What are event receivers or event Handlers in SharePoint ?

 Posted by Bharathi Cherukuri on 8/31/2012 | Category: SharePoint Interview questions | Views: 3158 | Points: 40

Event Receivers or Event handlers are created to handle the basic actions or events against an item,list\library, a web or a site.
There are two kinds of events in sharepoint. They are:
1) Synchronous Events: Like Itemadding (not added yet), Uploading (document not uploaded yet) etc.
2) Asynchronous Events: ItemAdded (after item is added), Uploaded(after a document is uploaded)

Events receivers can be written to override an event.
For e.g. ItemAdded event to change the name of an Item once it is added.

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