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H-SC asked
Last Modified: 2012-05-10
I have a form that when a button is clicked it triggers another form to popup and reads "Waiting" with an animated spinning arrows gif  
The problem is that when the waiting form is displayed the gif is moving then stops and then moves random.  I think the process, LocalDataCache1SyncAgent() which sync's local sql db to server sql 2005 on the parent form seems to be the problem, but am not sure.  I have tried progress bar and it does the same thing, just does not seem to have movement after the process starts on the parent.  I have even tried starting the process off on the parent form with ..Application.DoEvents() and still does not work..

Any ideas to get a continus smooth running gif while the parent process runs would be greatly appreciated.
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The problem is that both forms run in the same thread, so the animation of the first form is blocked by the processing done by the second form.

The solution is to use a backgroundWorker, either in the parent form to call the second one:
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        Button1.Image =anim 'Animation gif
    End Sub

    Private Sub BackgroundWorker1_DoWork(ByVal sender As Object, ByVal e As System.ComponentModel.DoWorkEventArgs) Handles BackgroundWorker1.DoWork
        Dim f2 As New Form2
    End Sub

Or (more efficient in my opinion) use the backgroundWorker in the second form:

Private Sub Form2_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
    End Sub

Private Sub BackgroundWorker1_DoWork(ByVal sender As Object, ByVal e As System.ComponentModel.DoWorkEventArgs) Handles BackgroundWorker1.DoWork
     'Do the necessary processing
    End Sub

    End Sub
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Many thanks!  Simply brilliant, not sure why I did not think of the background worker...  It is working smooth!

thanks again

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