c# - 运行外部进程，等待程序结束，获取退出代码并保持控制台打开？

Question

我想一个一个地运行几个程序，但有时我想保持他们的控制台窗口打开以查看消息/错误

有没有可能运行cmd.exe /K anotherProgram.exe，等到另一个程序完成（WaitForExit()）并获取另一个程序的退出代码？或者，也许我可以以其他方式保持控制台打开，而不是从中运行它cmd /K？

Answer 1

您可以捕获控制台程序的输出和错误流以获取消息/错误。这样你也可以获得程序的退出代码。

查看Process类中可用的事件：

Process.OutputDataReceived Event ==> 使用它来捕获标准输出消息

Process.ErrorDataReceived Event ==> 使用它来捕获错误消息

Process.Exited Event ==> 使用它来获取退出代码

以下是有关格式化驱动器的示例（没有异常处理和参数测试），其中控制台窗口不可见，输出和错误流被捕获并显示在消息框中。退出过程也会检查退出代码。

private Process formatProc;

Private void DoFormat(string driveLetter) 
    this.formatProc = new Process
    {
        StartInfo =
            {
                UseShellExecute = false,
                FileName = "format.com",
                Arguments = string.Format("/FS:FAT {0}: /V: /Q", driveLetter),
                RedirectStandardInput = true,
                RedirectStandardOutput = true,
                RedirectStandardError = true,
                CreateNoWindow = true,
                WindowStyle = ProcessWindowStyle.Hidden
            },
        EnableRaisingEvents = true
    };

    this.formatProc.OutputDataReceived += this.ProcOutputDataReceivedHandler;
    this.formatProc.ErrorDataReceived += this.ProcErrorDataReceivedHandler;
    this.formatProc.Exited += this.ProcExitedHandler;

    this.formatProc.Start();
    this.formatProc.BeginOutputReadLine();
    this.formatProc.BeginErrorReadLine();
}

private void ProcOutputDataReceivedHandler(object sendingProcess, DataReceivedEventArgs e)
{
    if (string.IsNullOrEmpty(e.Data))
    {
        MessageBox.Show(e.Data);
    }
}

private void ProcErrorDataReceivedHandler(object sendingProcess, DataReceivedEventArgs e)
{
    if (string.IsNullOrEmpty(e.Data))
    {
        MessageBox.Show(e.Data);
    }
}

private void ProcExitedHandler(object sender, EventArgs e)
{
    var exitCode = this.formatProc.ExitCode;
    var message = string.Empty;
    switch (exitCode)
    {
        case 0: 
            message = "Format done.";
            break;
        case 1:
            message = "Format failed. Incorrect parameters were supplied.";
            break;
        case 4:
            message = "Format failed. A fatal error occurred.";
            break;
        case 5:
            message = "Format ended by user.";
            break;
        default:
            message = "Format failed. ExitCode = " + this.formatProc.ExitCode;
            break;
    }

    this.formatProc.Dispose();
    MessageBox.Show(message);
}