WebClient.DownloadProgressChanged never gets called

Question

I added an event handler to the WebClient\'s DownloadProgressChanged event, but it never seems to fire. The file successfully downloads, but without having its

Answer 1

client.DownloadFile(url, savepath);

You have to use the async version to download a file, currently you use the blocking, synchronous version.

From the msdn docs for WebClient.DownloadProgressChanged:

Occurs when an asynchronous download operation successfully transfers some or all of the data.

In your case that would be:

client.DownloadProgressChanged += new DownloadProgressChangedEventHandler(client_DownloadProgressChanged);
client.DownloadFileAsync (url, savepath);

Since your method does not directly return any result, this refactoring shouldn't be a problem, note though that the download most likely has not been completed by the time the method returns to the caller.