Solved

VB.net code to Read all lines in Fixed Width text file and add characters in specific locations

Posted on 2009-07-02
4
615 Views
Last Modified: 2012-05-07
I am trying to code a small application which addresses a formatting issue in a text file received every month, its a fixed width file which has dates in a specific location such as 20090701 i need to change every line to read 2009-07-01 I was thinking maybe using streamreader or the like but cant quite figure this one out
0
Comment
Question by:nemesis1210
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 2
4 Comments
 
LVL 8

Expert Comment

by:bhmahler
ID: 24765931
You can read all the lines of the file into a string array using System.IO.File.ReadAllLines("PATH TO FILE"), then you can jsut loop through the array and adjust the lines as needed and rewrite them to the file.
0
 
LVL 2

Author Comment

by:nemesis1210
ID: 24766023
any chance you can point me to some sample code
0
 
LVL 86

Accepted Solution

by:
Mike Tomlinson earned 500 total points
ID: 24767045
Here's some example code:
        Dim FileName As String = "c:\some\file.txt"
        Dim Lines() As String = System.IO.File.ReadAllLines(FileName)
 
        Dim sb As New System.Text.StringBuilder
        For i As Integer = 0 To Lines.GetUpperBound(0)
            ' Pretend your date starts at Index 60.   (don't forget that indexes are ZERO based!)
            ' 20090701 --> 2009-07-01
            ' So we work BACKWARDS and insert at 66 and 64.
 
            ' Clear the StringBuilder and add the Current Line:
            sb.Length = 0
            sb.Append(Lines(i))
 
            ' Insert the Dashes
            sb.Insert(66, "-")
            sb.Insert(64, "-")
 
            ' put the changed line back in the array
            Lines(i) = sb.ToString
        Next
 
        System.IO.File.WriteAllLines(FileName, Lines)

Open in new window

0
 
LVL 2

Author Closing Comment

by:nemesis1210
ID: 31599290
Worked Perfectly thank you so much
0

Featured Post

On Demand Webinar - Networking for the Cloud Era

This webinar discusses:
-Common barriers companies experience when moving to the cloud
-How SD-WAN changes the way we look at networks
-Best practices customers should employ moving forward with cloud migration
-What happens behind the scenes of SteelConnect’s one-click button

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Article by: jpaulino
XML Literals are a great way to handle XML files and the community doesn’t use it as much as it should.  An XML Literal is like a String (http://msdn.microsoft.com/en-us/library/system.string.aspx) Literal, only instead of starting and ending with w…
Microsoft Reports are based on a report definition, which is an XML file that describes data and layout for the report, with a different extension. You can create a client-side report definition language (*.rdlc) file with Visual Studio, and build g…
In this video, viewers will be given step by step instructions on adjusting mouse, pointer and cursor visibility in Microsoft Windows 10. The video seeks to educate those who are struggling with the new Windows 10 Graphical User Interface. Change Cu…
This is my first video review of Microsoft Bookings, I will be doing a part two with a bit more information, but wanted to get this out to you folks.

705 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question