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Question

动态创建一个delegate的定义还是动态创建他的一个实例？如果是前者：需要用CodeDom生成一个从MulticastDelegate继承的类；然后给他加上Invoke, BeginInvoke和EndInvoke三个方法，标注[MethodImpl(0, MethodCodeType=MethodCodeType.Runtime)]如果是后者，调用Delegate.CreateDelegate方法。

Answer 1

俺写过的例子
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.IO;
using System.Windows.Forms;
using ICSharpCode.SharpZipLib.Zip;
using System.Threading;
namespace zipTest
{    public partial class Form1 : Form
    {
        public delegate void MyProcesses(int idx, int donecount);        public Form1()
        {
            InitializeComponent();
        }        private void Processes(int idx, int donecount)
        {
            listView1.Items[idx].SubItems[2].Text = donecount.ToString();
        }        private void OnProcesses(int idx, int donecount)
        {  
            lock (this.listView1)
            {
                object[] pList = { idx, donecount };
                MyProcesses mi = new MyProcesses(this.Processes);
                listView1.BeginInvoke(mi, pList);
            }
        }
        private void button1_Click(object sender, EventArgs e)
        {
            listView1.Items.Clear();
            for (int i = 0; i < 5; i++)
            {
                ListViewItem item = new ListViewItem();
                item.Text = i.ToString();
                item.SubItems.Add("10");
                item.SubItems.Add("0");                listView1.Items.Add(item);                ZipTh th = new ZipTh(i, 10);
                th.Processes += new OnProcesses(OnProcesses);                th.StartThread();
            }
        }        private void listView1_SelectedIndexChanged(object sender, EventArgs e)
        {        }
    }
    public delegate void OnProcesses(int idx,int donecount);
    public class ZipTh
    {
        private int idx;
        private int count;
        public event OnProcesses Processes;        public ZipTh(int i, int c)
        {
            idx = i;
            count = c;
        }         public void doProcesses(int i, int c)
        {
            Processes(i, c);
        }
        public void Run()
        {
            int donecount = 0;
            for (int i = 0; i < count; i++)
            {
                ICSharpCode.SharpZipLib.Zip.FastZip zip = new ICSharpCode.SharpZipLib.Zip.FastZip();
                zip.CreateEmptyDirectories = true;
                zip.CreateZip(@"c:\" + idx.ToString() + @".zip", @"C:\temp", true, null);
                donecount++;
                doProcesses(idx,donecount);
            }
         
        }        public void StartThread()
        {
            Thread newThread;
            newThread = new Thread(new ThreadStart(Run));
            newThread.Start();
        }    }
}

Answer 2

同意qqchen79(知秋一叶)
如果是动态定义用CodeDom，如果是动态创建用Delegate，如果是动态调用用reflection