public void RestoreMemento(ContactMemento memento) { if (memento != null) { ContactPeople = memento.ContactPeopleBack; } }
public void Calc() { List <ContactPerson> persons = new List <ContactPerson>() { new ContactPerson() { Name = "Learning Hard", MobileNum = "123445" }, new ContactPerson() { Name = "Tony", MobileNum = "234565" }, new ContactPerson() { Name = "Jock", MobileNum = "231455" } }; MobileOwner mobileOwner = new MobileOwner(persons); mobileOwner.Show(); Caretaker caretaker = new Caretaker(); caretaker.dic.Add(DateTime.Now.ToString(), mobileOwner.CreateMemento()); // 更改发起人联系人列表 Console.WriteLine("----移除最后一个联系人--------"); mobileOwner.ContactPeople.RemoveAt(2); mobileOwner.Show(); caretaker.dic.Add(DateTime.Now.ToString(), mobileOwner.CreateMemento());// 恢复到原始状态 Console.WriteLine("-------恢复联系人列表,请从以下列表选择恢复的日期------"); var keyCollection = caretaker.dic.Keys; foreach (string k in keyCollection) { Console.WriteLine("Key = {0}", k); } while (true) { Console.Write("请输入数字,按窗口的关闭键退出:"); int index = -1; try { index = Int32.Parse(Console.ReadLine()); } catch { Console.WriteLine("输入的格式错误"); continue; } ContactMemento contactMentor = null; if (index < keyCollection.Count) { mobileOwner.RestoreMemento(contactMentor); mobileOwner.Show(); } else { Console.WriteLine("输入的索引大于集合长度!"); } } }