public static PhoneBookManager CreateMangerInstance() //반환타입이 PhoneBookManager인 메서드 생성, static 을 붙여서 인스턴스 생성 없이 부름
{
if (inst == null)
{
inst = new PhoneBookManager(); //inst가 널이면 새로운 PhoneBookManager()생성
}
return(inst); //이미 생성되었다면 원래있던 inst 전달
}
static void Main(string[] args)
{
PhoneBookManager manager = PhoneBookManager.CreateMangerInstance(); //싱글톤
//manager.ReadToFile();
while (true)
{
try
{
int choice;
while (true)
{
manager.ShowMenu();
if (int.TryParse(Console.ReadLine(), out choice))
{
if (choice < 1 || choice > 6)
{
throw new MenuChoiceException(choice);
}
else
{
break;
}
}
}
switch (choice)
{
case 1: manager.InputData(); break;
case 2: manager.ListData(); break;
case 3: manager.SearchData(); break;
case 4: manager.SortData(); break;
case 5: manager.DeleteData(); break;
case 6: manager.WriteToFile();
Console.WriteLine("프로그램을 종료합니다"); return;
}
}
catch (MenuChoiceException err)
{
err.ShowWrongChoice();
}
catch (Exception err)
{
Console.WriteLine(err.Message);
}
}
}