在Singleton类上创建事件 [英] Create Event on Singleton Class

问题描述

我有一个Windows Mobile 6.5（.net cf 3.5），它使用遵循以下模式的单例类：

I have a Windows Mobile 6.5 (.net cf 3.5) that uses a singleton class which follows this pattern:

public sealed class Singleton
{
    static readonly Singleton instance=new Singleton();

    // Explicit static constructor to tell C# compiler
    // not to mark type as beforefieldinit
    static Singleton()
    {
    }

    Singleton()
    {
    }

    public static Singleton Instance
    {
        get
        {
            return instance;
        }
    }
}

参考

我的课程用于从中间硬盘中收集GPS数据。我要在单例类上创建一个可以订阅的事件？例如。 MyClass.Instance.LocationChanged + = ...;

My class used to collect GPS data from the Intermediate drive. What I want is to create an event on the singleton class that I can subscribe to? E.g. MyClass.Instance.LocationChanged += ...;

任何帮助将不胜感激。

Mark

推荐答案

出了什么问题？

public sealed class Singleton
{
  ... your code ...

  public delegate LocationChangedEventHandler(object sender, LocationChangedEventArgs ea);  

  public event LocationChangedEventHandler LocationChanged;

  private void OnLocationChanged(/* args */)
  {
    if (LocationChanged != null)
      LocationChanged(this, new LocationChangedEventArgs(/* args */);
  }
}

public class LocationChangedEventArgs : EventArgs
{
  // TODO: implement
}

每当您要触发事件时，呼叫 OnLocationChanged 。

Call OnLocationChanged whenever you want to fire the event.

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