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, , 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;
         }