Running an Executable and Collecting the Output using C#

Sometimes you may need in the middle of a C# application you want to run an executable and collect the output.  Below sample of code will do what you want.. 

1. Simple method:

 

Process P = Process.Start("eyeDetect.exe", "hello1.jpg haarcascade_frontalface_alt.xml haarcascade_eye.xml");

P.StartInfo.UseShellExecute = false;

P.WaitForExit();

int result = P.ExitCode;

Console.WriteLine("Here is my result " + result);

Console.ReadLine(); 

2. Descriptive Method:

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Diagnostics;

namespace ConsoleApplication1

{

    class Program

    {         

        static void Main(string[] args)

        { 

            StringBuilder Output = new StringBuilder(); 

            using (Process proc = new Process())

                {

                    proc.StartInfo.FileName = "eyeDetect.exe";

                    proc.StartInfo.Arguments = "hello1.jpg haarcascade_frontalface_alt.xml haarcascade_eye.xml";

                    proc.StartInfo.UseShellExecute = false;

                    proc.StartInfo.RedirectStandardOutput = true;

                    proc.StartInfo.RedirectStandardError = true;

                    proc.OutputDataReceived += (o, e) => Output.Append(e.Data).Append(Environment.NewLine);

                    proc.Start();

                    proc.BeginOutputReadLine();

                    proc.BeginErrorReadLine();

                    proc.WaitForExit();

                    int ExitCode = proc.ExitCode;

                }

                Console.WriteLine(Output);

                Console.ReadLine();

        }

    }

}