从控制台程序读取输出

我需要在C++/NET中读取来自原生C++控制台应用程序的输出。关于这一点,有很多文章,但大多数都要等到进程结束后才能读取输出,我不想这样做,我需要在进程“完成”之后立即读取输出(这样做时不想阻塞GUI,但这是我自己能做的)。我试过两种方法。一:

Diagnostics::Process ^process = gcnew Diagnostics::Process;
process->StartInfo->FileName = pathToExecutable;
process->StartInfo->RedirectStandardOutput = true;
process->StartInfo->UseShellExecute = false;
process->StartInfo->CreateNoWindow = true;
process->StartInfo->Arguments = "some params";
process->EnableRaisingEvents = true;
process->OutputDataReceived += gcnew Diagnostics::DataReceivedEventHandler( GUI::Form1::consoleHandler );
process->Start();
    process->BeginOutputReadLine();

处理人:

    System::Void GUI::Form1::consoleHandler( System::Object^ sendingProcess, System::Diagnostics::DataReceivedEventArgs^ outLine ){
         GUI::Form1::contentForConsole += outLine->Data + "\n";
    }

但调试器确认只有在进程完成后才调用它。

第二次尝试时,我尝试创建自定义监视线程:

Diagnostics::Process ^process = gcnew Diagnostics::Process;
process->StartInfo->FileName = pathToExecutable;
process->StartInfo->RedirectStandardOutput = true;
process->StartInfo->RedirectStandardError = true;
process->StartInfo->UseShellExecute = false;
process->StartInfo->CreateNoWindow = true;
process->StartInfo->Arguments = "some params";

    processStatic = process; // static class member

process->Start();

System::Windows::Forms::MethodInvoker^ invoker = gcnew System::Windows::Forms::MethodInvoker(reader);
invoker->BeginInvoke(nullptr, nullptr);

以及thread函数,它等待readline函数,直到进程完成:

System::Void GUI::Form1::reader(){
    System::String^ str;
    while ((str = geogenProcess->StandardOutput->ReadLine()) != nullptr)
    {
        contentForConsole += str; // timer invoked handler then displays this, but this line is called only once the process is finished
    }   
}

流程可执行文件在一段时间内输出多行文本,范围从几秒到几分钟(取决于实际任务)。