委托：利用委托作为排序条件的例子

using System;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Web;
using System.Web.SessionState;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;

namespace AspNetTest.Common
{
    /**//// <summary>
    /// Define_Delegate 的摘要说明。
    /// </summary>
    public class Define_Delegate_BubbleSort : System.Web.UI.Page
    {
        private void Page_Load(object sender, System.EventArgs e)
        {
            //以下写法也可以，但需要将 SortOrderASC和SortOrderDESC改为非静态方法
            //DelegateSortApp dsa = new DelegateSortApp();
            //dsa.SortASC();
            //dsa.SortDESC();
            DelegateSortApp.SortASC();
            DelegateSortApp.SortDESC();
            
            // 在此处放置用户代码以初始化页面
        }

        Web 窗体设计器生成的代码#region Web 窗体设计器生成的代码
        override protected void OnInit(EventArgs e)
        {
            //
            // CODEGEN: 该调用是 ASP.NET Web 窗体设计器所必需的。
            //
            InitializeComponent();
            base.OnInit(e);
        }
        
        /**//// <summary>
        /// 设计器支持所需的方法 - 不要使用代码编辑器修改
        /// 此方法的内容。
        /// </summary>
        private void InitializeComponent()
        {    
            this.Load += new System.EventHandler(this.Page_Load);

        }
        #endregion
    }
    public class BubbleSort
    {
        public delegate bool Order(object first, object second);
        
        public void Sort(Array table, Order order)
        {
            if(order == null)
            {
                throw new ArgumentException();
            }
            bool NotAllSort = true;
            while(NotAllSort)
            {
                int pass = 1;
                NotAllSort = false;
                for(int i=0; i<table.Length-pass; i++)
                {
                    if(order(table.GetValue(i), table.GetValue(i+1)))
                    {
                        object temp = table.GetValue(i);
                        table.SetValue(table.GetValue(i+1), i);
                        table.SetValue(temp, i+1);
                        NotAllSort = true;
                    }
                }
                ++pass;
            }
        }
    }
    public class DelegateSortApp
    {
        static int[] SortTable = {5,4,6,2,8,9,1,3,7,0};
        public static void SortASC()
        {
            HttpContext.Current.Response.Write("原数据：");
            foreach(int i in SortTable)
            {
                HttpContext.Current.Response.Write(i + " ");
            }
            HttpContext.Current.Response.Write("<br>");
            HttpContext.Current.Response.Write("升序排序：");
            
            BubbleSort bubbleSort = new BubbleSort();
            BubbleSort.Order order = new BubbleSort.Order(SortOrderASC);
            bubbleSort.Sort(SortTable, order);
            foreach(int i in SortTable)
            {
                HttpContext.Current.Response.Write(i + " ");
            }
            HttpContext.Current.Response.Write("<br>");
        }
        public static void SortDESC()
        {
            HttpContext.Current.Response.Write("降序排序：");
            BubbleSort bubbleSort = new BubbleSort();
            BubbleSort.Order order = new BubbleSort.Order(SortOrderDESC);
            bubbleSort.Sort(SortTable, order);
            foreach(int i in SortTable)
            {
                HttpContext.Current.Response.Write(i + " ");
            }
        }
        public static bool SortOrderASC(object first, object second)
        {
            int firstInt = (int)first;
            int secondInt = (int)second;
            return firstInt > secondInt; 
        }
        public static bool SortOrderDESC(object first, object second)
        {
            int firstInt = (int)first;
            int secondInt = (int)second;
            return firstInt < secondInt; 
        }
    }
    
}