C#程序版本更新教程之C#實現winform版本升級

我們做了程序，不免會有版本升級，這就需要程序有自動版本升級的功能。

那麼看看我是如何實現程序自動更新的。

直接上代碼：

 Code [http://www.xueit.com]
using System;
using System.Collections.Generic;
using System.Text;
using System.Reflection;
using System.IO;
using System.Net;
using System.Xml;

namespace Update
{
    /// <summary>
    /// 更新完成觸發的事件
    /// </summary>
    public delegate void UpdateState();
    /// <summary>
    /// 程序更新
    /// </summary>
    public class SoftUpdate
    {

        private string download;
        private const string updateUrl = "http://www.csdn.net/update.xml";//升級配置的XML文件地址

        #region 構造函數
        public SoftUpdate() { }

        /// <summary>
        /// 程序更新
        /// </summary>
        /// <param name="file">要更新的文件</param>
        public SoftUpdate(string file,string softName) {
            this.LoadFile = file;
            this.SoftName = softName;
        }
        #endregion

        #region 屬性
        private string loadFile;
        private string newVerson;
        private string softName;
        private bool isUpdate;

        /// <summary>
        /// 或取是否需要更新
        /// </summary>
        public bool IsUpdate
        {
            get
            {
                checkUpdate();
                return isUpdate;
            }
        }

        /// <summary>
        /// 要檢查更新的文件
        /// </summary>
        public string LoadFile
        {
            get { return loadFile; }
            set { loadFile = value; }
        }

        /// <summary>
        /// 程序集新版本
        /// </summary>
        public string NewVerson
        {
            get { return newVerson; }
        }

        /// <summary>
        /// 升級的名稱
        /// </summary>
        public string SoftName
        {
            get { return softName; }
            set { softName = value; }
        }

        #endregion

        /// <summary>
        /// 更新完成時觸發的事件
        /// </summary>
        public event UpdateState UpdateFinish;
        private void isFinish() {
            if(UpdateFinish != null)
                UpdateFinish();
        }

        /// <summary>
        /// 下載更新
        /// </summary>
        public void Update()
        {
            try
            {
                if (!isUpdate)
                    return;
                WebClient wc = new WebClient();
                string filename = "";
                string exten = download.Substring(download.LastIndexOf("."));
                if (loadFile.IndexOf(@"/") == -1)
                    filename = "Update_"   Path.GetFileNameWithoutExtension(loadFile)   exten;
                else
                    filename = Path.GetDirectoryName(loadFile)   "//Update_"   Path.GetFileNameWithoutExtension(loadFile)   exten;
                wc.DownloadFile(download, filename);
                wc.Dispose();
                isFinish();
            }
            catch
            {
                throw new Exception("更新出現錯誤，網絡連接失敗！");
            }
        }

        /// <summary>
        /// 檢查是否需要更新
        /// </summary>
        public void checkUpdate()
        {
            try {
                WebClient wc = new WebClient();
                Stream stream = wc.OpenRead(updateUrl);
                XmlDocument xmlDoc = new XmlDocument();
                xmlDoc.Load(stream);
                XmlNode list = xmlDoc.SelectSingleNode("Update");
                foreach(XmlNode node in list) {
                    if(node.Name == "Soft" && node.Attributes["Name"].Value.ToLower() == SoftName.ToLower()) {
                        foreach(XmlNode xml in node) {
                            if(xml.Name == "Verson")
                                newVerson = xml.InnerText;
                            else
                                download = xml.InnerText;
                        }
                    }
                }

                Version ver = new Version(newVerson);
                Version verson = Assembly.LoadFrom(loadFile).GetName().Version;
                int tm = verson.CompareTo(ver);

                if(tm >= 0)
                    isUpdate = false;
                else
                    isUpdate = true;
            }
            catch(Exception ex) {
                              throw new Exception("更新出現錯誤，請確認網絡連接無誤後重試！");
            }
        }

        /// <summary>
        /// 獲取要更新的文件
        /// </summary>
        /// <returns></returns>
        public override string ToString()
        {
            return this.loadFile;
        }
    }
}

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