最終更新:2017-12-07 (木) 16:02:20 (2325d)  

System.ComponentModel.BackgroundWorker
Top / System.ComponentModel.BackgroundWorker

https://msdn.microsoft.com/ja-jp/library/system.componentmodel.backgroundworker(v=vs.110).aspx

  • .NET Framework 2.0から導入
  • デリゲート、Invoke、AddressOf?とかを使わないでマルチスレッドの処理ができる
  • System.ComponentModel.BackgroundWorker 
    Public Class Form1
  //スレッドの処理
  Private Sub BackgroundWorker1_DoWork(ByVal sender As System.Object, ByVal e As System.ComponentModel.DoWorkEventArgs) Handles BackgroundWorker1.DoWork
    System.Threading.Thread.Sleep(New TimeSpan(0, 0, 3))
  End Sub

  //完了時の処理
  Private Sub BackgroundWorker1_RunWorkerCompleted(ByVal sender As Object, ByVal e As System.ComponentModel.RunWorkerCompletedEventArgs) Handles BackgroundWorker1.RunWorkerCompleted
    Me.Label1.Text = "Done!"
  End Sub

  //呼び出し
  Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
    Me.BackgroundWorker1.RunWorkerAsync()
  End Sub
End Class

イベント

  • BackgroundWorker.DoWork?
    BackgroundWorker.ProgressChanged?
    BackgroundWorker.RunWorkerCompleted?
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