如何在Xamarin Android中下载2个文件 [英] How to download 2 files in Xamarin Android

问题描述

我想使用Xamarin andorid在单击按钮时下载.pdf和.mobi文件.我们如何使用webclient触发多个文件下载?

I want to download both .pdf and .mobi file in button click using Xamarin andorid. How can we trigger multiple file download using webclient?

推荐答案

您可以开始使用HttpClient和Task.WhenAll下载两个文件，以便同时下载.

You can start downloading both files using HttpClient and Task.WhenAll in order to download at the same time.

        ...
        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();
        }            
    }

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