如何使用VB.net为编程创建的gridview添加编辑，更新和取消按钮操作？

I'm, trying to add a grid view to my web page programatically (using VB.net in Visual Studio 2012). im successful in creating a gridview and also added Edit, update and Cancel buttons to my grid. but im struck with adding event commands to these buttons. how to make this buttons work? right know button (edit/Update/Delete) action is not doing anything. below is the code... kindly help. Please help me with the code for Edit, Update and Cancel buttons for gridview (I'm, trying to add a grid view to my web page p