I have an app that uploads files to server using the webclient. I'd like to display a progressbar while the file upload is in progress. How would I go about achieving this?
Asked
Active
Viewed 2.2k times
2 Answers
26
WebClient.UploadFileAsync will allow you to do this.
WebClient webClient = new WebClient();
webClient.UploadFileAsync(address, fileName);
webClient.UploadProgressChanged += WebClientUploadProgressChanged;
...
void WebClientUploadProgressChanged(object sender, UploadProgressChangedEventArgs e)
{
Console.WriteLine("Upload {0}% complete. ", e.ProgressPercentage);
}
Note that the thread won't block on Upload anymore, so I'd recommend using:
webClient.UploadFileCompleted += WebClientUploadCompleted;
...
void WebClientUploadCompleted(object sender, UploadFileCompletedEventArgs e)
{
// The upload is finished, clean up
}
Glorfindel
- 20,880
- 13
- 75
- 99
Matt Brindley
- 9,581
- 7
- 45
- 49
-
Thanks. I'm working with multithreading, the file upload is already running on a different thread. So should I just use the Uploadfile method or the UploadfileAsync method? – Bruce Adams Jun 11 '09 at 17:12
-
You'll still need to UploadFileAsync I'm afraid, the thread will block on a call to UploadFile so those events will never get called. You can recreate your own blocking by setting a bool flag when you start the upload, reset it in uploadcomplete, then thread.sleep until the flag is cleared. – Matt Brindley Jun 11 '09 at 17:17
-
note: ```UploadProgressChanged``` event does not work well with ```UploadDataAsync``` method – Chauskin Rodion Jul 03 '17 at 16:18
-
How to pass parameters like FileName in WebClient? – Nirav Parsana Jul 11 '19 at 05:29
-
Did you use any cancelAsyc in your method. if yes how did you use it in a way the cancel upload stop on the spot and not wait to end the upload process to cancel? – H_H Dec 03 '19 at 09:58
2
Add your event handler to WebClient.UploadProgressChanged and call WebClient.UploadFileAsync.
See the WebClient.UploadProgressChanged documentation for an example.
