c# - 重定向输出时控制台窗口不可见

Question

我正在使用 .NET 4 控制台应用程序中的以下代码:

private static void AttachToConsole ()
{
    System.Diagnostics.Process process = null;

    process = new Process();
    process.StartInfo.FileName = "cmd.exe";
    process.StartInfo.RedirectStandardInput = true;
    process.StartInfo.RedirectStandardOutput = true;
    process.StartInfo.UseShellExecute = false;
    process.StartInfo.CreateNoWindow = false;
    process.EnableRaisingEvents = true;
    process.Start();

    process.OutputDataReceived += new DataReceivedEventHandler(Process_OutputDataReceived);

    Console.Write("Press any key to continue...");
    Console.ReadKey();

    process.OutputDataReceived -= new DataReceivedEventHandler(Process_OutputDataReceived);
    process.CloseMainWindow();
    process.Close();
}

运行时，只有应用程序本身的控制台窗口会显示，但 [cmd.exe] 进程窗口仍然不可见。为什么会这样？我该如何改变这种行为？

Answer 1

如果您设置 UseShellExecute = true，cmd 进程窗口将会出现。但是，您需要将 RedirectStandardInput 和 RedirectStandardpOutput 设置为“false”(或将它们注释掉)。

private static void AttachToConsole ()
{
    System.Diagnostics.Process process = null;

    process = new Process();
    process.StartInfo.FileName = "cmd.exe";
    //process.StartInfo.RedirectStandardInput = true;
    //process.StartInfo.RedirectStandardOutput = true;
    process.StartInfo.UseShellExecute = true;
    process.StartInfo.CreateNoWindow = false;
    process.EnableRaisingEvents = true;
    process.Start();

    process.OutputDataReceived += null;

    Console.Write("Press any key to continue...");
    Console.ReadKey();

    process.OutputDataReceived -= null;
    process.CloseMainWindow();
    process.Close();
}