GridEventIds Enumeration

Imports Infragistics.Win.UltraWinGrid

Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click

    If Me.ultraGrid1.ActiveRow Is Nothing Then Return

    Dim eventManager As GridEventManager

    ' Get the grid's event manager.
    ' The event manager is used to temporarily disable events
    ' to prevent them from being raised. This can be very
    ' convenient in a situation where one or more properties
    ' are being set in code and the events they would normally 
    ' raise would cause unnecessary or counter-productive
    ' code to be executed.
    '
    ' Note: All events are enabled by default.
    eventManager = Me.ultraGrid1.EventManager

    ' Disable the Before/AfterSelectChange events
    eventManager.SetEnabled(GridEventIds.BeforeSelectChange, False)
    eventManager.SetEnabled(GridEventIds.AfterSelectChange, False)

    ' Toggle the selection state of the active row.
    ' Note: This would normally cause the Before/AfterSelectChange 
    ' events to be raised. However, since the above code disabled
    ' the events they won't be.
    Me.ultraGrid1.ActiveRow.Selected = Not Me.ultraGrid1.ActiveRow.Selected

    ' Re-enable the Before/AfterSelectChange events
    eventManager.SetEnabled(GridEventIds.BeforeSelectChange, True)
    eventManager.SetEnabled(GridEventIds.AfterSelectChange, True)

    ' The 'AllEventsEnabled' property lets you enable/disable
    ' all events will a single line of code. If any event is 
    ' disabled the 'AllEventsEnabled' property returns false.
    If eventManager.AllEventsEnabled = False Then
        eventManager.AllEventsEnabled = True
    End If

    ' The event manager also exposes an 'IsEnabled' method
    ' to see if an event is enabled or disbled.
    If False = eventManager.IsEnabled(GridEventIds.BeforeSelectChange) Then
        eventManager.SetEnabled(GridEventIds.BeforeSelectChange, True)
    End If

    ' The grid event manager also exposes overloaded 
    ' 'IsEnabled' and 'SetEnabled' methods that take an 
    ' event group so that, for example all 'Before' or all
    ' 'After' events can be enabled/disabled. If any event
    ' in the group is disabled the 'IsEnabled' method returns
    ' false.
    If False = eventManager.IsEnabled(EventGroups.BeforeEvents) Then
        eventManager.SetEnabled(EventGroups.BeforeEvents, True)
    End If

    eventManager.SetEnabled(EventGroups.AfterEvents, True)

    ' The 'InProgress' method will return true if the 
    ' specified event is currently being raised. This
    ' is often helpful in methods that can be called
    ' from various points in an application to determine
    ' what is triggering the call.
    If eventManager.InProgress(GridEventIds.BeforeSelectChange) Then
        ' ... 
    End If

    ' The UltraCombo and UltraDropDown controls also expose 
    ' event managers for their custom events. However,
    ' since they have considerably fewer events they don't
    ' expose overloaded 'IsEnabled' and 'SetEnabled' methods 
    ' to control groups of events.
    Dim comboManager As ComboEventManager
    comboManager = Me.ultraCombo1.EventManager
    comboManager.SetEnabled(ComboEventIds.BeforeDropDown, True)

    Dim dropDownManager As DropDownEventManager
    dropDownManager = Me.UltraDropDown1.EventManager
    dropDownManager.SetEnabled(DropDownEventIds.AfterCloseUp, True)

End Sub