ProgressChangedEventHandler Delegate

Reference

Definition

Namespace:: System.ComponentModel

Assembly:: System.ComponentModel.EventBasedAsync.dll

Assembly:: System.dll

Assembly:: netstandard.dll

Important

Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.

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

public delegate void ProgressChangedEventHandler(System::Object ^ sender, ProgressChangedEventArgs ^ e);

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

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

type ProgressChangedEventHandler = delegate of obj * ProgressChangedEventArgs -> unit

Public Delegate Sub ProgressChangedEventHandler(sender As Object, e As ProgressChangedEventArgs)

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.

// This event handler updates the progress bar.
void backgroundWorker1_ProgressChanged( Object^ /*sender*/, ProgressChangedEventArgs^ e )
{
   this->progressBar1->Value = e->ProgressPercentage;
}

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

' This event handler updates the progress bar.
Private Sub backgroundWorker1_ProgressChanged( _
ByVal sender As Object, ByVal e As ProgressChangedEventArgs) _
Handles backgroundWorker1.ProgressChanged

    Me.progressBar1.Value = e.ProgressPercentage

End Sub

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

Partajați prin