代码如下：

///
/// 进度条 ProgressBar
/// www.
///
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Net;
using System.Threading;
using System.Diagnostics;
 
namespace Update
{
    public partial class FrmUpdate : Form
    {
        //设置进度条的委托
        public delegate void SetProgressDelegate(int maximum, int value, string msg);
        //声明进度条事件
        public event SetProgressDelegate SetProgress;
        //关闭进度条的委托
        public delegate void CloseProgressDelegate();
        //声明关闭进度条事件
        public event CloseProgressDelegate CloseProgress;
        UpdateService.Service service = new UpdateService.Service();//webservice服务
        public FrmUpdate()
        {
            InitializeComponent();
        }
 
        private void FrmUpdate_Load(object sender, EventArgs e)
        {
            try
            {
                //用子线程工作
                Thread t = new Thread(new ThreadStart(DownLoad));
                t.IsBackground = true;//设为后台线程
                t.Start();
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message);
            }
        }
        /// 
        /// 下载更新
        /// 
        private void DownLoad()
        {
            try
            {
                SetProgress += new SetProgressDelegate(FrmUpdate_SetProgress);
                string url = service.GetUrl();//获取下载地址
                string[] files = service.GetFiles();//获取下载文件数组
                WebClient wc = new WebClient();
                for (int i = 0; i < files.Length; i++)
                {
                    wc.DownloadFile(url + files[i], files[i]);//下载
                    FrmUpdate_SetProgress(files.Length, i + 1, files[i] + "(" + (i + 1).ToString() + "/" + files.Length + ")");//调用设置进度条事件
                }
                wc.Dispose();
                CloseProgress += new CloseProgressDelegate(FrmUpdate_CloseProgress);
                FrmUpdate_CloseProgress();//调用关闭进度条事件
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message);
            }
        }
        /// 
        /// 实现设置进度条事件
        /// 
        /// 进度条最大值
        /// 进度条当前值
        private void FrmUpdate_SetProgress(int maximum, int value, string msg)
        {
            if (this.InvokeRequired)
            {
                this.Invoke(new SetProgressDelegate(FrmUpdate_SetProgress), new object[] { maximum, value, msg });
            }
            else
            {
                this.progressBar1.Maximum = maximum;//设置进度条最大值
                this.progressBar1.Value = value;//设置进度条当前值
                label1.Text = msg;//设置显示的信息
            }
        }
 
        /// 
        /// 实现关闭进度条事件
        /// 
 /// www.
        private void FrmUpdate_CloseProgress()
        {
            if (this.InvokeRequired)
            {
                this.Invoke(new CloseProgressDelegate(FrmUpdate_CloseProgress), null);
            }
            else
            {
                MessageBox.Show("升级成功！");
                IniClass ini = new IniClass(Application.StartupPath + @"Update.ini");
                string serviceVersion = service.GetVersion();//服务端版本
                ini.IniWriteValue("update", "version", serviceVersion);//更新成功后将版本写入配置文件
                Application.Exit();//退出升级程序
                Process.Start("Main.exe");//打开主程序Main.exe
            }
        }
    }
}

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