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.NET and JavaScript UI Controls
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UltraTabControlEventManager Class

Class for managing an UltraToolbars's events. It maintains an enabled flag for each event as well as a nested 'in progress' count and it exposes events for firing each event.
Syntax
'Declaration
 
Public Class UltraTabControlEventManager 
   Inherits Infragistics.Shared.EventManagerBase
public class UltraTabControlEventManager : Infragistics.Shared.EventManagerBase
Example
The following sample code illustrates how the event manager can be used to temporarily enable/disable events.

Imports Infragistics.Win
Imports Infragistics.Win.UltraWinTabs
Imports Infragistics.Win.UltraWinTabControl

Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click

    ' Get the tab controls'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.
    Dim eventManager As UltraTabControlEventManager

    eventManager = Me.ultraTabControl1.EventManager

    ' Disable the ActiveTabChanging\Changed and SelectedTabChanging\Changed events
    eventManager.SetEnabled(UltraTabControlEventId.ActiveTabChanging, False)
    eventManager.SetEnabled(UltraTabControlEventId.ActiveTabChanged, False)
    eventManager.SetEnabled(UltraTabControlEventId.SelectedTabChanging, False)
    eventManager.SetEnabled(UltraTabControlEventId.SelectedTabChanged, False)

    ' Call PerformAction to select the next tab.
    ' Note: This would normally cause the ActiveTabChanging\Changed 
    ' and SelectedTabChanging\Changed events to be raised. 
    ' However, since the above code disabled the events they won't be.
    Me.ultraTabControl1.PerformAction(UltraTabControlAction.SelectNextTab)

    ' Re-enable the events
    eventManager.SetEnabled(UltraTabControlEventId.ActiveTabChanging, True)
    eventManager.SetEnabled(UltraTabControlEventId.ActiveTabChanged, True)
    eventManager.SetEnabled(UltraTabControlEventId.SelectedTabChanging, True)
    eventManager.SetEnabled(UltraTabControlEventId.SelectedTabChanged, 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 eventManager.IsEnabled(UltraTabControlEventId.ActiveTabChanging) = False Then
        eventManager.SetEnabled(UltraTabControlEventId.ActiveTabChanging, True)
    End If

    ' The 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 eventManager.IsEnabled(UltraTabControlEventGroup.BeforeEvents) = False Then
        eventManager.SetEnabled(UltraTabControlEventGroup.BeforeEvents, True)
    End If

    eventManager.SetEnabled(UltraTabControlEventGroup.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(UltraTabControlEventId.SelectedTabChanging) = True Then

        ' ... 

    End If

End Sub
using System.Diagnostics;
using Infragistics.Win;
using Infragistics.Win.UltraWinTabs;
using Infragistics.Win.UltraWinTabControl;

private void button1_Click(object sender, System.EventArgs e)
{

	// Get the tab controls'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.
	UltraTabControlEventManager eventManager = this.ultraTabControl1.EventManager;

	// Disable the ActiveTabChanging\Changed and SelectedTabChanging\Changed events
	eventManager.SetEnabled( UltraTabControlEventId.ActiveTabChanging, false );
	eventManager.SetEnabled( UltraTabControlEventId.ActiveTabChanged, false );
	eventManager.SetEnabled( UltraTabControlEventId.SelectedTabChanging, false );
	eventManager.SetEnabled( UltraTabControlEventId.SelectedTabChanged, false );

	// Call PerformAction to select the next tab.
	// Note: This would normally cause the ActiveTabChanging\Changed 
	// and SelectedTabChanging\Changed events to be raised. 
	// However, since the above code disabled the events they won't be.
	this.ultraTabControl1.PerformAction( UltraTabControlAction.SelectNextTab );

	// Re-enable the events
	eventManager.SetEnabled( UltraTabControlEventId.ActiveTabChanging, true );
	eventManager.SetEnabled( UltraTabControlEventId.ActiveTabChanged, true );
	eventManager.SetEnabled( UltraTabControlEventId.SelectedTabChanging, true );
	eventManager.SetEnabled( UltraTabControlEventId.SelectedTabChanged, 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 )
		eventManager.AllEventsEnabled = true;

	// The event manager also exposes an 'IsEnabled' method
	// to see if an event is enabled or disbled.
	if ( !eventManager.IsEnabled(UltraTabControlEventId.ActiveTabChanging ) )
		eventManager.SetEnabled(UltraTabControlEventId.ActiveTabChanging, true );

	// The 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 ( !eventManager.IsEnabled(UltraTabControlEventGroup.BeforeEvents ) )
		eventManager.SetEnabled(UltraTabControlEventGroup.BeforeEvents, true );

	eventManager.SetEnabled(UltraTabControlEventGroup.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( UltraTabControlEventId.SelectedTabChanging ) )
	{
		// ... 
	}
}
Requirements

Target Platforms: Windows 10, Windows 8.1, Windows 8, Windows 7, Windows Server 2012, Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

See Also