为什么当我为某一行单击按钮，却继续传递第一行的值

I would like to pass value from a chosen row to the controller action so that the value will be passed as a session. The passing of value to controller is working, but the thing is, when i press a certain row's button, it keeps on passing the value of the first row. How can i make so that each row's button passes the row's values respectively?I would like to pass value from a chosen row to