如何在Xamarin Android中下載2個文件

Question

我想使用Xamarin andorid在按鈕單擊下載.pdf和.mobi文件。我們如何使用webclient觸發多個文件下載？

Answer 1

您可以開始使用HttpClient和Task.WhenAll下載這兩個文件，以便同時下載。

 ... 
     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(); 
     }    
    }