如何在parallel.foreach中使用进度条？

Question

I have number of files to be downloaded and I have used Parallel.foreach in C#. It is working fine. Now I want to check the progress of download using progressbar. How is this possible?

I have used this code:

Parallel.For(0, numofitems, options, j =>
{
   using (WebClient client = new WebClient())
   {
       client.DownloadProgressChanged += new DownloadProgressChangedEventHandler(client_DownloadProgressChanged);

       client.DownloadFile(list[j], @"F:\Test\Test2\a" + j + ".png"); 
   }
}

Answer 1

Try this one.

1.Drop a progressbar into your form. In my example I leave the name it as is "progressBar1"

2.Add this change your DownloadProgressChanged event into the following

 client.DownloadProgressChanged += (s, e) =>
       {
        progressBar1.Value = e.ProgressPercentage;
       };