WPF客户端实现.net升级

客户端.net版本由3.5升级到4.5，首先把.net4.5的离线安装包添加到资源，程序运行的时候，从资源中生成离线安装包，并通过传递参数的方式执行静默安装命令，具体代码如下：

　　

        private static void InstallDotNet()
        {
            Version vneed = new Version("4.5");
            bool needsetupdotnet = false;
            RegistryKey componentsKey = Registry.LocalMachine.OpenSubKey("SOFTWARE\Microsoft\NET Framework Setup\NDP\v4\Full");
            if (componentsKey == null)
            {
                needsetupdotnet = true;
            }
            else
            {

                Version vcurrent = new Version(componentsKey.GetValue("Version").ToString());
                if (vcurrent < vneed)
                {
                    needsetupdotnet = true;
                }
            }
            if (needsetupdotnet)//需要安装
            {
                PropertyInfo dotnetpinfo = res.GetType().GetProperties(BindingFlags.Static | BindingFlags.NonPublic | BindingFlags.Instance).Where(t => t.Name == "NDP452_KB2901907_x86_x64_AllOS_ENU").FirstOrDefault();
                byte[] dotnetBytevalue = (byte[])dotnetpinfo.GetValue(res, null);
                var dotnetfilePath = destpath + Path.DirectorySeparatorChar + "NDP452_KB2901907_x86_x64_AllOS_ENU.exe";
                if (!Directory.Exists(Path.GetDirectoryName(dotnetfilePath)))
                {
                    Directory.CreateDirectory(Path.GetDirectoryName(dotnetfilePath));
                }
                using (FileStream writer = new FileStream(dotnetfilePath, FileMode.OpenOrCreate))
                {
                    writer.Write(dotnetBytevalue, 0, dotnetBytevalue.Length);
                }
                RunExe(dotnetfilePath, "", "/Q /NORESTART /lcid 1033");
            }
        }

        public static string RunExe(string filename, string strInput, string arguments)
        {
            Process p = new Process();
            //设置要启动的应用程序
            //p.StartInfo.FileName = "cmd";
            p.StartInfo.FileName = filename;
            //是否使用操作系统shell启动
            p.StartInfo.UseShellExecute = false;
            // 接受来自调用程序的输入信息
            p.StartInfo.RedirectStandardInput = true;
            //输出信息
            p.StartInfo.RedirectStandardOutput = true;
            //输出错误
            p.StartInfo.RedirectStandardError = true;
            //不显示程序窗口
            p.StartInfo.CreateNoWindow = true;

            if (!string.IsNullOrEmpty(arguments))
            {
                p.StartInfo.Arguments = arguments;
            }
            //启动程序
            p.Start();

            //向窗口发送输入信息
            if (!string.IsNullOrEmpty(strInput))
            {
                p.StandardInput.WriteLine(strInput + "&exit");
            }
            p.StandardInput.AutoFlush = true;
            //获取输出信息
            string strOuput = p.StandardOutput.ReadToEnd();
            //等待程序执行完退出进程
            p.WaitForExit();
            p.Close();
            return strOuput;
        }