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Sharepoint spitemeventreceiver itemupdating

Requirement is to Set Item Level Permission on Document Library Items based on the field in the document library "Visible to Visitors". Technically, When this column set to True, We'll have to do nothing.When this column set to False, we'll have to break the inheritance and remove the visitors group from the Item's permissions.

They are used to perform some custom action after an event occurs.

These events are asynchronous because they need not happen immediately after the event is performed. SPWeb Event Receiver : This provides event handling whenever a site or a site collection is deleted or moved Each of the classes has some virtual methods which are to be over-ridden to perform our custom action. Methods under the class SPWeb Event Receiver handle site level events. Site Deleted – This occurs after a site collection is deleted.

Lets build a Event Receiver to set Item level permissions based on the field in the Library.

While developing any application we need to handle some events.

Field Updating – This occurs when a field is being updated in a list.

Methods under the class SPItem Event Receiver handle item level events. Item Added – This occurs after a new item is added to a list. Item Adding – This occurs before an item is added to a list. Item Attachment Added – This occurs after an attachment is added to a list. Item Attachment Adding – This occurs while an attachment is being added to a list.Item Updating – This occurs while an item is being updated.Methods under the class SPFeature Receiver handle events related to feature. Feature Activated – This occurs after a feature is activated.In this case, there is a flexibility of cancelling the event on some conditions so that the event that gets initiated will not occur.Asynchronous event receivers are also known as ‘After’ event receivers.Synchronous event receivers are also known as ‘Before’ event receivers.They are used to perform some custom action before an event occurs.Field Deleting – This occurs when a field is being deleted from a list.Field Updated – This occurs after a field is updated in a list.For example, when a new item is added to a list, we may need to perform some action like say, notifying the person who created the list item, or modifying the dependent entries in some other location etc.Handling of such events is facilitated by event receivers.

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