VBNet 如何知道后台工作程序是否已被取消

发布于 2024-12-23 13:28:57 字数 578 浏览 2 评论 0原文

目前，我有以下代码： My_BgWorkerB 是我的 BackGround Worker 的名称

    If My_BgWorkerB.IsBusy Then
        If My_BgWorkerB.WorkerSupportsCancellation Then
            My_BgWorkerB.CancelAsync()
        End If

        ' in this part i want to know if the background worker is already stopped
        ' so that i can start it again

        ' My_BgWorkerB.RunWorkerAsync() ' => this should be triggered if the worker
                                        '    has already been stop.

    Else
        My_BgWorkerB.RunWorkerAsync()
    End If

原文

currently, i have this code: My_BgWorkerB is the Name of my BackGround Worker

    If My_BgWorkerB.IsBusy Then
        If My_BgWorkerB.WorkerSupportsCancellation Then
            My_BgWorkerB.CancelAsync()
        End If

        ' in this part i want to know if the background worker is already stopped
        ' so that i can start it again

        ' My_BgWorkerB.RunWorkerAsync() ' => this should be triggered if the worker
                                        '    has already been stop.

    Else
        My_BgWorkerB.RunWorkerAsync()
    End If

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骄傲 2024-12-30 13:28:57

您应该做的是检查 RunWorkerCompletedEventArgs

像这样的事情：

Private Sub My_BgWorkerB_RunWorkerCompleted(ByVal sender As Object, ByVal e As RunWorkerCompletedEventArgs) Handles My_BgWorkerB.RunWorkerCompleted
    If e.Cancelled Then
       My_BgWorkerB.RunWorkerAsync()  
    End If
End Sub

What you should do is check the RunWorkerCompletedEventArgs Cancelled property in your BGW's RunWorkerCompleted event handler. If it's true restart your BGW using the RunWorkerAsync() method.

Something like this:

Private Sub My_BgWorkerB_RunWorkerCompleted(ByVal sender As Object, ByVal e As RunWorkerCompletedEventArgs) Handles My_BgWorkerB.RunWorkerCompleted
    If e.Cancelled Then
       My_BgWorkerB.RunWorkerAsync()  
    End If
End Sub

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