public void Download(string fileName, string fileUrl)
{
Taskes.Add(new DownloadTask()
{
FileName = fileName,
Url = fileUrl
});
}
public void Download(DownloadTask downloadTask)
{
Taskes.Add(downloadTask);
}
public void Cancel(DownloadTask downloadTask)
{
Taskes.Remove(downloadTask);
}
private bool StartDownload()
{
if (currentDownloadTask.Url == null)
{
throw new ArgumentNullException("url");
}
currentDownloadTask.State = DownloadState.Downloading;
bool isDownloadSuccessfully = false;
Stream stream = null;
FileStream fileStream = null;
string tempFileName = Path.GetTempFileName();
downloadStopWatch.Start();
try
{
Uri installerUrl = new Uri(currentDownloadTask.Url);
currentDownloadTask.CurrentDownloadTotalBytes = 0;
currentDownloadTask.CurrentDownloadBytesSinceStopWatch = 0;
using (WebClient myHttpWebClient = new WebClient())
{
System.Net.ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls12;
fileStream = new FileStream(tempFileName, FileMode.Create);
stream = myHttpWebClient.OpenRead(installerUrl);
double contentLength = GetContentLength(myHttpWebClient);
byte[] buffer = new byte[(int)contentLength];
long downloadedLength = 0;
long currentTimeSpanDataLength = 0;
int currentDataLength;
while ((currentDataLength = stream.Read(buffer, 0, (int)contentLength)) > 0 /* && !this._cancelDownload*/)
{
fileStream.Write(buffer, 0, currentDataLength);
downloadedLength += (long)currentDataLength;
currentTimeSpanDataLength += (long)currentDataLength;
if (downloadStopWatch.ElapsedMilliseconds > 800)
{
double num5 = (double)currentTimeSpanDataLength / 1024.0;
double num6 = (double)downloadStopWatch.ElapsedMilliseconds / 1000.0;
double doubleDownloadSpeed = num5 / num6;
currentDownloadTask.Speed = (int)Math.Round(doubleDownloadSpeed, 0);
downloadStopWatch.Reset();
downloadStopWatch.Start();
currentTimeSpanDataLength = 0;
}
double doubleDownloadPersent = 0.0;
if (contentLength > 0.0)
{
doubleDownloadPersent = (double)downloadedLength / contentLength;
if (doubleDownloadPersent > 1.0)
{
doubleDownloadPersent = 1.0;
}
}
int intDownloadPersent = (int)(doubleDownloadPersent * 100);
if (currentDownloadTask.Speed != 0)
{
currentDownloadTask.Percent = intDownloadPersent;
//DownloadingStatusChanged(info);
}
}
if (currentDataLength >= 0)
{
// download correct
isDownloadSuccessfully = true;
}
}
}
catch (Exception ex2)
{
currentDownloadTask.DownloadFailed(ex2.Message);
Taskes.Remove(currentDownloadTask);
currentDownloadTask.State = DownloadState.Stop;
}
finally
{
downloadStopWatch.Stop();
if (fileStream != null)
{
fileStream.Close();
}
if (stream != null)
{
stream.Close();
}
}
if (isDownloadSuccessfully)
{
if (File.Exists(currentDownloadTask.FileSavePath))
{
File.Delete(currentDownloadTask.FileSavePath);
}
currentDownloadTask.Percent = 100;
currentDownloadTask.Speed = 0;
Taskes.Remove(currentDownloadTask);
File.Move(tempFileName, currentDownloadTask.FileSavePath);
currentDownloadTask.State = DownloadState.DownloadFinished;
currentDownloadTask.DownloadFinish();
}
return(isDownloadSuccessfully);
}
