Click here to Skip to main content
Click here to Skip to main content

Redirecting Text Output to a File from a Console Application

, 17 Jun 2008 CPOL
Rate this:
Please Sign up or sign in to vote.
A short article describing how to redirect text output from a console application to a file.

Introduction

I decided to write this article after being unable to find any example code on how to redirect console output to a file. There were examples of writing to a memory stream but I needed to output to a file because I was worried about the potential size of the memory stream required to do what I wanted. I had much help from my friend Armand so I would like to have him credited as a major contributor.

Background

I was experiencing errors when I used the redirection within the arguments sent to the process.

My code was written to back up a MySQL database using the tool mysqldump.exe but it should be easily changed to work with other console applications.

Using the Code

The sample is quite small. I have used comments to describe the process.

StreamWriter _outputStream;

// Called asynchronously with a line of data
private void OnDataReceived(object Sender, DataReceivedEventArgs e)
{
    if ((e.Data != null)&&(_outputStream != null))
        _outputStream.WriteLine(e.Data);
}

public void BackupLocalDatabase(string DatabaseName, string UserID, string Password,
    string OutputFilename)
{
#region BackupLocalDatabase
    string fnName = "BackupLocalDatabase";
    try
    {
        _outputStream = new StreamWriter(OutputFilename);
        try
        {
            // --databases to force CREATE DATABASE
            // --hex-blob to force output of blobs as hex strings
            string _args = string.Format(
                " --databases {0} --user={1} --password={2} --hex-blob",
                DatabaseName, UserID, Password);

            // Info object
            ProcessStartInfo _info = new ProcessStartInfo("mysqldump");
            _info.Arguments = _args;
            _info.UseShellExecute = false;
            _info.RedirectStandardError = true;
            _info.RedirectStandardOutput = true;

            // Process object
            Process _process = new Process();
            _process.StartInfo = _info;

            // Set up the event handler to call back with
            // each line of output
            _process.OutputDataReceived += new DataReceivedEventHandler(OnDataReceived);
            _process.Start();
            _process.BeginOutputReadLine();
            _process.WaitForExit();

            //TODO error checks here

        }
        finally
        {
            _outputStream.Flush();
            _outputStream.Close();
        }
    }
    catch (Exception e)
    {
        LogException(fnName, e);
        throw e;
    }
#endregion
}// function

History

2008-06-16 Written

License

This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Share

About the Author

czeshirecat

United Kingdom United Kingdom
No Biography provided

Comments and Discussions

 
QuestionCould you please improve your article? PinmemberCuchuk Sergey23-Jun-08 2:11 
GeneralInteresting Pinmembermerlin98118-Jun-08 4:50 
GeneralRe: Interesting PinmemberCuchuk Sergey23-Jun-08 2:12 
GeneralRe: Interesting Pinmemberwizardzz11-Dec-12 12:00 
I just thought the same thing while reading the article.
QuestionWhat problems? PinmemberPIEBALDconsult17-Jun-08 7:01 
QuestionAm I missing something obvious? PinmemberHumble Programmer17-Jun-08 6:52 
AnswerRe: Am I missing something obvious? PinmemberCuchuk Sergey23-Jun-08 2:08 

General General    News News    Suggestion Suggestion    Question Question    Bug Bug    Answer Answer    Joke Joke    Rant Rant    Admin Admin   

Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.

| Advertise | Privacy | Terms of Use | Mobile
Web04 | 2.8.141216.1 | Last Updated 17 Jun 2008
Article Copyright 2008 by czeshirecat
Everything else Copyright © CodeProject, 1999-2014
Layout: fixed | fluid