class1.cs

提供了大量初学CSharp的示例

using System;

namespace CallBackTest
{
	class DBConnection 
	{
		private string name;
		public DBConnection(string name)
		{
			this.name = name;
		}

		public String Name
		{
			get
			{
				return this.name;
			}
			set
			{
				this.name = value;
			}
		}
	}

	class DBManager
	{
		static DBConnection[] activeConnections;
		public void AddConnections()
		{
			activeConnections = new DBConnection[5];
			for (int i=0; i<5; i++)
			{
				activeConnections[i] = new DBConnection("DBConnection " + (i + 1));
			}
		}

		public delegate void EnumConnections(DBConnection conn);

		public static void AddConnectionCallBack(EnumConnections callback)
		{
			foreach( DBConnection conn in activeConnections)
			{
				callback(conn);
			}
		}
	}

	class DelegateApp
	{
		public static void ActiveConnectionCallBack(DBConnection conn)
		{
			Console.WriteLine("Callback method called for " + conn.Name);
		}
		public static void Main()
		{
			DBManager dbMgr = new DBManager();
			dbMgr.AddConnections();
			CallBackTest.DBManager.EnumConnections theCallBack = new CallBackTest.DBManager.EnumConnections(ActiveConnectionCallBack);
			DBManager.AddConnectionCallBack(theCallBack);
			
		}
	}
}