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ProgressChangedEventHandler Delegate
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ProgressChangedEventHandler Delegate

Represents the method that will handle the ProgressChanged event of the BackgroundWorker class. This class cannot be inherited.

Namespace:  System.ComponentModel
Assemblies:   System.ComponentModel.EventBasedAsync (in System.ComponentModel.EventBasedAsync.dll)
  System (in System.dll)

public delegate void ProgressChangedEventHandler(
	Object sender,
	ProgressChangedEventArgs e
)

Parameters

sender
Type: System.Object

The source of the event.

e
Type: System.ComponentModel.ProgressChangedEventArgs

A ProgressChangedEventArgs that contains the event data.

When you create a ProgressChangedEventHandler delegate, you identify a method to handle the event. To associate the event with your event handler, add an instance of the delegate to the event. The event handler is called whenever the event occurs, unless you remove the delegate. For more information about event handler delegates, see Events and Delegates.

The following code example shows how to use the ProgressChangedEventHandler class. This example is part of a larger example for the BackgroundWorker class.

// This event handler updates the progress bar. 
private void backgroundWorker1_ProgressChanged(object sender,
    ProgressChangedEventArgs e)
{
    this.progressBar1.Value = e.ProgressPercentage;
}

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5, 3.0, 2.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

.NET for Windows Phone apps

Supported in: Windows Phone 8.1, Windows Phone Silverlight 8.1, Windows Phone Silverlight 8

Portable Class Library

Supported in: Portable Class Library
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