1

我添加了一行代码让线程休眠 3 秒。

如果我取消注释突出显示的两行代码中的任何一个，我会得到一个错误 - 我知道它与添加睡眠有关 - 但为什么呢？

我假设myProcess它本身就是一个线程 - 是这个线程在睡觉吗？
我需要更改什么以使 IE 保持打开 3 秒然后关闭？

class MyProcess {


    public static void Main() {

        Process myProcess = new Process();
        ProcessStartInfo ps = new ProcessStartInfo();

        try {

            ps.FileName = @"IExplore.exe";
            ps.WindowStyle = ProcessWindowStyle.Normal;
            myProcess.StartInfo = ps;
            myProcess.Start();

        } catch(Exception e) {
            Console.WriteLine(e.Message);
        }

        Thread.Sleep(3000);

        //>>>>>>>>following throw an error
        //myProcess.Kill();
        //myProcess.CloseMainWindow();
        //>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>

        Console.WriteLine("press [enter] to exit");
        Console.Read();
    }
}

这是我收到的错误

无法处理请求，因为进程已退出

在此处输入图像描述

4

1 回答 1

3

InvalidOperationException如果操作无法完成，您将收到一条消息。在您的代码中，您可能会在调用orInvalidOperationException之前收到进程是否已退出的信息。myProcess.Kill();myProcess.CloseMainWindow();

当一个进程已经退出时，你不能杀死它。要解决此问题，请避免在线程空闲时关闭进程。您可以在执行命令之前捕获异常或检查进程是否已退出。

例子

class MyProcess
{
    public static void Main()
    {

        Process myProcess = new Process(); //Initialize a new Process of name myProcess
        ProcessStartInfo ps = new ProcessStartInfo(); //Initialize a new ProcessStartInfo of name ps

        try
        {
            ps.FileName = @"IExplore.exe"; //Set the target file name to IExplore.exe
            ps.WindowStyle = ProcessWindowStyle.Normal; //Set the window state when the process is started to Normal
            myProcess.StartInfo = ps; //Associate the properties to pass to myProcess.Start() from ps
            myProcess.Start(); //Start the process

        }
        catch (Exception e)
        {
            Console.WriteLine(e.Message); //Write the exception message
        }

        Thread.Sleep(3000); //Stop responding for 3 seconds

        if (myProcess.HasExited) //Continue if the process has exited
        {
            //The process has exited
            //Console.WriteLine("The process has exited");
        }
        else //Continue if the process has not exited
        {
            //myProcess.CloseMainWindow(); //Close the main Window
            myProcess.Kill(); //Terminate the process
        }

        Console.WriteLine("press [enter] to exit"); //Writes press [enter] to exit
        Console.Read(); //Waits for user input
    }
}

注意：如果您运行的是 IE8，您可能会注意到 Internet Explorer 8 已实现更改，其中多个打开的浏览器窗口或框架在所有打开的选项卡和窗口（包括用户打开的新 IE 框架窗口）中共享相同的会话 cookie。

您可以使用参数-nomerge运行进程IExplore.exe以运行新的 IE8 窗口会话，并避免将您创建的新进程与之前创建的进程合并（由 IE8 创建的默认进程与其他进程合并）。因此，拥有一个可以从应用程序控制的新进程，而不是由 IE8 创建的进程。

例子

Process myProcess = new Process(); //Initialize a new Process of name myProcess
ProcessStartInfo ps = new ProcessStartInfo(); //Initialize a new ProcessStartInfo of name ps

try
{
    ps.FileName = @"IExplore.exe"; //Set the target file name to IExplore.exe
    ps.Arguments = "-nomerge";
    ps.WindowStyle = ProcessWindowStyle.Normal; //Set the window state when the process is started to Normal
    myProcess.StartInfo = ps; //Associate the properties to pass to myProcess.Start() from ps
    myProcess.Start(); //Start the process
}
catch (Exception e)
{
    Console.WriteLine(e.Message); //Write the exception message
}

Thread.Sleep(3000); //Stop responding for 3 seconds

if (myProcess.HasExited) //Continue if the process has exited
{
    //The process has exited
    //Console.WriteLine("The process has exited");
}
else //Continue if the process has not exited; evaluated if the process was not exited.
{
    myProcess.Kill(); //Terminate the process
}

-1此外，如果 IE8 的进程意外终止，1如果它被用户终止，并且0如果退出将控制权传递给另一个实例，则进程退出代码将等于。

谢谢，
我希望你觉得这有帮助:)

于 2013-01-29T14:51:20.417 回答