Winform 下载服务器安装包并安装

代码中包含了检测本地安装盘符代码

 一，定义下载委托事件(用于实现前台进度条更新和下载完成后事件的回调)：
 private delegate void Action();
 private string diverUrl = ConfigurationManager.AppSettings["diverUrl"];//http:形式
 //页面初次加载事件
 private void frmProgressBar_Load(object sender, EventArgs e)
         {
             //获取存储路径
             GetRemovableDeviceId();
             if (File.Exists(_drivesName))
             {
                 //安装包存在，则直接进行安装
                 var process = Process.Start(_drivesName);
                 if (process != null) process.WaitForExit();
                 //Process
                 this.Close();
             }
             else
             {
                 //安装包不存在--则下载
                 DownloadFile(diverUrl, _drivesName,DownloadProgressChanged, downloadFileCompleted);
             }
         }

         /// 下载
         private void downloadFileCompleted()
         {
             Process.Start(_drivesName);
             this.Close();
         }

         /// 检测本机盘符
         public void GetRemovableDeviceId()
         {
             List<string> drivesList = new List<string>();
             DriveInfo[] dr = DriveInfo.GetDrives();
             foreach (DriveInfo dd in dr)
             {
                 if (dd.DriveType == DriveType.CDRom || dd.DriveType == DriveType.Removable)  //过滤掉是光驱的 磁盘或移动U盘
                 {
                     break;
                 }
                 else
                 {
                     drivesList.Add(dd.Name);
                 }
             }
             //已驱除驱动盘
             for (int i = ; i < drivesList.Count; i++)
             {
                 //其它盘符
                 if (drivesList[i].IndexOf("C") == -)
                 {
                     _drivesName = drivesList[drivesList.Count - ].Replace(":\\", "")+ ":Cam_Ocx.exe";
                     return;
                 }
                 else
                 {
                     _drivesName = drivesList[i].Replace(":\\","") + ":Cam_Ocx.exe";
                 }
             }
         }
 //下载文件
  private void DownloadFile(string url, string savefile, Action<int> downloadProgressChanged, Action downloadFileCompleted)
         {
             WebClient client = new WebClient();
             if (downloadProgressChanged != null)
             {
                 client.DownloadProgressChanged += delegate (object sender, DownloadProgressChangedEventArgs e)
                 {
                     this.Invoke(downloadProgressChanged, e.ProgressPercentage);
                 };
             }
             if (downloadFileCompleted != null)
             {
                 client.DownloadFileCompleted += delegate (object sender, AsyncCompletedEventArgs e)
                 {
                     this.Invoke(downloadFileCompleted);
                 };
             }
             client.DownloadFileAsync(new Uri(url), savefile);
         }
 //显示进度条
  private void DownloadProgressChanged(int val)
         {
             progressBar1.Value = val;
             lbValue.Text = val + "%";
         }