C# WPF read console output

Question

I'm writing an app that displays your current hashrate in Ethereum (A cryptocurrency like Bitcoin), and I need to somehow get the continuous output from the Command line that is running. This is what I have so far, but it is not printing to the program output:

 pProcess.OutputDataReceived += new DataReceivedEventHandler((sender, e) =>
{
    // Prepend line numbers to each line of the output.
    if (!String.IsNullOrEmpty(e.Data))
    {
        System.Console.Write(e.Data);
    }
});

//Wait for process to finish
pProcess.WaitForExit();

What is not working with this code? I'm guessing there's something messed up with the event handler, but I don't know what.

Are you calling any process?? Like Process aNewProcess = new Process(); — bluetoothfx, Apr 06 '16 at 19:55
sorry, here's a download of the whole project: https://mega.nz/#F!P1cW2JRI — MattyAB, Apr 06 '16 at 19:58
I want to have en event triggered when a new line gets written to the console, as well as the line itself being sent to a string so that it can be parsed and used later on in the code. — MattyAB, Apr 06 '16 at 20:00
Or here is the link with the key: https://mega.nz/#F!P1cW2JRI!VSkBWXWz8PDBrCN08Lm4jQ — MattyAB, Apr 06 '16 at 20:01
Probably a duplicate of this: http://stackoverflow.com/q/11631443/1136211 — Clemens, Apr 06 '16 at 20:14
I put pProcess.BeginOutputReadLine(); into my code, and that sends (and doesn't print in the cmd) the first command to the console, and then continues normally. — MattyAB, Apr 06 '16 at 20:23
I put it right after the pProcess.Start(); was this correct? — MattyAB, Apr 06 '16 at 20:23
Anyone else got any idea? Just to make it clear, I want an event to trigger every time a new line gets written to the cmd, and then I need to be able to read what that line was as well. — MattyAB, Apr 07 '16 at 07:56

bluetoothfx · Answer 1 · 2016-04-06T21:04:43.310

Copy and paste it to your code I modified it for you:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;
using System.Diagnostics;

    namespace ETHMinerVisualiser
    {
        /// <summary>
        /// Interaction logic for MainWindow.xaml
        /// </summary>
        public partial class MainWindow : Window
        {
            public MainWindow()
            {
                InitializeComponent();
            }

            private void MineButton_Click(object sender, RoutedEventArgs e)
            {
                Task.Run(() => { startMining(); });
            }

            public void startMining()
            {
                //Create process
                System.Diagnostics.Process pProcess = new System.Diagnostics.Process();

                //strCommand is path and file name of command to run
                pProcess.StartInfo.FileName = @"E:/Documents/ETH/ETHMinerVisualiser/ethminer-cuda-0.9.41-new/ethminer.exe";

                //strCommandParameters are parameters to pass to program
                pProcess.StartInfo.Arguments = "-F eu1.ethermine.org:5555/0x9c3f6281b123541f10c9bf37a8f273aa2a774d17.PCGPU -C";

                pProcess.StartInfo.UseShellExecute = false;


                //Set output of program to be written to process output stream
                pProcess.StartInfo.RedirectStandardOutput = true;

                //Optional
                pProcess.StartInfo.WorkingDirectory = "";

                //Start the process
                pProcess.Start();

                //pProcess.StartInfo.CreateNoWindow = true;

                //pProcess.BeginOutputReadLine();

                pProcess.OutputDataReceived += new DataReceivedEventHandler((sender, e) =>
                {
                    // Prepend line numbers to each line of the output.
                    if (!String.IsNullOrEmpty(e.Data))
                    {
                        //System.Console.Write(e.Data);                   
                        Debug.WriteLine(e.Data);
                    }
                });

                //Wait for process to finish
                pProcess.BeginOutputReadLine();

                pProcess.WaitForExit();
            }
        }
    }

I don't get any output in the program out, only 'The thread 0x1448 has exited with code 0 (0x0)' — MattyAB, Apr 06 '16 at 20:38
Correct this....I think you copied my location....pProcess.StartInfo.FileName = @"E:/Documents/ETH/ETHMinerVisualiser/ethminer-cuda-0.9.41-new/ethminer.exe"; — bluetoothfx, Apr 06 '16 at 20:41
but... that's not what I want... I want the Program output mirroring the cmd output. What did you think I meant? did I not explain it correctly? sorry if so. — MattyAB, Apr 06 '16 at 20:42
Let us [continue this discussion in chat](http://chat.stackoverflow.com/rooms/108444/discussion-between-bluetoothfx-and-mattyab). — bluetoothfx, Apr 06 '16 at 20:44

C# WPF read console output

1 Answers1