BackgroundWorker.IsBusy 속성

정의

네임스페이스:

System.ComponentModel

어셈블리:

System.ComponentModel.EventBasedAsync.dll

Source:

BackgroundWorker.cs

BackgroundWorker가 비동기 작업을 실행하고 있는지 여부를 나타내는 값을 가져옵니다.

public:
 property bool IsBusy { bool get(); };

public bool IsBusy { get; }

member this.IsBusy : bool

Public ReadOnly Property IsBusy As Boolean

속성 값

Boolean

BackgroundWorker가 비동기 작업을 실행하고 있으면 true이고, 그렇지 않으면 false입니다.

예제

다음 코드 예제를 사용 IsBusy 하는 방법에 설명 합니다 작업이 완료 BackgroundWorker 될 때까지 대기 하는 속성입니다. 이 코드 예제는 방법: 백그라운드에서 파일 다운로드에 설명된 더 큰 예제의 일부입니다.

private void downloadButton_Click(object sender, EventArgs e)
{
    // Start the download operation in the background.
    this.backgroundWorker1.RunWorkerAsync();

    // Disable the button for the duration of the download.
    this.downloadButton.Enabled = false;

    // Once you have started the background thread you 
    // can exit the handler and the application will 
    // wait until the RunWorkerCompleted event is raised.

    // Or if you want to do something else in the main thread,
    // such as update a progress bar, you can do so in a loop 
    // while checking IsBusy to see if the background task is
    // still running.

    while (this.backgroundWorker1.IsBusy)
    {
        progressBar1.Increment(1);
        // Keep UI messages moving, so the form remains 
        // responsive during the asynchronous operation.
        Application.DoEvents();
    }
}

Private Sub downloadButton_Click( _
    ByVal sender As Object, _
    ByVal e As EventArgs) _
    Handles downloadButton.Click

    ' Start the download operation in the background.
    Me.backgroundWorker1.RunWorkerAsync()

    ' Disable the button for the duration of the download.
    Me.downloadButton.Enabled = False

    ' Once you have started the background thread you 
    ' can exit the handler and the application will 
    ' wait until the RunWorkerCompleted event is raised.

    ' If you want to do something else in the main thread,
    ' such as update a progress bar, you can do so in a loop 
    ' while checking IsBusy to see if the background task is
    ' still running.
    While Me.backgroundWorker1.IsBusy
        progressBar1.Increment(1)
        ' Keep UI messages moving, so the form remains 
        ' responsive during the asynchronous operation.
        Application.DoEvents()
    End While
End Sub

설명

는 BackgroundWorker 를 호출 RunWorkerAsync할 때 비동기 작업을 시작합니다.

추가 정보

• RunWorkerCompleted
• EventArgs
• RunWorkerAsync
• 방법: 백그라운드에서 작업 실행
• 방법: 백그라운드에서 파일 다운로드