How to disabling event firing in SharePoint 2010

Today, I tested whether event receiver fires or not when I use SPListItem's Update methods.
The results are here.


Methods                 event firing
Update()                   fired
SystemUpdate()             fired

SystemUpdate(false)        fired

UpdateOverwriteVersion()   fired

All methods fired !!

But I think people sometimes want not to fire a event receiver when a update method is used.

So, I would like to introduce how to disable event firing.

In SharePoint 2010, SPEventReceiverBase.DisableEventFiring Method and SPEventReceiverBase.EnableEventFiring Method are already obsolete. We need to use EventFiringEnabled Property.

http://msdn.microsoft.com/en-us/library/microsoft.sharepoint.speventreceiverbase.disableeventfiring.aspx

A sample code is here.

private void button1_Click(object sender, EventArgs e)
{
    const string siteUrl = "http://sp2010";
    SPSite site = new SPSite(siteUrl);
    SPWeb web = site.RootWeb;

    SPList list = web.Lists["Announcements"];
    SPListItem item = list.Items[3];

    HandleEventFiring handleEventFiring = new HandleEventFiring();
    handleEventFiring.DisableHandleEventFiring();

    try
    {
        item.Update();
    }
    finally
    {
        handleEventFiring.EnableHandleEventFiring();
    }
}

public class HandleEventFiring : SPItemEventReceiver
{

    public void DisableHandleEventFiring()
    {
        //obsolete
        //this.DisableEventFiring();
        this.EventFiringEnabled = false;
    }

    public void EnableHandleEventFiring()
    {
        //obsotete
        //this.EnableEventFiring();
        this.EventFiringEnabled = true;
    }
}

This summer, I plan to go forest hiking.