static void Main(string[] args)
{
SingletonClass singleton = SingletonClass.Instance;
singleton.Jest = true;
singleton.Nazwa = "Kłamca";
Console.WriteLine(" Ksiązka pod tytułem : " + singleton.Nazwa + "\n Czy najduje się w bazie : " + singleton.Jest + "\n");
SingletonClass singleton2 = SingletonClass.Instance;
singleton2.Jest = false;
Console.WriteLine(" Ksiązka pod tytułem : " + singleton2.Nazwa + "\n Czy najduje się w bazie : " + singleton2.Jest);
Console.ReadKey();
}
/// <summary>
/// 3、定义公有方法来提供该类的唯一全局访问点
/// </summary>
/// <returns></returns>
public static SingletonClass GetInstance()
{
// 当第一个线程运行到这里时，此时会对locker对象 "加锁"，
// 当第二个线程运行该方法时，首先检测到locker对象为"加锁"状态，该线程就会挂起等待第一个线程解锁
// lock语句运行完之后（即线程运行完之后）会对该对象"解锁"
// 双重锁定只需要一句判断就可以了
if (unniqueInstance == null)
{
lock (locker)
{
// 如果类的实例不存在则创建，否则直接返回
if (unniqueInstance == null)
{
unniqueInstance = new SingletonClass();
}
}
}
return(unniqueInstance);
}
/// <summary>
/// The main Entry point of the project
/// </summary>
/// <param name="args"></param>
static void Main(string[] args)
{
Console.WriteLine("Singleton pattern Demo");
Console.WriteLine(SingletonClass.myInt);
Console.WriteLine("Trying to create instance s1.");
SingletonClass s1 = SingletonClass.Instance;
Console.WriteLine("Trying to create instance s1");
SingletonClass s2 = SingletonClass.Instance;
if (s1 == s2)
{
Console.WriteLine("only one instance exists.");
}
else
{
Console.WriteLine("Different instance exists");
}
Console.Read();
}
public static SingletonClass GetInstance()
{
///方法1： 多线程下不可取
//if (_singleton == null)
//{
// _singleton = new SingletonClass();
//}
///方法2： 双重if 加锁的方式
if (_singleton == null)
{
lock (lockObj)
{
if (_singleton == null)
{
_singleton = new SingletonClass();
}
}
}
return(_singleton);
}
private static void GetSingleton()
{
_instance = new SingletonClass();
}
static void Main(string[] args)
{
SingletonClass sc = SingletonClass.GetInstance();
//SingletonClass sc1 =new SingletonClass();
}
public static void TestStaticAndSingleton(SingletonClass singleton)
{
}
private void Button_ShowClick(object sender, RoutedEventArgs e)
{
SingletonClass show = SingletonClass.Instance;
MessageBox.Show(show.Ukaz());
}
private void Button_SaveClick(object sender, RoutedEventArgs e)
{
SingletonClass save = SingletonClass.Instance;
save.Pridat(name.Text, surename.Text, number.Text, date.Text);
}
