To cancel the update operation, set the collections, if necessary, before the values are passed to the data source.
A common way to use these collections is to HTML-encode the values supplied by the user before they are stored in the data source.
The visitors to a web site can typically be divided into two groups: the users and the administrators.
In data driven web sites, users are normally allowed to view data and administrators are allowed to add, edit or delete data.
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A Grid View Update Event Args object is passed to the event-handling method, which enables you to determine the index of the current row and to indicate that the update operation should be canceled.The Row Updating event is raised when a row's Update button is clicked, but before the Grid View control updates the row.This enables you to provide an event-handling method that performs a custom routine, such as canceling the update operation, whenever this event occurs.These properties will automatically render Edit, Update and Cancel buttons inside Grid View column.I am using Template Field’s Item Template and Edit Item Template for providing read only and editing interface of the same column in the Grid View.