winform、C# 自动更新

用IIS或者是Tomcat搭建一个Web服务器，因为没有涉及到动态页面，所以用什么服务器无所谓，网上有太多资料，这里不再赘述。

废话不多说，直接上代码。

HttpHelper, 访问网页，下载文件等

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

namespace AutoUpdate
{
    class HttpHelper
    {

        //以GET方式抓取远程页面内容
        public static string Get_Http(string tUrl)
        {
            string strResult;
            try
            {
                HttpWebRequest hwr = (HttpWebRequest)HttpWebRequest.Create(tUrl);
                hwr.Timeout = ;
                HttpWebResponse hwrs = (HttpWebResponse)hwr.GetResponse();
                Stream myStream = hwrs.GetResponseStream();
                StreamReader sr = new StreamReader(myStream, Encoding.Default);
                StringBuilder sb = new StringBuilder();
                while (- != sr.Peek())
                {
                    sb.Append(sr.ReadLine() + "\r\n");
                }
                strResult = sb.ToString();
                hwrs.Close();
            }
            catch (Exception ee)
            {
                strResult = ee.Message;
            }
            return strResult;
        }
        //以POST方式抓取远程页面内容
        //postData为参数列表
        public static string Post_Http(string url, string postData, string encodeType)
        {
            string strResult = null;
            try
            {
                Encoding encoding = Encoding.GetEncoding(encodeType);
                byte[] POST = encoding.GetBytes(postData);
                HttpWebRequest myRequest = (HttpWebRequest)WebRequest.Create(url);
                myRequest.Method = "POST";
                myRequest.ContentType = "application/x-www-form-urlencoded";
                myRequest.ContentLength = POST.Length;
                Stream newStream = myRequest.GetRequestStream();
                newStream.Write(POST, , POST.Length); //设置POST
                newStream.Close();
                // 获取结果数据
                HttpWebResponse myResponse = (HttpWebResponse)myRequest.GetResponse();
                StreamReader reader = new StreamReader(myResponse.GetResponseStream(), Encoding.Default);
                strResult = reader.ReadToEnd();
            }
            catch (Exception ex)
            {
                strResult = ex.Message;
            }
            return strResult;
        }

        /// <summary>
        /// c#,.net 下载文件
        /// </summary>
        /// <param name="URL">下载文件地址</param>
        ///
        /// <param name="Filename">下载后的存放地址</param>
        /// <param name="Prog">用于显示的进度条</param>
        ///
        public static void DownloadFile(string URL, string filename, System.Windows.Forms.ProgressBar prog, System.Windows.Forms.Label label1,string description)
        {
            float percent = ;
            try
            {
                System.Net.HttpWebRequest Myrq = (System.Net.HttpWebRequest)System.Net.HttpWebRequest.Create(URL);
                System.Net.HttpWebResponse myrp = (System.Net.HttpWebResponse)Myrq.GetResponse();
                long totalBytes = myrp.ContentLength;
                if (prog != null)
                {
                    prog.Maximum = (int)totalBytes;
                }
                System.IO.Stream st = myrp.GetResponseStream();
                System.IO.Stream so = new System.IO.FileStream(filename, System.IO.FileMode.Create);
                long totalDownloadedByte = ;
                byte[] by = new byte[];
                int osize = st.Read(by, , (int)by.Length);
                while (osize > )
                {
                    totalDownloadedByte = osize + totalDownloadedByte;
                    System.Windows.Forms.Application.DoEvents();
                    so.Write(by, , osize);
                    if (prog != null)
                    {
                        prog.Value = (int)totalDownloadedByte;
                    }
                    osize = st.Read(by, , (int)by.Length);

                    percent = (float)totalDownloadedByte / (float)totalBytes * ;
                    label1.Text = description + "下载进度" + percent.ToString() + "%";
                    label1.Refresh();
                    System.Windows.Forms.Application.DoEvents(); //必须加注这句代码，否则label1将因为循环执行太快而来不及显示信息
                    System.Threading.Thread.Sleep();
                }
                so.Close();
                st.Close();
            }
            catch (System.Exception)
            {
                throw;
            }
        }

/// <summary>
/// 下载文件
/// </summary>
/// <param name="URL">下载文件地址</param>
/// <param name="Filename">下载后的存放地址</param>
//public static void DownloadFile(string URL, string filename)
//        {
//        DownloadFile(URL, filename, null,null);
//        }
    }
}

update.txt (JSON格式的文件，版本号，更新的文件等，网络和本地比对)

{
"Version":"",
"Server":"http://192.168.242.12:9001/",
"Description":"修正一些Bug",
"File":"Checkup.exe",
"UpdateTime":"2016-06-20 12:02:05",
"UpdateFiles":[
{"File":"xx.txt"},
{"File":"Checkup.exe"}
]
}

