答案

【问题标题】：How can i write HttpStreamContent to file?如何将 HttpStreamContent 写入文件？
【发布时间】：2016-03-25 10:56:44
【问题描述】：

这是我下载文件的代码。但我不确定如何将文件写入磁盘。

private async Task DownloadFile()
    {
        HttpStreamContent streamContent = new HttpStreamContent(new SlowInputStream(streamLength));
        IProgress<HttpProgress> progress = new Progress<HttpProgress>(ShowProgress);
        response = await httpClient.PostAsync(new Uri(downloadUrl), streamContent).AsTask(cts.Token, progress);
    }

我不知道在这里写什么以及在哪里调用 WriteToFile()：

  private async Task WriteToFile()
    {
        var myFile = await KnownFolders.MusicLibrary.CreateFileAsync(filename.Replace("---", " - ")+".mp3", CreationCollisionOption.GenerateUniqueName);
///stuck here
    }

【问题讨论】：

您需要将响应写入文件吗？请澄清
响应包含什么？文件内容？

标签： c# file windows-runtime windows-phone-8.1 http-streaming

【解决方案1】：

我是这样工作的：

private async Task DownloadFile()
    {

        IProgress<HttpProgress> progress = new Progress<HttpProgress>(ShowProgress);
        try
        {

            response = await httpClient.GetAsync(new Uri(downloadUrl), HttpCompletionOption.ResponseContentRead).AsTask(cts.Token, progress);
            DownloadMessageText.Text = "Download complete. Writing to disk...";
            await WriteToFile();
            DownloadMessageText.Text = "File saved in music library.";
        }
        catch { }


    }

并写入磁盘：

private async Task WriteToFile()
    {
        var myFile = await KnownFolders.MusicLibrary.CreateFileAsync(filename.Replace("---", " - ") + ".mp3", CreationCollisionOption.GenerateUniqueName);
        var fs = await myFile.OpenAsync(FileAccessMode.ReadWrite);
        IBuffer buffer = await response.Content.ReadAsBufferAsync();
        await fs.WriteAsync(buffer);
    }

【讨论】：