How To View The Downloaded File When Another Download Is In Progress Using Xamarin Android

I am implementing a mobile app using Xamarin android. I have implemented a code to download both.PDF and .Mobi file in a button click. I have used the below code. ... awa

Solution 1:

Since you're not showing any UI stuff i guess you have that covered to i will omit that.

Instead of writing: await Task.WhenAll(DownloadPDF(), DownloadMobi());

do the following

await DownloadPDF();
// update button to display "View PDF"// add button click listener (optional if it's already registered)// open file in PDF reader
await DownloadMobi();

Solution 2:

Use ContinueWith Method of Task

var task = DownloadPDF();
task.ContinueWith((pdfDownloadTask)=>DownloadMobi());

This will continue execution of next task after pdf download task is complete

Solution 3:

private stringBuilder urlStr = null;
 publicvoidDownloadFiles()
 {
   List<string> url = new List<string>();
   urlStr = new StringBuilder();
   url.add("http://files/file.pdf");
   url.add("http://files/file.mobi");
   var tasks = new List<Task>();
   foreach(var tempUrl in url)
   {
     tasks.add(DownloadMobiAndPdf(tempUrl);
   }
   Task.WhenAll(tasks));
 }

 privateasync Task DownloadMobiAndPdf(string url)
  {
    using(var client = new WebClient())
    {
       urlStr.Append(url);
       await client.DonwloadFileTaskAsync(url);
      client.DownloadFileCompleted+=Client_DownloadFileCompleted;
    }
  }




privatestaticvoidClient_DownloadFileCompleted(object 
sender,System.ComponentModel.AsyncCompletedEventArgs e)
{

if(e.Error == null)
{
 //No errorif(urlStr.Contains("pdf") 
 {
   //Enable button
 }

 }

 }