学步园

      一。重新启动指定可执行程序。(如果程序已运行，则先中止，再运行。如果未运行，则运行它)
             private void RestartApplication(string exeFileName)
        {
            if (string.IsNullOrEmpty(exeFileName) ||
                !System.IO.File.Exists(exeFileName)) { return; }

            //中止正在运行的进程。
            Process[] processes = Process.GetProcessesByName(System.IO.Path.GetFileNameWithoutExtension(exeFileName));
            if ((processes != null) && (processes.Length > 0))
            {
                processes[0].Kill();
            }

            //启动新进程
            Process newProcess = new Process();
            newProcess.StartInfo.FileName = exeFileName;
            newProcess.Start();
        }

二。在.net 开发RichClient应用程序中，有时要调用另外一个应用程序，并且在被调用的程序结束后，希望返回执行结果的状态。
下面的代码用appDomain 和 Process 两种技术实现这种应用:

1.用process调用一个应用程序
1.1 用ExitCode

appExePath: 应用程序
ProcessStartInfo p = new ProcessStartInfo (AppExePath);
p.WorkingDirectory = Path.GetDirectoryName(AppExePath);
//如果有参数就写在Arguments
p.Arguments = CommandLineString;
AppProcess = Process.Start (p);
//如果希望程序结束后返回结束状态
AppProcess.WaitForExit();
if (AppProcess.ExitCode == 2)
{
  restartApp = true;
  AppProcess = null;
  StartApp_Process(true);
}
else
  restartApp = false;
//AppProcess.ExitCode 返回一个int值。 被调用的程序在退出的时候可以设置Environment.ExitCode返回这个值，默认=0
//根据应用程序返回的值，可以做不同的处理。

1.2用StandardOutput标准输出

调用程序：

 public static void runDBDools(string[] args)
        {

 Process process = new Process();
            process.StartInfo.FileName = fileName;
            process.StartInfo.WindowStyle = ProcessWindowStyle.Normal;
            process.StartInfo.Arguments = string.Format("{0} {1} {2} {3} {4} {5}", args[0], args[1], args[2], DBToolsID, args[3], args[4]);

            try
            {
                process.OutputDataReceived += new DataReceivedEventHandler(process_OutputDataReceived);
               
                             
                process.StartInfo.UseShellExecute = false;
                process.StartInfo.RedirectStandardInput = true;
                process.StartInfo.RedirectStandardOutput = true;

                Application.OpenForms[0].Enabled = false;
                isCall = false;
                process.Start();
                process.BeginOutputReadLine();//开始异步读取

                while (!process.HasExited)
                {
                    process.WaitForExit(100);
                    Application.DoEvents();
                }

            }
            catch (Exception ex)
            {
                MessageBoxHelper.ShowError(ex.Message);
            }
            finally
            {
                Application.OpenForms[0].Enabled = true;
                Application.DoEvents();
                Application.OpenForms[0].Activate();
                process.Close();//关闭进程
                process.Dispose();//释放资源

            }

}

  static void process_OutputDataReceived(object sender, DataReceivedEventArgs e)
        {
            if (isCall) return;
            try
            {
                Control.CheckForIllegalCrossThreadCalls = false;   
                if (e == null) return;
                if (e.Data == null) return;
                if (e.Data.Trim() == "RestoreOK")
                {
                    Global.CloseAsk = false;
                    Global.NeedRelogin = true;
                   Application.OpenForms[0]. Close();

                   //Process process = new Process();
                   //process.StartInfo.FileName = Application.StartupPath + @"/" + "Main.exe";
                   //process.Start();
                   //isCall = true;
                }
            }
            catch(Exception ex)
            { MessageBoxHelper.ShowError(ex.Message ); }
        }

被调用程序：

   Console.Write("RestoreOK");
   this.Close();

2. 用AppDomain实现上述功能
AppDomain NewDomain = AppDomain.CreateDomain (
     "New App Domain",
     AppDomain.CurrentDomain.Evidence,
     Path.GetDirectoryName(AppExePath)+@"/",
     "",
     false);

//Execute the app in the new appdomain
string[] cmdLineArgs;
cmdLineArgs = CommandLineArgs;  
retValue = NewDomain.ExecuteAssembly(AppExePath,AppDomain.CurrentDomain.Evidence,cmdLineArgs);
//Unload the app domain
appDomain.Unload(NewDomain);
if (returnCode == 2)
{
restartApp = true;
}
else
restartApp = false; 
这里retValue和应用Process返回的ExitCode一样，都是调用的程序在退出的时候的Environment.ExitCode值。

http://www.cnblogs.com/zhouto/articles/175186.html