2
目標:有一個單發佈活動,並允許任何類認購/聽那些事件C#如何創建一個發佈事件和類訂閱的單身人士?
問題:我無法弄清楚如何做到這一點。下面的代碼是非法的,但它purveys什麼,我試圖做
TransmitManager類 - 出版商
//Singleton
public sealed class TransmitManager
{
delegate void TransmitManagerEventHandler(object sender);
public static event TransmitManagerEventHandler OnTrafficSendingActive;
public static event TransmitManagerEventHandler OnTrafficSendingInactive;
private static TransmitManager instance = new TransmitManager();
//Singleton
private TransmitManager()
{
}
public static TransmitManager getInstance()
{
return instance;
}
public void Send()
{
//Invoke Event
if (OnTrafficSendingActive != null)
OnTrafficSendingActive(this);
//Code connects & sends data
//Invoke idle event
if (OnTrafficSendingInactive != null)
OnTrafficSendingInactive(this);
}
}
測試類 - 事件訂閱
public class Test
{
TrasnmitManager tm = TransmitManager.getInstance();
public Test()
{
//I can't do this below. What should my access level be to able to do this??
tm.OnTrafficSendingActive += new TransmitManagerEventHandler(sendActiveMethod);
}
public void sendActiveMethod(object sender)
{
//do stuff to notify Test class a "send" event happend
}
}