C# 调用外部程序，并获取输出和错误信息

1. 同步模式

public void exec(string exePath, string parameters)
        {
            System.Diagnostics.ProcessStartInfo psi =
   new System.Diagnostics.ProcessStartInfo();
            psi.RedirectStandardOutput = true;
            psi.RedirectStandardError = true;
            psi.WindowStyle = System.Diagnostics.ProcessWindowStyle.Hidden;
            psi.UseShellExecute = false;
            psi.FileName = exePath;
            psi.Arguments = parameters;
            System.Diagnostics.Process process = System.Diagnostics.Process.Start(psi);
            System.IO.StreamReader outputStreamReader = process.StandardOutput;
            System.IO.StreamReader errStreamReader = process.StandardError;
            process.WaitForExit(2000);
            if (process.HasExited)
            {
                string output = outputStreamReader.ReadToEnd();
                string error = errStreamReader.ReadToEnd();
                MessageBox.Show(output);
                MessageBox.Show(error);
            }

        }

2.异步模式

 public void exec(string exePath, string parameters)
        {
            Process process = new System.Diagnostics.Process();
            process.StartInfo.FileName = exePath;
            process.StartInfo.Arguments = parameters;
            process.StartInfo.UseShellExecute = false;
            process.StartInfo.CreateNoWindow = true;
            process.StartInfo.RedirectStandardOutput = true;
            process.Start();
            process.BeginOutputReadLine();
            process.OutputDataReceived += new DataReceivedEventHandler(processOutputDataReceived);
        }

        private void processOutputDataReceived(object sender, DataReceivedEventArgs e)
        {
            MessageBox.Show(e.Data); 
        }