Below is the code while explains:
- How to download the file from site Asynchronously and
- Calculate the Total progress while downloading multiple files using WebClient
class Program
{
static Queue<string> downloadUrls
= new Queue<string>();
static long totalFileSize
= 0;
static long bytesRecieved
= 0;
static long totalBytesRecieved
= 0;
#region
main
static void Main(string[] args)
{
DownloadFiles();
}
#endregion
#region
Download file with progress
// First get the total size of all the
files
private static void DownloadFiles()
{
try
{
string file1 = "https://<some site>/file1.jpg";
string file2 = "https://<some
site>/file2.doc";
string file3 = "https://<some site>/file3.ppt";
string[] fileUrls = { file1,
file2, file3 };
foreach (string url in fileUrls)
{
downloadUrls.Enqueue(url);
HttpWebRequest webRequest = (HttpWebRequest)WebRequest.Create(url);
webRequest.Credentials =
CredentialCache.DefaultCredentials;
using (HttpWebResponse webResponse = (HttpWebResponse)webRequest.GetResponse())
{
totalFileSize += webResponse.ContentLength;
Console.WriteLine("File URL = " + url);
Console.WriteLine("File size = " + webResponse.ContentLength);
}
}
Console.WriteLine("Total size = " + totalFileSize.ToString());
Console.WriteLine("Start download the file");
DownloadWithProgress();
Console.ReadLine();
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
}
private static void DownloadWithProgress()
{
string downloadPath = string.Empty;
try
{
if (downloadUrls.Any())
{
WebClient Client = new WebClient();
// Callback method
Client.DownloadProgressChanged +=
DownloadFileProgress;
Client.DownloadFileCompleted +=
DownloadFileCompleted;
var url = downloadUrls.Dequeue();
downloadPath = Environment.GetEnvironmentVariable("TEMP") + "\\" + Path.GetFileName(url);
Client.DownloadFileAsync(new Uri(url),
downloadPath);
}
}
catch (Exception ex)
{
Console.WriteLine("Exception: DownloadWithProgress(): "
+ ex.Message);
}
}
private static void DownloadFileProgress(object sender, DownloadProgressChangedEventArgs
e)
{
try
{
bytesRecieved = totalBytesRecieved
+ e.BytesReceived;
// Calculate the total percentage
double dProgress = (((double)bytesRecieved / totalFileSize)
* 100);
Console.Write('\r' + "Downloading
files: {0}%", Math.Round(dProgress));
}
catch { }
}
private static void DownloadFileCompleted(object sender, AsyncCompletedEventArgs
e)
{
try
{
totalBytesRecieved = bytesRecieved;
DownloadWithProgress();
}
catch { }
}
#endregion
}
