Adding Validation Controls to the Editing and Inserting Interfaces:
Step 3- Adding the Validation Controls to the GridView's EditItemTemplates
This step of the VIDEO TUTORIAL will familiarize on how to add validation controls to the editing interface of the GridView’s EditItemTemplates. A RequiredFieldValidator to enforce the ProductName and a CompareFieldValidator to enforce proper format the value to be entered in the UnitPrice field are added. In addition, a message label for warning the end user with any error messages will also be added. For detailed information and source code for this step, please refer to the original article.