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ProgressChangedEventHandler Delegate

Definition

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

C#
public delegate void ProgressChangedEventHandler(object sender, ProgressChangedEventArgs e);
C#
public delegate void ProgressChangedEventHandler(object? sender, ProgressChangedEventArgs e);

Parameters

sender
Object

The source of the event.

e
ProgressChangedEventArgs

A ProgressChangedEventArgs that contains the event data.

Examples

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

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

Remarks

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 Handling and Raising Events.

Extension Methods

GetMethodInfo(Delegate)

Gets an object that represents the method represented by the specified delegate.

Applies to

Product Versions
.NET Core 1.0, Core 1.1, Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9
.NET Framework 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1
.NET Standard 2.0, 2.1
UWP 10.0