A datakey represents the primary key field or field of a record that can uniquely identify it in a data-bound control. Row Index represents the index of the particular row.Many a times in our applications we use primary keys to get control of the particular record in the gridview. This enables you to provide an event-handling method that performs a custom routine, such as canceling the edit operation, whenever this event occurs.A Grid View Edit 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 edit operation should be canceled. Place Link Button Edit in Item Template and Link Button Update and Cancel in Edit Tamplate of Gridview's column. Fire Grid View's Row Editing event for Link Button Edit. Fire Grid View's Row Updating event for Link Button Update. Fire Grid View's Row Canceling Edit event for Link Button Cancel. Set Command Name propery of Link Buttons according to their respective event. Set Grid View's Data Key Names Property to record ID (ID=Primary/Unique key of student table) 7. event is raised when a row's Update button is clicked, but after the Grid View control updates the row.
This enables you to provide an event-handling method that performs a custom routine, such as checking the results of the update operation, whenever this event occurs.A Grid View Updated Event Args object is passed to the event-handling method, which enables you to determine the number of rows affected and any exceptions that might have occurred. You can also indicate whether the exception was handled in the event-handling method by setting the On Row Updated Row Canceling Edit On Row Canceling Edit Row Deleted On Row Deleted Row Deleting On Row Deleting Row Editing On Row Editing Row Updating On Row Updating Grid View Class System. event is raised when a row's Edit button is clicked, but before the Grid View control enters edit mode.In this example, I am going to retrieve values from categories table of Northwind database. Drag a Grid View into the Web Form and assign Data Key Names property with the primary key column i.e. In the gdview_Row Editing and gdview_Row Deleting event, we have used the below code to retrieve categoryid from datakey of Grid View, int catid = int.
How do I get the old values in a gridview row in the row_updating event?