当
e.Command.CommandText = "UPDATE [职工表] SET [姓名] = @姓名,照片=@照片 WHERE [职工号] = @职工号"
正常
-----------------------------
当
e.Command.CommandText = "UPDATE [职工表] SET [姓名] = @姓名 WHERE [职工号] = @职工号"
不能更新数据库，不报错！