Process.Start正在阻止

Question

我正在调用Process.Start,但它会阻止当前线程.

pInfo = new ProcessStartInfo("C:\\Windows\\notepad.exe");

// Start process
mProcess = new Process();
mProcess.StartInfo = pInfo;
if (mProcess.Start() == false) {
    Trace.TraceError("Unable to run process {0}.");
}

即使进程关闭,代码也不再响应.

但是Process.Start真的应该阻止吗？这是怎么回事？

(流程正确启动)

---

using System;
using System.Diagnostics;
using System.Threading;
using System.Windows.Forms;

namespace Test
{
    class Test
    {
        [STAThread]
        public static void Main()
        {
            Thread ServerThread = new Thread(AccepterThread);
            ServerThread.Start();

            Console.WriteLine (" ---  Press ENTER to stop service ---");
            while (Console.Read() < 0) { Application.DoEvents(); }

            Console.WriteLine("Done.");
        }

        public static void AccepterThread(object data)
        {
            bool accepted = false;

            while (true) {
                if (accepted == false) {
                    Thread hThread = new Thread(HandlerThread);
                    accepted = true;
                    hThread.Start();
                } else
                    Thread.Sleep(100);
            }
        }

        public static void HandlerThread(object data)
        {
            ProcessStartInfo pInfo = new ProcessStartInfo("C:\\Windows\\notepad.exe");

            Console.WriteLine("Starting process.");

            // Start process
            Process mProcess = new Process();
            mProcess.StartInfo = pInfo;
            if (mProcess.Start() == false) {
                Console.WriteLine("Unable to run process.");
            }
            Console.WriteLine("Still living...");
        }
    }
}

控制台输出是:

---按ENTER键停止服务---启动过程.

---

找到了:

[STAThread]

使Process.Start阻塞.我读过STAThread和多线程,但我无法将这些概念与Process.Start行为联系起来.

Windows.Form 需要 AFAIK,STAThread .如何在使用Windows.Form时解决此问题？

---

地狱新闻:

如果我重建我的应用程序,第一次正确运行应用程序工作,但如果我停止调试并重新启动iy,问题就出现了问题.

在没有调试器的情况下执行应用程序时,不会引发此问题.

Answer 1

不,Process.Start不等待子进程完成...否则您将无法使用重定向I/O等功能.

示例控制台应用:

using System;
using System.Diagnostics;

public class Test
{
    static void Main()
    {
        Process p = new Process { 
            StartInfo = new ProcessStartInfo("C:\\Windows\\notepad.exe")
        };
        p.Start();
        Console.WriteLine("See, I'm still running");
    }
}

这打印"看,我还在跑",我的盒子上没有任何问题 - 它在盒子上做了什么？

Answer 2

创建ProcessStartInfo并将UseShellExecute设置为false(默认值为true).您的代码应为:

pInfo = new ProcessStartInfo("C:\\Windows\\notepad.exe");
pInfo.UseShellExecute = false;

// Start process
mProcess = new Process();
mProcess.StartInfo = pInfo;
if (mProcess.Start() == false) {
    Trace.TraceError("Unable to run process {0}.");
}

我有同样的问题,并启动可执行文件直接从可执行文件创建过程解决了问题.