[转]数据下载（二）

using System;
using System.Collections.Generic;
using System.Text;
using System.Net;
using System.IO;

namespace prjDownLoad
{
    class Program
    {
        static void Main(string[] args)
        {
            //Version2.0
            //使用WebClient来下载
            WebClient wc = new WebClient();
            //注册当文件下载完成以后触发的事件
            wc.DownloadFileCompleted += new System.ComponentModel.AsyncCompletedEventHandler(wc_DownloadFileCompleted);
            //注册文件在下载过程中触发的事件
            wc.DownloadProgressChanged += new DownloadProgressChangedEventHandler(wc_DownloadProgressChanged);
            //开始异步下载文件
            wc.DownloadFileAsync(new Uri("http://blog.sina.com.cn/dalishuishou"), "c:\\bb.txt");
            Console.ReadLine();
            //这种做法可以在下载的过程中取消。
            //使用CancelAsync可以取消下载
           
        }

        static void wc_DownloadProgressChanged(object sender, DownloadProgressChangedEventArgs e)
        {
            //打印下载的字节数
            Console.WriteLine(string.Format("已经下载了{0}字节",e.BytesReceived));
            //打印下载的百分比
            Console.WriteLine(string.Format("已经完成的百分比：{0}%",e.ProgressPercentage));
        }

        static void wc_DownloadFileCompleted(object sender, System.ComponentModel.AsyncCompletedEventArgs e)
        {
            Console.WriteLine("下载完成");
        }
    }
}

转摘自:http://blog.sina.com.cn/s/blog_49458c270100gpyt.html