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QuestionDataBindingComplete firing on form Visibility change Pin
bigbrownbeaver15-Jul-08 1:55
bigbrownbeaver15-Jul-08 1:55 
I have a DataGridView that runs hidden in the system tray, and when I unhide it the DataBindingComplete event fires anywhere between 3 and 8 times for the datagridview on the form, drastically slowing down the application. Is there something wrong with the databinding event? MSDN states that changes in the datasource will cause this event to fire. Why is changing the visibility firing it? This is the code for the system tray double click event.

Private Sub sysTray_MouseDoubleClick(ByVal sender As System.Object, ByVal e As System.Windows.Forms.MouseEventArgs) Handles sysTray.MouseDoubleClick
        Me.Visible = Not Me.Visible
        Me.ShowInTaskbar = Me.Visible
        Me.WindowState = FormWindowState.Normal
    End Sub


And here is the code in the databindingcomplete event:

Private Sub dgErrors_DataBindingComplete(ByVal sender As System.Object, ByVal e As System.Windows.Forms.DataGridViewBindingCompleteEventArgs) Handles dgErrors.DataBindingComplete
       Debug.WriteLine("Fired event: dgErrors_DataBindingComplete: by " + CType(sender, Control).Name + " event Type: " + e.ListChangedType.ToString())
End Sub


The code produces the following output when double clicking on the system tray icon:

Fired event: dgErrors_DataBindingComplete: by dgErrors event Type: Reset
Fired event: dgErrors_DataBindingComplete: by dgErrors event Type: Reset
Fired event: dgErrors_DataBindingComplete: by dgErrors event Type: Reset
Fired event: dgErrors_DataBindingComplete: by dgErrors event Type: Reset
Fired event: dgErrors_DataBindingComplete: by dgErrors event Type: Reset
Fired event: dgErrors_DataBindingComplete: by dgErrors event Type: Reset
Fired event: dgErrors_DataBindingComplete: by dgErrors event Type: Reset


I dont understand why it is firing 7 times. In fact I don't understand why it is firing at all.
I need another event for the datagrid that fires only once, or I need to fix what is happening here somehow, any suggestions?

Thanx in advance for answers
AnswerRe: DataBindingComplete firing on form Visibility change Pin
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