ReportProgress Method (Int32)
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BackgroundWorker.ReportProgress Method (Int32)

Raises the ProgressChanged event.

Namespace:  System.ComponentModel
Assembly:  System (in System.dll)

public void ReportProgress(
	int percentProgress


Type: System.Int32
The percentage, from 0 to 100, of the background operation that is completed.


The WorkerReportsProgress property is set to false.

If you need the background operation to report on its progress, you can call the ReportProgress method to raise the ProgressChanged event. The WorkerReportsProgress property value must be true, or ReportProgress will throw an InvalidOperationException.

It is up to you to implement a meaningful way of measuring your background operation's progress as a percentage of the total task completed.

The following code example demonstrates the use of the ReportProgress method to report the progress of a background operation to the user. To view the complete code for this sample, see How to: Use a Background Worker.

private void bw_DoWork(object sender, DoWorkEventArgs e)
    BackgroundWorker worker = sender as BackgroundWorker;

    for (int i = 1; (i <= 10); i++)
        if ((worker.CancellationPending == true))
            e.Cancel = true;
            // Perform a time consuming operation and report progress.
            worker.ReportProgress((i * 10));


Supported in: 5, 4, 3

Silverlight for Windows Phone

Supported in: Windows Phone OS 7.1, Windows Phone OS 7.0

XNA Framework

Supported in: Xbox 360, Windows Phone OS 7.0

For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.

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