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.
Fortunately Sql Data Adapter allows you to execute updates in batches. number of rows to be treated as a single batch via Update Batch Size property.
Net while am trying to update the row it was not getting updated. Find Control("txt Name3"), Text Box) 'doupdate(txt Name1, txt Name2, txtname3, txt Name) 'con.
Instead, it throw an exception Object reference not set to an instance. Protected Sub Grid View1_Row Updating(By Val sender As Object, By Val e As System. Open() cmd = New My Sql Command("update login set username='" & txt Name1.
Then we set the Updated Data Source property of the Sql Command property to enumerated value of Update Row Source. The Updated Row Source property can control how the values returned from the data source are mapped back to the Data Set.
Setting this property to a value of None is necessary when using batch update feature of Data Adapter.
Search for use rowupdating:
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.