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   源码介绍

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自动升级程序，亲测可用，希望帮助到大家。继续上传

操作说明：
配置网络地址为如下格式：http://localhost/cmsm/UpdateList.xml
程序通过比对UpdateList.xml在服务器上的和本地的不同，来下载需要更新的文件
需要更新的文件需放在UpdateList.xml同一个目录下

using System;
using System.Web;
using System.IO;
using System.Net;
using System.Xml;
using System.Collections;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.ComponentModel;
using System.Windows.Forms;

namespace AutoUpdate
{
    public class AppUpdater:IDisposable
    {
        #region 成员与字段属性
        private string _updaterUrl;
        private bool disposed = false;
        private IntPtr handle;
        private Component component = new Component();
        [System.Runtime.InteropServices.DllImport("Kernel32")]
        private extern static Boolean CloseHandle(IntPtr handle);


        public string UpdaterUrl
        {
            set { _updaterUrl = value; }
            get { return this._updaterUrl; }
        }
        #endregion

        /// <summary>
        /// AppUpdater构造函数
        /// </summary>
        public AppUpdater()
        {
            this.handle = handle;
        }
        public void Dispose()
        {
            Dispose(true);
            GC.SuppressFinalize(this);
        }
        private void Dispose(bool disposing)
        {
            if (!this.disposed)
            {
                if (disposing)
                {

                    component.Dispose();
                }
                CloseHandle(handle);
                handle = IntPtr.Zero;
            }
            disposed = true;
        }

        ~AppUpdater()
        {
            Dispose(false);
        }


        /// <summary>
        /// 检查更新文件
        /// </summary>
        /// <param name="serverXmlFile"></param>
        /// <param name="localXmlFile"></param>
        /// <param name="updateFileList"></param>
        /// <returns></returns>
        public int CheckForUpdate(string serverXmlFile, string localXmlFile, out Hashtable updateFileList)
        {
            updateFileList = new Hashtable();
            if (!File.Exists(localXmlFile) || !File.Exists(serverXmlFile))
            {
                return -1;
            }

            XmlFiles serverXmlFiles = new XmlFiles(serverXmlFile);
            XmlFiles localXmlFiles = new XmlFiles(localXmlFile);

            XmlNodeList newNodeList = serverXmlFiles.GetNodeList("AutoUpdater/Files");
            XmlNodeList oldNodeList = localXmlFiles.GetNodeList("AutoUpdater/Files");

            int k = 0;
            for (int i = 0; i < newNodeList.Count; i  )
            {
                string[] fileList = new string[3];

                string newFileName = newNodeList.Item(i).Attributes["Name"].Value.Trim();
                string newVer = newNodeList.Item(i).Attributes["Ver"].Value.Trim();

                ArrayList oldFileAl = new ArrayList();
                for (int j = 0; j < oldNodeList.Count; j  )
                {
                    string oldFileName = oldNodeList.Item(j).Attributes["Name"].Value.Trim();
                    string oldVer = oldNodeList.Item(j).Attributes["Ver"].Value.Trim();

                    oldFileAl.Add(oldFileName);
                    oldFileAl.Add(oldVer);

                }
                int pos = oldFileAl.IndexOf(newFileName);
                if (pos == -1)
                {
                    fileList[0] = newFileName;
                    fileList[1] = newVer;
                    updateFileList.Add(k, fileList);
                    k  ;
                }
                else if (pos > -1 && newVer.CompareTo(oldFileAl[pos   1].ToString()) > 0)
                {
                    fileList[0] = newFileName;
                    fileList[1] = newVer;
                    updateFileList.Add(k, fileList);
                    k  ;
                }

            }
            return k;
        }

        /// <summary>
        /// 检查更新文件
        /// </summary>
        /// <param name="serverXmlFile"></param>
        /// <param name="localXmlFile"></param>
        /// <param name="updateFileList"></param>
        /// <returns></returns>
        public int CheckForUpdate()
        {
            string localXmlFile = Application.StartupPath   "\\UpdateList.xml";
            if (!File.Exists(localXmlFile))
            {
                return -1;
            }

            XmlFiles updaterXmlFiles = new XmlFiles(localXmlFile);


            string tempUpdatePath = Environment.GetEnvironmentVariable("Temp")   "\\"   "_"   updaterXmlFiles.FindNode("//Application").Attributes["applicationId"].Value   "_"   "y"   "_"   "x"   "_"   "m"   "_"   "\\";
            this.UpdaterUrl = updaterXmlFiles.GetNodeValue("//Url")   "/UpdateList.xml";
            this.DownAutoUpdateFile(tempUpdatePath);

            string serverXmlFile = tempUpdatePath   "\\UpdateList.xml";
            if (!File.Exists(serverXmlFile))
            {
                return -1;
            }

            XmlFiles serverXmlFiles = new XmlFiles(serverXmlFile);
            XmlFiles localXmlFiles = new XmlFiles(localXmlFile);

            XmlNodeList newNodeList = serverXmlFiles.GetNodeList("AutoUpdater/Files");
            XmlNodeList oldNodeList = localXmlFiles.GetNodeList("AutoUpdater/Files");

            int k = 0;
            for (int i = 0; i < newNodeList.Count; i  )
            {
                string[] fileList = new string[3];

                string newFileName = newNodeList.Item(i).Attributes["Name"].Value.Trim();
                string newVer = newNodeList.Item(i).Attributes["Ver"].Value.Trim();

                ArrayList oldFileAl = new ArrayList();
                for (int j = 0; j < oldNodeList.Count; j  )
                {
                    string oldFileName = oldNodeList.Item(j).Attributes["Name"].Value.Trim();
                    string oldVer = oldNodeList.Item(j).Attributes["Ver"].Value.Trim();

                    oldFileAl.Add(oldFileName);
                    oldFileAl.Add(oldVer);

                }
                int pos = oldFileAl.IndexOf(newFileName);
                if (pos == -1)
                {
                    fileList[0] = newFileName;
                    fileList[1] = newVer;
                    k  ;
                }
                else if (pos > -1 && newVer.CompareTo(oldFileAl[pos   1].ToString()) > 0)
                {
                    fileList[0] = newFileName;
                    fileList[1] = newVer;
                    k  ;
                }

            }
            return k;
        }
        /// <summary>
        /// 返回下载更新文件的临时目录
        /// </summary>
        /// <returns></returns>
        public void DownAutoUpdateFile(string downpath)
        {
            if (!System.IO.Directory.Exists(downpath))
                System.IO.Directory.CreateDirectory(downpath);
            string serverXmlFile = downpath   @"/UpdateList.xml";

            try
            {
                WebRequest req = WebRequest.Create(this.UpdaterUrl);
                WebResponse res = req.GetResponse();
                if (res.ContentLength > 0)
                {
                    try
                    {
                        WebClient wClient = new WebClient();
                        wClient.DownloadFile(this.UpdaterUrl, serverXmlFile);
                    }
                    catch
                    {
                        return;
                    }
                }
            }
            catch
            {
                return;
            }
            //return tempPath;
        }
    }
}