AutoUpdate.cs （界面、自动更新程序。需加入Newtonsoft.Json引用，网上下载直接加入引用就可以了）

using Newtonsoft.Json;
using Newtonsoft.Json.Linq;
using System;
using System.ComponentModel;
using System.Configuration;
using System.Diagnostics;
using System.Threading;
using System.Windows.Forms;

namespace AutoUpdate
{
    public partial class AutoUpdate : Form
    {
        private String UpdateServer ;
        SynchronizationContext _syncContext = null;
        public AutoUpdate()
        {
            InitializeComponent();
            _syncContext = SynchronizationContext.Current;
        }
        private void dowm() {
            _syncContext.Post(downFile,new object());
        }

        private void AutoUpdate_Load(object sender, EventArgs e)
        {

            UpdateServer = ConfigurationManager.AppSettings["UpdateServer"];
            int vs = isUpdate();
            if (vs == )
            {
                label1.Text = "正在下载更新文件，请稍候。。。";
                try
                {
                    new Thread(new ThreadStart(dowm)).Start();

                }
                catch (Exception ee)
                {
                    MessageBox.Show("下载异常：" + ee.Message);
                }
            }
            else if (vs > )
            {
                label1.Text = "正在下载更新文件，请稍候。。。";
                try
                {
                    new Thread(new ThreadStart(dowm)).Start();
                    //Thread.Sleep(500);
                    //downFile();
                }
                catch (Exception ee)
                {
                    MessageBox.Show("下载异常：" + ee.Message);
                }
            }
            else {
                Console.WriteLine("小于或等于0");
                this.Close();
                Process.Start("Checkup.exe");
            }
        }
        private int isUpdate()
        {
            //Version ApplicationVersion = new Version(Application.ProductVersion);
            //int version = ApplicationVersion.Major;
            string[] lines = System.IO.File.ReadAllLines("update.txt");
            String updateFile = "";
            foreach (string line in lines)
            {
                updateFile = updateFile+"\t" + line;
            }
            JObject updateJson =JObject.Parse(updateFile);
            int version = Int32.Parse(updateJson["Version"].ToString());
            JObject udJson;
            try
            {
                udJson = JObject.Parse(HttpHelper.Get_Http(UpdateServer));
            }
            catch (Exception ee) {
                Console.WriteLine(ee.Message);
                return -;
            }
            if (udJson != null)
            {
                int serverVersion = Int32.Parse(udJson["Version"].ToString());
                return serverVersion - version;
                //    if (serverVersion-version)
                //    {
                //        Console.WriteLine("版本号不一致");
                //        return true;
                //    }
                //    else {
                //        Console.WriteLine("版本一致");
                //        return false;
                //    }
            }
            else {
                return -;
            }
        }
        private void downFile1(object state) {
            JObject udJson = JObject.Parse(HttpHelper.Get_Http(UpdateServer));
            JArray ja = (JArray)JsonConvert.DeserializeObject(udJson["UpdateFiles"].ToString());
            HttpHelper.DownloadFile(udJson["Server"].ToString() + ja[ja.Count-]["File"].ToString(), ja[ja.Count - ]["File"].ToString(),progressBar1,label1, udJson["Description"].ToString());
            HttpHelper.DownloadFile(UpdateServer, "update.txt", progressBar1, label1, udJson["Description"].ToString());
            Start();
        }
        private void downFile(object state)
        {
            JObject udJson = JObject.Parse(HttpHelper.Get_Http(UpdateServer));
            JArray ja = (JArray)JsonConvert.DeserializeObject(udJson["UpdateFiles"].ToString());
            for (int i = ; i < ja.Count; i++)
            {
                HttpHelper.DownloadFile(udJson["Server"].ToString() + ja[i]["File"].ToString(), ja[i]["File"].ToString(), progressBar1, label1, udJson["Description"].ToString());
            }
            HttpHelper.DownloadFile(UpdateServer, "update.txt", progressBar1, label1, udJson["Description"].ToString());
            Start();
        }
        private void Start() {
            Process.Start("Checkup.exe");
            this.Hide();
            this.Close();
        }
    }
}

app.config（更新地址配置文件）

<?xml version="1.0" encoding="utf-8"?>
<configuration>
  <appSettings>
    <add key="UpdateServer" value="http://192.168.242.12:9001/update.txt"></add>
  </appSettings>
</configuration>

需在相应的web服务器下放入版本号大于本地文件的update.txt。还有需要更新的文件。以及修改update.txt中UpdateFiles.

至此大功搞成。
源代码：http://download.csdn.net/detail/zuxuguang/9567453