CODEWITHSUNDEEP
c#console-application
user2997204
user2997204

Reputation: 1384

How to redirect the output from the console?

I'm currently trying to read the outputstream from an external console application. I can not modify this application.

This is to code i'm currently using:

        Process process = new Process();
        string dir = Directory.GetCurrentDirectory();
        process.StartInfo.FileName = dir + "/volibot.exe";
        process.StartInfo.UseShellExecute = false;
        process.Start();
        //do some stuff with the stream

I use this to read the outputstream:

            while (!process.StandardOutput.EndOfStream)
            {
                string message = process.StandardOutput.ReadLine();
                Console.WriteLine(message);
            }

But whenever I add:

        process.StartInfo.RedirectStandardOutput = true;

I get this error:

Unhandled exception: System.IO.IOException: The handle is invalid.

   bij System.IO.__Error.WinIOError(Int32 errorCode, String maybeFullPath)
   bij System.IO.__Error.WinIOError()
   bij System.Console.SetWindowSize(Int32 width, Int32 height)
   bij RitoBot.Core.Main(String[] args)

This doesn't make sense because this is a console application? How can I fix this problem? Or is there a simple work around?

Edit: Tried this: ProcessInfo and RedirectStandardOutput

    static void Main(string[] args)
    {
        //C:\\Users\\pc\\Documents\\Visual Studio 2013\\Projects\\ConsoleApplication1\\ConsoleApplication1\\bin\\Debug\\VoliBot.exe
        Process build = new Process();
        build.StartInfo.WorkingDirectory = @"C:\\Users\\pc\\Documents\\Visual Studio 2013\\Projects\\ConsoleApplication1\\ConsoleApplication1\\bin\\Debug\\";
        build.StartInfo.Arguments = "";
        build.StartInfo.FileName = "volibot.exe";

        build.StartInfo.UseShellExecute = false;
        build.StartInfo.RedirectStandardOutput = true;
        build.StartInfo.RedirectStandardError = true;
        build.StartInfo.CreateNoWindow = true;
        build.ErrorDataReceived += build_ErrorDataReceived;
        build.OutputDataReceived += build_ErrorDataReceived;
        build.EnableRaisingEvents = true;
        build.Start();
        build.BeginOutputReadLine();
        build.BeginErrorReadLine();
        build.WaitForExit();

        Console.ReadLine();

    }

    static void build_ErrorDataReceived(object sender, DataReceivedEventArgs e)
    {
        string strMessage = e.Data;
        Console.WriteLine(strMessage);
    }

Still didnt work :s

Upvotes: 3

Views: 519

Answers (2)

dean
dean

Reputation: 81

You have @"C:\Users\pc\Documents...." you don't need double \ when you use the @ sign..

maybe it is that?

Upvotes: 0

dean
dean

Reputation: 81

Try something like:

var psi = new ProcessStartInfo(@"c:\temp\mycommand.exe", String.Format(" \"{0}\" \"{1}\" \"{2}\"", sourceDoc, dataSource, outputFile))
        {
            WorkingDirectory = Environment.CurrentDirectory,
            UseShellExecute = false,
            RedirectStandardOutput = true,
            RedirectStandardError = true,
            CreateNoWindow = false
        };

        using (var process = new Process { StartInfo = psi })
        {
            process.Start();
             process.BeginErrorReadLine();
              process.BeginOutputReadLine();

            // wait for the process to exit
            process.WaitForExit();


            if (process.ExitCode != 0)
            {

            }
        }
    }

Upvotes: 1

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