Convert / transform csv into txt file using .net / C#

Hi All

I wish to do the following:

Loop via parent folder through all sub folders, and convert each csv file into a txt.

There are many csv to xml or txt to xml solutions, etc but I had trouble finding a solution for this.

I was thinking to convert to xml, but it is best for me to convert to txt format as it suits my needs.

thanks in advance for your help
datavissAsked:
Who is Participating?
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

IanThCommented:
easy

do an array for the input and read the csv file in and then when finished input write out the array to a txt file
for instance  

public infile as new streamreader     'for the input
public outfile as new streamwriter    ' for output
dim input_array (x,y) as array
dim inputfile as string

If File.Exists(inputfile) Then
            Dim reader As New StreamReader(inputfile, True)
            Dim s As String = reader.ReadLine()
            reader.Close()
            If Not (s Is Nothing) AndAlso s.Length > 0 Then
                'nothing in file
            Else
                'code to write array
            End If
        Else
            Dim f As FileStream = File.Create(infile)
            f.Close()
            end If


to write it something like
for a= 1++ to arraymax
filename = String.Format("c:\ians\{0:g}log.csv", DateTime.Now.Day & DateTime.Now.Month & DateTime.Now.Year)
            outfile = New StreamWriter(filename, False)
           
0
datavissAuthor Commented:
Hi thanks for the response

I wanted to use the same fileName as per original .csv files, and it seems that this method does not loop through the parent and checks for sub folders if they exist, and process those too.

thanks
0
Wayne Taylor (webtubbs)Commented:
Umm, a CSV file *is* a text file. It's just a flat text file with Comma Seperated Values (hence the name).

So, seeing as it's already a text file, if you want to change the extension to "txt", use the My.Computer.FileSystem.RenameFile method...

http://msdn.microsoft.com/en-us/library/2ce15by3.aspx

Wayne
0
Introduction to R

R is considered the predominant language for data scientist and statisticians. Learn how to use R for your own data science projects.

datavissAuthor Commented:
Apologies I will explain myself better...

I am looking to change the format from csv to tab delimited separate values (tsv) of each csv file in the current and sub folder paths

thanks
0
IanThCommented:
yes you will need to strip out the commas and thats why you need an array as yyou can read it in as a csv into the array and then write it to a text file straight from the array
0
Mike TomlinsonMiddle School Assistant TeacherCommented:
Here's the basic algorithm...
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.IO;

namespace WindowsFormsApplication1
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            string pattern = "*.csv";
            string RootFolder = @"c:\some\path\root\folder";
            RecurseFolders(new DirectoryInfo(RootFolder), pattern);
        }

        private void RecurseFolders(DirectoryInfo di, string pattern)
        {
            foreach (FileInfo fi in di.GetFiles(pattern))
            {
                ConvertCSVtoTabDelimited(fi);
            }
            foreach (DirectoryInfo subDi in di.GetDirectories())
            {
                RecurseFolders(subDi, pattern);
            }
        }

        private void ConvertCSVtoTabDelimited(FileInfo fi)
        {
            try
            {
                System.IO.File.WriteAllText(fi.FullName, System.IO.File.ReadAllText(fi.FullName).Replace(",", "\t"));
            }
            catch (Exception ex)
            {
                MessageBox.Show("File: " + fi.FullName + Environment.NewLine + Environment.NewLine + ex.ToString(), "Error Converting File", MessageBoxButtons.OK, MessageBoxIcon.Error);
            }
        }

    }
}

Open in new window

0

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
Mike TomlinsonMiddle School Assistant TeacherCommented:
*If you want to create a new file in the same location, but with a .tsv extension instead of .csv, then change the ConvertCSVtoTabDelimited() method to:
        private void ConvertCSVtoTabDelimited(FileInfo fi)
        {
            try
            {
                string NewFileName = Path.Combine(Path.GetDirectoryName(fi.FullName),   Path.GetFileNameWithoutExtension(fi.FullName) + ".tsv");
                System.IO.File.WriteAllText(NewFileName, System.IO.File.ReadAllText(fi.FullName).Replace(",", "\t"));
            }
            catch (Exception ex)
            {
                MessageBox.Show("File: " + fi.FullName + Environment.NewLine + Environment.NewLine + ex.ToString(), "Error Converting File", MessageBoxButtons.OK, MessageBoxIcon.Error);
            }
        }

Open in new window

0
datavissAuthor Commented:
thanks for that as i addressed all my requirements
0
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
.NET Programming

From novice to tech pro — start learning today.