C#实现在线更新软件

通过某些手段后台更新软件。首先你要有一个放置新版本信息的网站

UpdateSoftwareForm.cs

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using CCWin;
using System.Net;
using System.Collections;
using System.IO;
using System.Xml;
using System.Diagnostics;
using System.Threading;
 
namespace WriteBook
{
  public partial class UpdateSoftwareForm : Skin_Metro
  {
    public UpdateSoftwareForm()
    {
      InitializeComponent();
    }
 
    #region 一些对象和变量
 
    //使用WebClient下载
    WebClient client = new WebClient();
    ArrayList downlist = new ArrayList();
    //当前版本
    string nowversion = null;
    //最新版本
    string latesversion = null;
 
    #endregion
 
    #region 获取版本号
 
    /// 

    /// 从服务器上获取最新的版本号
    /// 
    public void DownloadCheckUpdateXml()
    {
      try
      {
 //第一个参数是文件的地址,第二个参数是文件保存的路径文件名
 client.DownloadFile("http://bbs.cloudtour.tk/SoftwareDownload/WriteBook/WriteBook2.xml", "WriteBook2.xml");
      }
      catch
      {
 MessageBox.Show("没有检测到更新。", "提示");
 this.Close();
      }
    }
 
    /// 

    /// 获取本地软件的版本号
    /// 
    private void NowVersion()
    {
      nowversion = System.Reflection.Assembly.GetExecutingAssembly().GetName().Version.ToString() + "n";
      LocalText.Text = nowversion;
    }
 
    /// 

    /// 读取从服务器获取的最新版本号
    /// 
    public void LatestVersion()
    {
      try
      {
 if (File.Exists("WriteBook2.xml.xml"))
 {
   Xmldocument doc = new Xmldocument();
   //加载要读取的XML
   doc.Load("WriteBook2.xml.xml");
 
   //获得根节点
   XmlElement WriteBook = doc.documentElement;
 
   //获得子节点 返回节点的集合
   XmlNodeList Update = WriteBook.ChildNodes;
 
   foreach (XmlNode item in Update)
   {
     latesversion = item.InnerText;
   }
   LatestText.Text = latesversion;
 }
 else
 {
   MessageBox.Show("没有检测到更新。", "提示");
   this.Close();
 }
      }
      catch
      {
 this.Close();
      }
    }
 
    #endregion
 
    #region 初始化程序
 
    /// 

    /// 初始化程序
    /// 
    private void InitializeandInstall()
    {
      UpdateProgressBar.Value = 20;
      DownloadCheckUpdateXml();
      UpdateProgressBar.Value = 40;
      NowVersion();
      UpdateProgressBar.Value = 60;
      LatestVersion();
      UpdateProgressBar.Value = 80;
      DownloadInstall();
      UpdateProgressBar.Value = 100;
    }
 
    #endregion
 
    #region 安装and删除
 
    /// 

    /// 下载安装包
    /// 
    public void DownloadInstall()
    {
      try
      {
 if (nowversion == latesversion)
 {
   MessageBox.Show("您已经是最新版本。", "提示");
 }
 else if (nowversion != latesversion && File.Exists("WriteBook2.xml"))
 {
   MessageBox.Show("发现新版本，即将下载更新补丁。", "提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
   client.DownloadFile("http://bbs.cloudtour.tk/SoftwareDownload/WriteBook/WBsetup.exe", "WBsetup.exe");
   if (File.Exists("Setup.exe"))
   {
     InstallandDelete();
   }
   else
   {
     for (int i = 1; i < 3; i++)
     {
client.DownloadFile("http://bbs.cloudtour.tk/SoftwareDownload/WriteBook/WBsetup.exe", "WBsetup.exe");
     }
     MessageBox.Show("下载失败，请检查您的网络连接是否正常。", "提示");
     this.Close();
   }
 }
      }
      catch
      {
 MessageBox.Show("更新失败，没有发现新版本。", "提示");
 this.Close();
      }
    }
 
    /// 

    /// 安装及删除
    /// 
    private void InstallandDelete()
    {
      try
      {
 DialogResult dr = MessageBox.Show("下载更新成功，是否安装新更新？", "提示", MessageBoxButtons.YesNoCancel);
 if (dr == System.Windows.Forms.DialogResult.Yes)
 {
   //启动安装程序
   System.Diagnostics.Process.Start("WBsetup.exe");
   Thread td = new Thread(JudgeInstall);
   td.Start();
 }
 else { }
      }
      catch
      {
 MessageBox.Show("发生未知错误，更新失败。", "提示");
 this.Close();
      }
    }
 
    /// 

    /// 判断安装进程是否存在
    /// 
    public void JudgeInstall()
    {
      while (true)
      {
 Process[] processList = Process.GetProcesses();
 foreach (Process process in processList)
 {
   if (process.ProcessName == "WBsetup.exe") { }
   else
   {
     DialogResult dr = MessageBox.Show("更新成功，是否删除安装包？", "提示", MessageBoxButtons.YesNo);
     if (dr == System.Windows.Forms.DialogResult.Yes)
     {
File.Delete("WBsetup.exe");
File.Delete("WriteBook2.xml");
     }
   }
 }
      }
    }
 
    #endregion
 
    /// 

    /// 点击初始化程序
    /// 
    /// 
    /// 
    private void UpdateButton_Click(object sender, EventArgs e)
    {
      InitializeandInstall();
    }
  }
}

以上所述就是本文的全部内容了，希望大家能够喜欢。