public void Update(Person person)
{
using (BusinessEntities context = new BusinessEntities())
{
//显示输入新数据的信息
Display("Current", person);
var obj = context.Person.Where(x => x.Id == person.Id).First();
if (obj != null)
context.ApplyCurrentValues("Person", person);
//虚拟操作，保证数据能同时加入到上下文当中
Thread.Sleep(100);
context.SaveChanges();
}
}
