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
 
    /// <summary>
    /// 从服务器上获取最新的版本号
    /// </summary>
    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();
      }
    }
 
    /// <summary>
    /// 获取本地软件的版本号
    /// </summary>
    private void nowversion()
    {
      nowversion = system.reflection.assembly.getexecutingassembly().getname().version.tostring() + "\n";
      localtext.text = nowversion;
    }
 
    /// <summary>
    /// 读取从服务器获取的最新版本号
    /// </summary>
    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
 
    /// <summary>
    /// 初始化程序
    /// </summary>
    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
 
    /// <summary>
    /// 下载安装包
    /// </summary>
    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();
      }
    }
 
    /// <summary>
    /// 安装及删除
    /// </summary>
    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();
      }
    }
 
    /// <summary>
    /// 判断安装进程是否存在
    /// </summary>
    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
 
    /// <summary>
    /// 点击初始化程序
    /// </summary>
    /// <param name="sender"></param>
    /// <param name="e"></param>
    private void updatebutton_click(object sender, eventargs e)
    {
      initializeandinstall();
    }
  }
}

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