我正在链接到以下问题 – >
https://stackoverflow.com/a/2550935/46724
特别是Jon Skeet的代码:
特别是Jon Skeet的代码:
public sealed class Singleton { private static readonly Singleton instance = new Singleton(); public static Singleton Instance { get { return instance; } } static Singleton() {} private Singleton() {} }
我想知道的是我在初始化时需要将逻辑放在哪里?私有或静态构造函数?按逻辑,我的意思是我的Singleton是我的DapperLite连接所以我需要像这样初始化映射:
Database = new SqliteDatabase<int>(myConn); Database.Init();
编辑:我被困在Compact Framework 3.5和VS 2008上以供参考.
解决方法
如果您的类中需要任何静态字段,则应在此构造函数中初始化静态Singleton(){}以用于任何其他实例字段或属性,它应该是私有的Singleton(){}
有关更多信息,请查看以下代码
有关更多信息,请查看以下代码
public class Bus { // Static variable used by all Bus instances. // Represents the time the first bus of the day starts its route. protected static readonly DateTime globalStartTime; // Property for the number of each bus. protected int RouteNumber { get; set; } // Static constructor to initialize the static variable. // It is invoked before the first instance constructor is run. static Bus() { globalStartTime = DateTime.Now; // The following statement produces the first line of output,// and the line occurs only once. Console.WriteLine("Static constructor sets global start time to {0}",globalStartTime.ToLongTimeString()); } // Instance constructor. public Bus(int routeNum) { RouteNumber = routeNum; Console.WriteLine("Bus #{0} is created.",RouteNumber); } // Instance method. public void Drive() { TimeSpan elapsedTime = DateTime.Now - globalStartTime; // For demonstration purposes we treat milliseconds as minutes to simulate // actual bus times. Do not do this in your actual bus schedule program! Console.WriteLine("{0} is starting its route {1:N2} minutes after global start time {2}.",this.RouteNumber,elapsedTime.TotalMilliseconds,globalStartTime.ToShortTimeString()); } } class TestBus { static void Main() { // The creation of this instance activates the static constructor. Bus bus1 = new Bus(71); // Create a second bus. Bus bus2 = new Bus(72); // Send bus1 on its way. bus1.Drive(); // Wait for bus2 to warm up. System.Threading.Thread.Sleep(25); // Send bus2 on its way. bus2.Drive(); // Keep the console window open in debug mode. System.Console.WriteLine("Press any key to exit."); System.Console.ReadKey(); } }
所以在你的情况下是实例初始化
private Singleton() { Database = new SqliteDatabase<int>(myConn); Database.Init(); }
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