c# - Process.Kill() 似乎没有终止进程

Question

我在使用 Process.Kill() 时遇到问题。我想我一定是误解了它是如何工作的。这是我的测试功能。我启动了一个长时间运行的进程 (ping -t)，然后在五秒后将其终止。

我可以看到 ping 进程出现，但在我的程序完成后该进程仍然存在。我必须手动杀死它。

Console.WriteLine("Total number of ping processes is {0}", Process.GetProcessesByName("ping").Length);

ProcessStartInfo startInfo = new ProcessStartInfo("cmd.exe");
Process process = new Process();

startInfo.CreateNoWindow = true;
startInfo.UseShellExecute = false;
startInfo.Arguments = "/c ping -t 8.8.8.8";

Console.WriteLine("Staring ping process");
process.StartInfo = startInfo;
process.Start();
Thread.Sleep(5000);

Console.WriteLine("Total number of ping processes is {0}", Process.GetProcessesByName("ping").Length);
Thread.Sleep(5000);

Console.WriteLine("Killing ping process");
process.Kill();
Thread.Sleep(5000);

Console.WriteLine("Total number of ping processes is {0}", Process.GetProcessesByName("ping").Length);

我在这里做错了什么？

Answer 1

您启动了 cmd.exe，然后 cmd.exe 启动了子进程 ping.exe。要杀死 ping.exe，您可以杀死所有进程层次结构。例如使用 WMI(添加 System.Management 引用):

private static void KillProcessAndChildrens(int pid)
{
    ManagementObjectSearcher processSearcher = new ManagementObjectSearcher
      ("Select * From Win32_Process Where ParentProcessID=" + pid);
    ManagementObjectCollection processCollection = processSearcher.Get();

    try
    {
        Process proc = Process.GetProcessById(pid);
        if (!proc.HasExited) proc.Kill();
    }
    catch (ArgumentException)
    {
        // Process already exited.
    }

    if (processCollection != null)
    {
        foreach (ManagementObject mo in processCollection)
        {
            KillProcessAndChildrens(Convert.ToInt32(mo["ProcessID"])); //kill child processes(also kills childrens of childrens etc.)
        }
    }
}