BackgroundWorker.ProgressChanged 事件

定義

命名空間:

System.ComponentModel

組件:

System.ComponentModel.EventBasedAsync.dll

來源:

BackgroundWorker.cs

當呼叫 ReportProgress(Int32) 時發生。

public:
 event System::ComponentModel::ProgressChangedEventHandler ^ ProgressChanged;

public event System.ComponentModel.ProgressChangedEventHandler? ProgressChanged;

member this.ProgressChanged : System.ComponentModel.ProgressChangedEventHandler 

Public Custom Event ProgressChanged As ProgressChangedEventHandler 

事件類型

ProgressChangedEventHandler

範例

下列程式代碼範例示範如何使用 ProgressChanged 事件向用戶報告異步操作的進度。 此程式代碼範例是提供給 類別之較大範例的 BackgroundWorker 一部分。

// 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

備註

當您呼叫 ReportProgress 方法時，就會引發此事件。

如需如何處理事件的詳細資訊，請參閱 處理和引發事件。

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