C# 如何打印出子流程用C打印的值？

正如本文所要求的，我可以使用Python的subprocess.Popen函数打印出运行ruby代码的值

import subprocess
import sys

cmd = ["ruby", "/Users/smcho/Desktop/testit.rb"]
p = subprocess.Popen(cmd, stdout=subprocess.PIPE)
for line in iter(p.stdout.readline, ''):
    print line, 
    sys.stdout.flush() 
p.wait()

---

我如何用C做同样的事情？如何打印子进程打印出的值？

生成子进程时需要重定向标准输出；MSDN有一个完整的例子：

从MSDN：

 // Start the child process.
 Process p = new Process();
 // Redirect the output stream of the child process.
 p.StartInfo.UseShellExecute = false;
 p.StartInfo.RedirectStandardOutput = true;
 p.StartInfo.FileName = "Write500Lines.exe";
 p.Start();
 // Do not wait for the child process to exit before
 // reading to the end of its redirected stream.
 // p.WaitForExit();
 // Read the output stream first and then wait.
 string output = p.StandardOutput.ReadToEnd();
 p.WaitForExit();

---

您需要研究从进程对象重定向标准输出。接受的答案显示了如何异步执行。

ProcessStartInfo psi = new ProcessStartInfo("ruby", "/Users/smcho/Desktop/testit.rb");
psi.RedirectStandardOuput = true;W    
Process proc = new Process(psi);
proc.Start();
StreamReader stdout = proc.StandardOutput;
string line;
while ((line = stdout.ReadLine()) != null)
   Console.WriteLine(line);