Question

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

Answer 1

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