c# 软件自动在线更新代码（二）

        /// <summary>         /// 获取文件列表并下载         /// </summary>         private static void UpdateList()         {             string xmlPath = dirPath + "AutoUpdater/AutoUpdater.xml";             WebClient wc = new WebClient();             DataSet ds = new DataSet();             ds.Locale = CultureInfo.InvariantCulture;                          try             {                 Stream sm = wc.OpenRead(xmlPath);                 ds.ReadXml(sm);                 DataTable dt = ds.Tables["UpdateFileList"];                 StringBuilder sb = new StringBuilder();                 count = dt.Rows.Count;                 for (int i = 0; i < dt.Rows.Count; i++)                 {                     if (i == 0)                     {                         sb.Append(dt.Rows[i]["UpdateFile"].ToString());                     }                     else                     {                         sb.Append("," + dt.Rows[i]["UpdateFile"].ToString());                     }                 }                 fileNames = sb.ToString().Split(',');                 sm.Close();             }             catch (WebException ex)             {                 MeBox(ex.Message);             }         }        /// <summary>         /// 下载文件         /// </summary>         /// <param name="arry">下载序号</param>         private void DownloadFile(int arry)         {             try             {                 num++;                 fileName = fileNames[arry];                 this.label1.Text = String.Format(                     CultureInfo.InvariantCulture,                     "更新进度 {0}/{1} [ {2} ]",                     num,                     count,                     ConvertSize(size));                this.progressBar2.Value = 0;                 this.downWebClient.DownloadFileAsync(                     new Uri(dirPath + "AutoUpdater/" + fileName),                     Application.StartupPath + "\\AutoUpdater\\" + fileName);             }             catch (WebException ex)             {                 MeBox(ex.Message);             }         }        /// <summary>         /// 转换字节大小         /// </summary>         /// <param name="byteSize">输入字节数</param>         /// <returns>返回值</returns>         private static string ConvertSize(long byteSize)         {             string str = "";             float tempf = (float)byteSize;             if (tempf / 1024 > 1)             {                 if ((tempf / 1024) / 1024 > 1)                 {                     str = ((tempf / 1024) / 1024).ToString("##0.00", CultureInfo.InvariantCulture) + "MB";                 }                 else                 {                     str = (tempf / 1024).ToString("##0.00", CultureInfo.InvariantCulture) + "KB";                 }             }             else             {                 str = tempf.ToString(CultureInfo.InvariantCulture) + "B";             }             return str;         }        /// <summary>         /// 弹出提示框         /// </summary>         /// <param name="txt">输入提示信息</param>         private static void MeBox(string txt)         {             MessageBox.Show(                 txt,                 "提示信息",                 MessageBoxButtons.OK,                 MessageBoxIcon.Asterisk,                 MessageBoxDefaultButton.Button1,                 MessageBoxOptions.DefaultDesktopOnly);         }        /// <summary>         /// 关闭程序         /// </summary>         private static void UpdaterClose()         {             try             {                 System.Diagnostics.Process.Start(Application.StartupPath + "\\ComCir.exe");             }             catch (Win32Exception ex)             {                 MeBox(ex.Message);             }             Application.Exit();         }        /// <summary>         /// 读取.exe.config的值         /// </summary>         /// <param name="path">.exe.config文件的路径</param>         /// <param name="appKey">"key"的值</param>         /// <returns>返回"value"的值</returns>         internal static string GetConfigValue(string path, string appKey)         {             XmlDocument xDoc = new XmlDocument();             XmlNode xNode;             XmlElement xElem = null;             try             {                 xDoc.Load(path);                xNode = xDoc.SelectSingleNode("//appSettings");                xElem = (XmlElement)xNode.SelectSingleNode("//add[@key=\"" + appKey + "\"]");                              }             catch (XmlException ex)             {                 MeBox(ex.Message);             }             if (xElem != null)                     return xElem.GetAttribute("value");                 else                     return "";         }        /// <summary>         /// 设置.exe.config的值         /// </summary>         /// <param name="path">.exe.config文件的路径</param>         /// <param name="appKey">"key"的值</param>         /// <param name="appValue">"value"的值</param>         internal static void SetConfigValue(string path, string appKey, string appValue)         {             XmlDocument xDoc = new XmlDocument();             try             {                 xDoc.Load(path);                XmlNode xNode;                 XmlElement xElem1;                 XmlElement xElem2;                xNode = xDoc.SelectSingleNode("//appSettings");                xElem1 = (XmlElement)xNode.SelectSingleNode("//add[@key=\"" + appKey + "\"]");                 if (xElem1 != null) xElem1.SetAttribute("value", appValue);                 else                 {                     xElem2 = xDoc.CreateElement("add");                     xElem2.SetAttribute("key", appKey);                     xElem2.SetAttribute("value", appValue);                     xNode.AppendChild(xElem2);                 }                 xDoc.Save(Application.StartupPath + "\\" + path);             }             catch (XmlException ex)             {                 MeBox(ex.Message);             }         }        /// <summary>         /// 判断软件的更新日期         /// </summary>         /// <param name="Dir">服务器地址</param>         /// <returns>返回日期</returns>         private static string GetTheLastUpdateTime(string Dir)         {             string LastUpdateTime = "";             string AutoUpdaterFileName = Dir + "AutoUpdater/AutoUpdater.xml";             try             {                 WebClient wc = new WebClient();                 Stream sm = wc.OpenRead(AutoUpdaterFileName);                 XmlTextReader xml = new XmlTextReader(sm);                 while (xml.Read())                 {                     if (xml.Name == "UpdateTime")                     {                         LastUpdateTime = xml.GetAttribute("Date");                         break;                     }                 }                 xml.Close();                 sm.Close();             }             catch (WebException ex)             {                 MeBox(ex.Message);             }             return LastUpdateTime;         }     } }

//更新程序 if(this._Update) { //关闭原有的应用程序 this.labDownFile.Text = "正在关闭程序...."; System.Diagnostics.Process[]proc=System.Diagnostics.Process.GetProcessesByName("TIMS"); //关闭原有应用程序的所有进程 foreach(System.Diagnostics.Process pro in proc) { pro.Kill(); } DirectoryInfo theFolder=new DirectoryInfo(Path.GetTempPath()+＂JurassicUpdate");if(theFolder.Exists){ foreach(FileInfo theFile in theFolder.GetFiles()) { //如果临时文件夹下存在与应用程序所在目录下的文件同名的文件，则删除应用程序目录下的文件 if(File.Exists(Application.StartupPath + \\"+Path.GetFileName(theFile.FullName))) File.Delete(Application.StartupPath + "\\"+Path.GetFileName(theFile.FullName)); //将临时文件夹的文件移到应用程序所在的目录下 File.Move(theFile.FullName,Application.StartupPath + \\"+Path.GetFileName(theFile.FullName)); } } //启动安装程序 this.labDownFile.Text = "正在启动程序...."; System.Diagnostics.Process.Start(Application.StartupPath + "\\" + "TIMS.exe"); this.Close(); } }

 　这段程序是实现在线升级的关键代码，步骤有点复杂：首先用Invoke方法同步调用状态改变进程，然后调用动态链接库中批量下载 (BatchDownloader.cs)类启动批量下载，接着判断原有的主应用程序有没有关闭，如果没关闭,则用Process.Kill()来关闭主 程序。接下来，判断临时文件夹下(即下载升级程序所在的目录)是否存在与应用程序所在目录下的文件同名的文件，如果存在同名文件,则删除应用程序目录下的 文件，然后将临时文件夹的文件移到应用程序所在的目录下。最后重新启动主应用程序。这样更新就完成了。