webclients event "DownloadFileCompleted" isnot firing !

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.NET3.0

C#

using(WebClient webClient = new WebClient())
             {
             MessageBox.Show("inside webclient***");
             webClient.DownloadFile(file, temp_cmp);  // this statement will download the content url/file into the filecreated temp_cmp
             webClient.DownloadFileCompleted += new System.ComponentModel.AsyncCompletedEventHandler(Completed);
             webClient.DownloadDataCompleted +=new DownloadDataCompletedEventHandler(Completed);
             webClient.DownloadFileCompleted += new System.ComponentModel.AsyncCompletedEventHandler(webClient_DownloadFileCompleted);
             MessageBox.Show("after webclient.downloadfile()");
             Thread.Sleep(1000);
             }

and following are my event handlers. i wana try all possibilities, thats why, i wrote many of them

C#

 void webClient_DownloadFileCompleted(object sender, AsyncCompletedEventArgs e)
      {
 MessageBox.Show("Download Completed");
 throw new NotImplementedException();
  }
void Completed(object sender, AsyncCompletedEventArgs e)
  {
 MessageBox.Show("Download Completed");
 MessageBox.Show(e.ToString());
  }

Posted 24-Nov-13 20:57pm

hina_abbas123

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faizulhaque · Answer 1 · 2013-11-24T21:27:00

Events attachment is written after the "DownloadFile".

you may use:

C#

private void btnDownload_Click(object sender, EventArgs e)
{
  WebClient webClient = new WebClient();
  webClient.DownloadFileCompleted += new AsyncCompletedEventHandler(Completed);
  webClient.DownloadFileAsync(new Uri("http://mysite.com/myfile.txt"), @"c:\myfile.txt");
}

private void Completed(object sender, AsyncCompletedEventArgs e)
{
  MessageBox.Show("Download completed!");
}

faizulhaque · Answer 2 · 2013-11-25T01:40:00

Solution 2

check the order of line with method of webclient.

1. you are using "DownloadFile", but in provide code "DownloadFileAsync" for async (usually downloading function are async).
2. you have fire "DownloadFile" this method at start with out attaching the events.

first attach the events than fire it

Posted 25-Nov-13 1:40am

faizulhaque

Updated 25-Nov-13 1:44am

v2