中datagridveiw的更改你可以用数据库中的数据重新绑定datagridveiw在第一次做。如果您不更新数据库中的任何内容，那么您在datagridveiw上所做的所有更改都将丢失。

on undo button click event you can rebind the datagridveiw with the data in the database as you doing in first time. Then all the changes you did on datagridveiw will lost if you not update anything in the database.