DoWorkEventArgs Sınıf

Tanım

public ref class DoWorkEventArgs : EventArgs

public ref class DoWorkEventArgs : System::ComponentModel::CancelEventArgs

public class DoWorkEventArgs : EventArgs

public class DoWorkEventArgs : System.ComponentModel.CancelEventArgs

type DoWorkEventArgs = class
    inherit EventArgs

type DoWorkEventArgs = class
    inherit CancelEventArgs

Public Class DoWorkEventArgs
Inherits EventArgs

Public Class DoWorkEventArgs
Inherits CancelEventArgs

Devralma

Object

EventArgs

DoWorkEventArgs

Devralma

Object

EventArgs

CancelEventArgs

DoWorkEventArgs

Örnekler

Aşağıdaki kod örneği, olayı işlemek DoWork için sınıfının nasıl kullanılacağını DoWorkEventArgs gösterir. Tam kod listesi için bkz . Nasıl yapılır: Arka Planda İşlem Çalıştırma.

private void backgroundWorker1_DoWork(object sender, DoWorkEventArgs e)
{
    // Do not access the form's BackgroundWorker reference directly.
    // Instead, use the reference provided by the sender parameter.
    BackgroundWorker bw = sender as BackgroundWorker;

    // Extract the argument.
    int arg = (int)e.Argument;

    // Start the time-consuming operation.
    e.Result = TimeConsumingOperation(bw, arg);

    // If the operation was canceled by the user, 
    // set the DoWorkEventArgs.Cancel property to true.
    if (bw.CancellationPending)
    {
        e.Cancel = true;
    }
}

Private Sub backgroundWorker1_DoWork( _
sender As Object, e As DoWorkEventArgs) _
Handles backgroundWorker1.DoWork

   ' Do not access the form's BackgroundWorker reference directly.
   ' Instead, use the reference provided by the sender parameter.
   Dim bw As BackgroundWorker = CType( sender, BackgroundWorker )
   
   ' Extract the argument.
   Dim arg As Integer = Fix(e.Argument)
   
   ' Start the time-consuming operation.
   e.Result = TimeConsumingOperation(bw, arg)
   
   ' If the operation was canceled by the user, 
   ' set the DoWorkEventArgs.Cancel property to true.
   If bw.CancellationPending Then
      e.Cancel = True
   End If

End Sub

Oluşturucular

Özellikler

Yöntemler

Şunlara uygulanır

Ayrıca bkz.

• BackgroundWorker
• Nasıl yapılır: Arka Planda İşlem Çalıştırma