This short article presents the component
HttpFileDownloader for .NET. It was designed a few years ago, that is why it is written for .NET 1.1. However it can be used for newer Frameworks and/or recompiled. It shows the estimated time left and the progress. The component can be used with Windows forms application and with console/service apps.
If used in a windowless environment,
null should be passed to the constructor instead of
this. The code is very simple to use and understand.
Using the Code
Create the instance of the component and the event handler.
_FileDownloader = new DotNetFileDownloader(this);
_FileDownloader.URLDownload = textBox_url.Text; _FileDownloader.LocalFilePath = textBox_local_folder.Text + "\\" + FileName ;
_FileDownloader.UpdateStatusEvent +=new UpdateDelegate(
status event handler is pretty straightforward:
label_status.Text = Message + "\n" + Status.ToString();
if (FullSize != 0 && FullSize != -1)
this.progressBar1.Value = (int)(((double)CurrentBytes / (double)FullSize) * 100);
label_curr_bytes.Text = CurrentBytes.ToString() + " Kb of " +
FullSize.ToString() + " Kb";
if ((Status == DStatus.complete) ||
(Status == DStatus.failed) ||
(Status == DStatus.aborted))
button_start.Enabled = true;
button_stop.Enabled = false;
label_estimated_time.Text = "Estimated time left";
string stmp = EstimatedTimeLeft.ToString();
stmp = stmp.Substring(0, stmp.IndexOf('.'));
label_estimated_time.Text = "Estimated time left : " + stmp;
If required, it can download through the proxy (with user name and password). The downloading can be aborted at any time because it runs in the worker thread.
Points of Interest
If a newer version of this component is released, it can be found here along with other useful classes and components.