C# Winform自动更新程序实例详解

private bool CheckUpdate()
  {
   bool result = false;
   try
   {
    string Cfg = TxtRead(exePath "\\Config.txt");
    ConfigLocal = JsonConvert.DeserializeObject<DTO_Config>(Cfg);
 
    CheckUpdateURL = ConfigLocal.AutoUpdateURL;
 
    Cfg = TxtRead(CheckUpdateURL "\\Config.txt");
    ConfigRemote = JsonConvert.DeserializeObject<DTO_Config>(Cfg);    
 
    VersionR = ConfigRemote.Version;
    VersionL = ConfigLocal.Version;
    int VersionRemote = int.Parse(ConfigRemote.Version.Replace(".", ""));
    int VersionLocal = int.Parse(ConfigLocal.Version.Replace(".", ""));
 
    result = VersionRemote > VersionLocal;
   }
   catch { }
   return result;
  }

public void DownLoadFile()
  {
   if (!Directory.Exists(UpdateFiles))
   {
    Directory.CreateDirectory(UpdateFiles);
   }
   using (WebClient webClient = new WebClient())
   {
    try
    {
     webClient.DownloadFileCompleted = new AsyncCompletedEventHandler(client_DownloadFileCompleted);
     webClient.DownloadProgressChanged = new DownloadProgressChangedEventHandler(client_DownloadProgressChanged);
     webClient.DownloadFileAsync(new Uri(CheckUpdateURL "\\UpdateFile.rar"), UpdateFiles "\\UpdateFile.rar");
    }
    catch (WebException ex)
    {
     MessageBox.Show(ex.Message, "系统提示", MessageBoxButtons.OK, MessageBoxIcon.Error);
    }
   }
  }

private void client_DownloadProgressChanged(object sender, DownloadProgressChangedEventArgs e)
  {
   this.progressBarUpdate.Minimum = 0;
   this.progressBarUpdate.Maximum = (int)e.TotalBytesToReceive;
   this.progressBarUpdate.Value = (int)e.BytesReceived;
   this.lblPercent.Text = e.ProgressPercentage "%";
  }

private void client_DownloadFileCompleted(object sender, AsyncCompletedEventArgs e)
  {
   if (e.Error != null)
   {
    MessageBox.Show(e.Error.Message, "系统提示", MessageBoxButtons.OK, MessageBoxIcon.Error);
   }
   else
   {
    this.lblMessage.Text = "下载完成";
    //复制更新文件替换旧文件
    DirectoryInfo TheFolder = new DirectoryInfo(UpdateFiles);
    foreach (FileInfo NextFile in TheFolder.GetFiles())
    {
     File.Copy(NextFile.FullName, Application.StartupPath NextFile.Name, true);
    }
    
   }
  }

public void GetRemoteFile()
  {
   try
   {
    DirectoryInfo TheFolder = new DirectoryInfo(CheckUpdateURL);
    FileInfo[] FileList = TheFolder.GetFiles();
    this.progressBarUpdate.Minimum = 0;
    this.progressBarUpdate.Maximum = FileList.Length;
 
    foreach (FileInfo NextFile in FileList)
    {
     if (NextFile.Name != "Config.txt")
     {
      File.Copy(NextFile.FullName, exePath "\\" NextFile.Name, true);      
     }
     this.lblMessage.Text = "更新" NextFile.Name;
     this.progressBarUpdate.Value = 1;
     this.lblPercent.Text = "更新进度... " (this.progressBarUpdate.Value / FileList.Length) * 100 "%";
    }
    this.lblMessage.Text = "更新完成";
    //更改本地版本号为最新版本号
    ConfigLocal.Version = VersionR;
    string cfgs = JsonConvert.SerializeObject(ConfigLocal);
    TxtWrite(Application.StartupPath "\\Config.txt", cfgs);
   }
   catch (Exception ex)
   {
    MessageBox.Show(ex.Message, "系统提示", MessageBoxButtons.OK, MessageBoxIcon.Error);
   }
  }