private void _BGWorker_ProgressChanged(object sender, ProgressChangedEventArgs e)
{
DownloadInfo info = e.UserState as DownloadInfo;
if (info != null)
{
if (info.Persent == 100)
{
this.Close();
}
this.progressBar1.Value = info.Persent;
_log.Log("Persent is " + info.Persent + "% .");
if (info.Message == "已取消下载")
{
this.Close();
}
if (info.Message == "下载失败")
{
this.label1.Text = "下载失败";
}
this.Text = "载入…（" + info.Persent + "%) " + info.Spead + " " + info.RemainingTime;
}
}
private bool WebClientDownloadInstallerFile(string url, string fileName, double filelength)
{
DateTime startTime = DateTime.Now;
bool resumeDownload = IsResume(url, fileName);
string tempFileName = fileName + ".temp";
bool isDownloadSuccessfully = false;
FileMode fm = FileMode.Create;
Stream stream = null;
FileStream fileStream = null;
long resumDownload = 0;
HttpWebResponse response = null;
this._downloadStopWatch.Start();
try
{
Uri installerUrl = new Uri(url);
HttpWebRequest httpWebRequest = (HttpWebRequest)WebRequest.Create(url);
httpWebRequest.Proxy.Credentials = CredentialCache.DefaultCredentials;
if (resumeDownload)
{
FileInfo fn = new FileInfo(tempFileName);
httpWebRequest.AddRange(fn.Length);
//httpWebRequest.Headers.Add("range",fn.Length.ToString());
resumDownload = fn.Length;
fm = FileMode.Append;
}
response = (HttpWebResponse)httpWebRequest.GetResponse();
stream = response.GetResponseStream();
double contentLength = DownloadManager.GetContentLength(response);
if (contentLength <= 0)
{
contentLength = filelength;
}
byte[] buffer = new byte[BufferSize];
long downloadedLength = 0;
int currentDataLength;
if (resumeDownload)
{
FileInfo fn = new FileInfo(tempFileName);
downloadedLength = fn.Length;
}
fileStream = new FileStream(tempFileName, fm);
while ((currentDataLength = stream.Read(buffer, 0, BufferSize)) > 0 && !this._cancelDownload)
{
fileStream.Write(buffer, 0, currentDataLength);
downloadedLength += (long)currentDataLength;
TimeSpan span = DateTime.Now - startTime;
double second = span.TotalSeconds;
string spead = "";
if (second > 0.001)
{
spead = ((downloadedLength - resumDownload) / 1024 / second).ToString("0.00") + "KB/秒";
}
if (this._downloadStopWatch.ElapsedMilliseconds > 1000)
{
this._downloadStopWatch.Reset();
this._downloadStopWatch.Start();
double doubleDownloadPersent = 0.0;
if (contentLength > 0.0)
{
doubleDownloadPersent = (double)downloadedLength / contentLength;
if (doubleDownloadPersent > 1.0)
{
doubleDownloadPersent = 1.0;
}
}
int intDownloadPersent = (int)(doubleDownloadPersent * 100);
double len = contentLength - downloadedLength;
double seconds = len / (downloadedLength / second);
DownloadInfo info = new DownloadInfo()
{
Message = "xxx", Persent = intDownloadPersent, Spead = spead, RemainingTime = TimeSpan.FromSeconds(seconds).ToString("g").Substring(0, 8)
};
DownloadingStatusChanged(info);
}
}
if (this._cancelDownload)
{
DownloadInfo info = new DownloadInfo()
{
Message = "已取消下载", Persent = 100
};
DownloadingStatusChanged(info);
}
else if (currentDataLength >= 0)
{
// downlown correct
isDownloadSuccessfully = true;
}
}
catch (Exception ex)
{
_bgWorker.ReportProgress(0, new DownloadInfo()
{
Message = "下载失败"
});
isDownloadSuccessfully = false;
//Logger.Trace(ex);
// todo
}
finally
{
this._downloadStopWatch.Stop();
if (fileStream != null)
{
fileStream.Flush();
fileStream.Close();
}
if (stream != null)
{
stream.Close();
}
if (response != null)
{
response.Close();
}
}
if (isDownloadSuccessfully)
{
if (File.Exists(fileName))
{
Util.DeleteFileIfExists(fileName);
}
DownloadInfo info = new DownloadInfo()
{
Message = "xxx", Persent = 100
};
DownloadingStatusChanged(info);
File.Move(tempFileName, fileName);
string tempFileInfoName = fileName + ".temp.info";
if (File.Exists(tempFileInfoName))
{
Util.DeleteFileIfExists(tempFileInfoName);
}
}
return(isDownloadSuccessfully);
}
