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Since you are not using the datasource controls(which is a good thing), the Old Values and New Values collections will not be populated automatically.
So, here is some sample code that I use, and maybe it will help you: This goes in your Row Updating event Dim cell As Data Control Field Cell = Nothing 'This type will change if you are using Bound Fields 'The collection(s) have to be populated for EACH cell.
This enables you to provide an event-handling method that performs a custom routine, such as canceling the update operation, whenever this event occurs.Now we access this connection string on the page so we can open a connection with the relation database. The first one accesses the connection string and the other is for the SQL connection.Now we define a method for opening a connection with the relation database and returns a SQL connection object depending on the connection string that is passed as a parameter of the Sql Connection class constructor.w=150 150w, https://taditdash.files.wordpress.com/2014/06/gridview-cell-showing-updated-value.png? w=300 300w" sizes="(max-width: 416px) 100vw, 416px" /Event. If we move our mouse on to the variables, which hold the cell values, we can see the old value instead of new updated value (Refer the debugging Screen Shot at the Top).