这一篇就着重写一下客户端的代码，客户端主要实现的有：启动后检测本地的xml文件，然后发送到服务器获取需要更新的文件以及版本列表。循环下载。下载成功后，备份原始文件->复制到主目录（若失败进行回滚）->修改本地xml文件，更新完成后打开主程序。
开发环境：.NET Core 3.1
开发工具： Visual Studio 2019
实现代码：
private void CopyRun() {
string runPath = Process.GetCurrentProcess().MainModule.FileName; string runName = Path.GetFileName(runPath);
if(!runName.StartsWith("_")) { string copyPath = runPath.Replace(runName, "_" + runName); byte[] bytes; using(FileStream fileStream = new FileStream(runPath, FileMode.Open, FileAccess.Read)) { bytes = new byte[fileStream.Length]; fileStream.Read(bytes, 0, bytes.Length); } using(FileStream fileStream = new FileStream(copyPath, FileMode.create, FileAccess.Write)) { fileStream.Write(bytes); }
ProcessStartInfo info = new ProcessStartInfo(copyPath, _runApp); Process.Start(info); Environment.Exit(0); }
}
private void updateUI(Action actoin) { if(this.InvokeRequired) { this.BeginInvoke(actoin); } else { actoin(); } }
private string GetupdateUrl() { XElement xele = XElement.Load(updateXml); string url = xele.Element("url").Value; return url; }
private string GetupdateFiles() { XDocument xdoc = XDocument.Load(updateXml); var files = from f in xdoc.Root.Element("files").Elements() select new { name = f.Attribute("name").Value, version = f.Attribute("version").Value }; return JsonConvert.SerializeObject(files); }
private void updateXml(List<updateModel> list) { XDocument xdoc = XDocument.Load(updateXml); foreach(var model in list) { var ele_files = xdoc.Root.Element("files");
XElement xele = ele_files.Elements().FirstOrDefault(s => s.Attribute("name").Value == model.name); if(xele != null) { xele.SetAttributeValue("version", model.version); } else { XElement addXele = new XElement("file"); addXele.SetAttributeValue("name", model.name); addXele.SetAttributeValue("version", model.version); ele_files.Add(addXele); } } xdoc.Save(updateXml); }
readonly string _runApp; public Form_update(string runApp) { InitializeComponent(); _runApp = runApp; } readonly string updateXml = Application.StartupPath + "updateList.xml"; private void btn_update_Click(object sender, EventArgs e) { #region 设置ui btn_update.Enabled = false; label_status.Text = "正在更新"; #endregion
#region 初始化路径 string savePath = Application.StartupPath + "temp_update\\"; string backPath = Application.StartupPath + "temp_back\\"; if(Directory.Exists(savePath)) { Directory.delete(savePath, true); } Directory.createDirectory(savePath);
if(Directory.Exists(backPath)) { Directory.delete(backPath, true); } Directory.createDirectory(backPath);
#endregion
#region 图标旋转 int angle = 0; Image img = pictureBox1.BackgroundImage;
System.Threading.Timer timer = new System.Threading.Timer(s => { updateUI(() => { angle = angle == 360 ? 0 : angle + 10; pictureBox1.BackgroundImage = img.RotateImage(angle); }); }, null, 0, 100); #endregion
#region 下载更新 string url = GetupdateUrl(); bool isSuccess = false; Task.Run(() => { try { HttpResult httpResult = HttpUtil.HttpRequest(new HttpItem(url + "GetupdateFiles", requestData: GetupdateFiles())); if(httpResult.Status) { updateModel_Out output = JsonConvert.DeserializeObject<updateModel_Out>(httpResult.HttpStringData);
if(output.updateList.Count == 0) { throw new Exception("当前已是最新版本"); }
updateUI(() => { progressBar1.Maximum = output.updateList.Count + 1; }); for(int i = 0; i < output.updateList.Count; i++) {
updateModel updateModel = output.updateList[i]; #region 进度条 updateUI(() => { label_status.Text = $"正在更新第 {i + 1}/{output.updateList.Count} 个文件,文件名：{updateModel.name}"; progressBar1.Value = i + 1; }); #endregion
#region 下载文件 httpResult = HttpUtil.HttpRequest(new HttpItem(url + "DownloadFile", requestData: JsonConvert.SerializeObject(updateModel))); if(httpResult.Status) { using(FileStream fileStream = new FileStream(savePath + updateModel.name, FileMode.create)) { fileStream.Write(httpResult.HttpByteData, 0, httpResult.HttpByteData.Length); } } else { throw new Exception(updateModel.name + "下载失败,请重试"); } #endregion
Task.Delay(1000).Wait(); }
#region 备份 updateUI(() => { label_status.Text = "正在备份"; }); try { File.Copy(updateXml, backPath + "updateList.xml"); foreach(var file in output.updateList) { if(File.Exists(Application.StartupPath + file.name)) { File.Copy(Application.StartupPath + file.name, backPath + file.name, true); } } } catch { } #endregion
#region 完成更新 updateUI(() => { label_status.Text = "正在完成更新"; progressBar1.Value = progressBar1.Maximum; }); string[] files = Directory.GetFiles(savePath); try { #region 更新成功 foreach(string file in files) { File.Copy(file, Application.StartupPath + Path.GetFileName(file), true); } Directory.delete(savePath, true); #region 保存最新版本 updateXml(output.updateList); isSuccess = true; updateUI(() => { label_status.Text = "更新完成"; }); #endregion #endregion } catch { #region 失败回滚 updateUI(() => { label_status.Text = "更新失败，正在回滚"; }); string[] files_back = Directory.GetFiles(backPath); foreach(string file in files_back) { File.Copy(file, Application.StartupPath + Path.GetFileName(file), true); } File.Copy(backPath + "updateList.xml", updateXml, true); updateUI(() => { label_status.Text = "回滚完成"; }); return; #endregion } #endregion } else { throw new Exception("获取更新列表失败"); } } catch(Exception ex) { updateUI(() => { label_status.Text = "更新失败！" + ex.Message; btn_update.Enabled = true; }); } finally { updateUI(() => { timer.Change(-1, -1); pictureBox1.BackgroundImage = img; if(isSuccess) { if(File.Exists(_runApp)) { if(MessageBox.Show("更新完成,是否打开程序", "提示", MessageBoxButtons.YesNo, MessageBoxIcon.Question) == DialogResult.Yes) { Process.Start(_runApp); } Environment.Exit(0); } } }); } }); #endregion
}
private void btn_close_Click(object sender, EventArgs e) { Close(); }
private void panel1_Paint(object sender, PaintEventArgs e) { Pen pen = new Pen(Color.LightGray); e.Graphics.DrawLine(pen, new Point(36, 36), new Point(panel1.Width - 36, 36)); }
实现效果：
代码解析：主要注释已经在代码中标注了，由于基本都是在线程中进行操作的，所以在更新UI的时候封装了updateUI方法，然后就是加了一个定时器实现图标的旋转。关于CopyRun（更新自己）方法，就是用来更新自动更新程序本身的，即运行之前复制一份本身，然后启动复制的程序，否则本身正在运行的时候是不能更新自己的。
该文章在 2023/2/27 10:17:27 编辑过
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