Update Label Content in background worker

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I have a Process running in background worker .
i need to implement another DownloadProgressChangedEventHandler for Downloading Process of the file and need to show Progress in percentage on UI.Complete Code is in Class file

Code sample

C#

public void _backgroundWorkerDoWork(object sender, DoWorkEventArgs e)
       {

Some Code ......
_backgroundWorker.ReportProgress(1);

Some Code ......
_backgroundWorker.ReportProgress(10);

C#

_wbClient = new WebClient();
             _wbClient.DownloadFile(SeverPath +FileName, DownLoadedFilePath +FileName);

}

Need to show download Progreess of Webclient using

C#

webClient.DownloadFileCompleted += new AsyncCompletedEventHandler(Completed);
              webClient.DownloadProgressChanged += new DownloadProgressChangedEventHandler(ProgressChanged);

on GUI

Please help..
.

Posted 15-Jan-13 0:10am

kedar001

Updated 15-Jan-13 0:27am

v2

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lukeer · Answer 1 · 2013-01-15T00:18:00

The BackgroundWorker class[^] offers a method ReportProgress[^] that causes the ProgressChanged[^] event to be risen not in the working thread but in the thread that created the BackgroundWorker. Usually that is the GUI thread. You can therefore call the method in the worker thread and handle the event in the GUI thread, which can change a label without hassle.

[Edit]
Now you have to rename

C#

new DownloadProgressChangedEventHandler(ProgressChanged)

to

C#

new DownlaodProgressChangedEventHandler(DownloadProgressChanged)

so the method name doesn't interfere with the "other" ProgressChanged method.

Then implement

C#

public void DownloadProgressChanged(object sender, DownloadProgressChangedEventArgs e)
{
    DownloadProgressBar.Value = e.ProgressPercentage;
}

[/Edit]