I’m doing a practice project for training; my handler has specifically forbidden paramaterization and security-oriented coding for now, in the interest of getting the basics down. That being said, I’ve got a gridview on my homepage with a hyperlink field that takes the user to a page where they can edit the row data in textboxes. The row is displayed by the “ProductId” column, as it is autoincremented and unique. The values display perfectly, so I know my query string is fine, but when I attempt to update using the button event, I get an error message that says