如何在Xamarin Android下载2个文件

Question

我想使用Xamarin andorid按钮单击下载.pdf和.mobi文件。我们如何使用webclient触发多个文件下载？

Answer 1

您可以使用HttpClient和Task.WhenAll开始下载这两个文件，以便同时下载。

        ...
        await Task.WhenAll(DownloadPDF(), DownloadMobi());
    }

    private async Task DownloadPDF()
    {
        var httpclient = new HttpClient(new AndroidClientHandler());
        using (var stream = await httpclient.GetStreamAsync("http://files/file.pdf"))
        using (var file = System.IO.File.Create("path/to/file.pdf"))
        {
            await stream.CopyToAsync(file);
            await file.FlushAsync();
        }
    }

    private async Task DownloadMobi()
    {
        var httpclient = new HttpClient(new AndroidClientHandler());

        using (var stream = await httpclient.GetStreamAsync("http://files/file.mobi"))
        using (var file = System.IO.File.Create("path/to/file.mobi"))
        {
            await stream.CopyToAsync(file);
            await file.FlushAsync();
        }            
    }