private void UpdateProgressBar(ByteArgs e, int step, int totalsteps)
{
if (progressbar.InvokeRequired)
{
UpdateProgressBarCallback d = UpdateProgressBar;
progressbar.Invoke(d, new object[] { e, step, totalsteps });
}
else
{
int stepsize = (int)Math.Round((float)progressbar.Maximum / totalsteps);
float ratio = (float)e.Downloaded / e.Total;
int val = (int)Math.Floor(stepsize * step + stepsize * ratio);
if (val <= progressbar.Maximum)
{
progressbar.Value = val;
TaskbarProgress.SetValue(this.Handle, progressbar.Value, progressbar.Maximum);
}
progressbar.Refresh();
Invalidate();
}
}
public static MemoryStream DownloadWebFile(string url)
{
//open a data stream from the supplied URL
WebRequest webReq = WebRequest.Create(url);
WebResponse webResponse;
try
{
webResponse = webReq.GetResponse();
}
catch (Exception e)
{
MainForm.ErrorDescription = "Failed to retrieve remote revision info...\n" + e.Message;
return(null);
}
Stream dataStream = webResponse.GetResponseStream();
//Download the data in chuncks
byte[] dataBuffer = new byte[1024];
//Get the total size of the download
int dataLength = (int)webResponse.ContentLength;
//lets declare our downloaded bytes event args
ByteArgs byteArgs = new ByteArgs();
byteArgs.Downloaded = 0;
byteArgs.Total = dataLength;
//we need to test for a null as if an event is not consumed we will get an exception
if (BytesDownloaded != null)
{
BytesDownloaded(byteArgs);
}
//Download the data
MemoryStream memoryStream = new MemoryStream();
while (!MainForm.AppClosing)
{
//Let's try and read the data
int bytesFromStream = dataStream.Read(dataBuffer, 0, dataBuffer.Length);
if (bytesFromStream == 0)
{
byteArgs.Downloaded = dataLength;
byteArgs.Total = dataLength;
if (BytesDownloaded != null)
{
BytesDownloaded(byteArgs);
}
//Download complete
break;
}
else
{
//Write the downloaded data
memoryStream.Write(dataBuffer, 0, bytesFromStream);
byteArgs.Downloaded += bytesFromStream;
byteArgs.Total = dataLength;
if (BytesDownloaded != null)
{
BytesDownloaded(byteArgs);
}
}
}
//Release resources
dataStream.Close();
// Rewind and return the stream
memoryStream.Position = 0;
return(MainForm.AppClosing ? null : memoryStream);
}
private void WebdataOnBytesDownloaded(ByteArgs ba)
{
UpdateProgressBar(ba, 0, 2);
}