Issue with not downloading entire file from web

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VS2012

Hi everyone!

I am running into an issue with using the WebClient.DownloadFile command. It works with small files, but when I try to use it to download ~300MB file, it doesn't download the entire file.

Here is what I have so far:

C#

WebClient webClient = new WebClient();
                webClient.DownloadFileCompleted += new AsyncCompletedEventHandler(Completed);
                webClient.DownloadFileAsync(new Uri(@"https://mysite/waveform_db.sdf"), @"c:\db.sdf");

Is there a way I can make sure it downloads the entire file?

Posted 16-Nov-12 9:31am

joshrduncan2012

Updated 16-Nov-12 10:49am

fjdiewornncalwe

v2

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Sergey Alexandrovich Kryukov · Answer 1 · 2012-11-16T09:52:00

This API is very much simplified. For bigger files, the ability to continue downloading after connection was lost or application terminated and other advanced cases, use System.Net.HttpWebRequest:
http://msdn.microsoft.com/en-us/library/system.net.httpwebrequest.aspx[^].

You can download the source code of my ready-to-use application HTTPDownloader with that implements that "continue downloading" feature and see how it works:
how to download a file from internet[^].

See also my past answers:
FTP: Download Files[^],
how to download a file from the server in Asp.net 2.0[^].

—SA