Solved

Writing an array to a text file and also writing it back to the array in VB 2005

Posted on 2006-11-25
5
269 Views
Last Modified: 2008-02-01
Hi Everyone,

I would like to write an array (8 values) to a text file, so save the values. I would then like to be able to read the values and populate the array with the values in the text value. Using the text file as a place to save the array values during different sessions if you will.

I would welcome any help pages, or advice on where I should look on how to acheive this.

Thanks,
Adam
0
Comment
Question by:eadam-uk
  • 2
  • 2
5 Comments
 
LVL 85

Expert Comment

by:Mike Tomlinson
ID: 18012136
What kind of Array are you dealing with?   Integer, String?...

If String, will there be any carriage returns in the values?
0
 
LVL 29

Accepted Solution

by:
Nightman earned 500 total points
ID: 18012169
Here's a very simple example:


  Private Sub BuildArrayAndTestReadWrite()
    Dim x(8) As String

    x(0) = "1"
    x(1) = "2"
    x(2) = "3"
    x(3) = "4"
    x(4) = "5"
    x(5) = "6"
    x(6) = "7"
    x(7) = "8"
    SaveArrayToFile(x)
    LoadArrayFromFile(x)


  End Sub

  Private Sub LoadArrayFromFile(ByRef x As Array)
    Dim sr As StreamReader
    Dim i As Integer
    sr = New StreamReader("SavedArray.txt")

    Do While sr.Peek() >= 0
      'This is an arbitrary size for this example.

      x(i) = sr.ReadLine()
      'The output will look odd, because
      'only five characters are read at a time.

      i = i + 1
    Loop
    sr.Close()

  End Sub

  Private Sub SaveArrayToFile(ByRef x As Array)
    Dim sw As StreamWriter = New StreamWriter("SavedArray.txt")
    Dim i As Integer
    For i = LBound(x) To UBound(x)
      sw.WriteLine(x(i))
    Next
    sw.Close()
  End Sub
0
 
LVL 29

Expert Comment

by:Nightman
ID: 18012173
You would have to use
Imports System.IO
in the class

Also - ignore the comments in the code (straight from the MSDN ;) - and adjusted slightly)
0
 
LVL 85

Expert Comment

by:Mike Tomlinson
ID: 18012407
You could do something like...

    Dim values() As String = {"a", "b", "c", "d", "e", "f", "g", "h"}

    ' To write the values...
    My.Computer.FileSystem.WriteAllText("C:\someFile.txt", String.Join("|", values), False)

    ' To read the values...
    values = My.Computer.FileSystem.ReadAllText("C:\someFile.txt").Split("|")

(given that "|" is not in the original strings...)
0
 

Author Comment

by:eadam-uk
ID: 18012906
Thanks nightman, worked a treat.

Sorry idle_mind I didnt see your final comment before I dished out the points, but thank you too!
0

Featured Post

Live: Real-Time Solutions, Start Here

Receive instant 1:1 support from technology experts, using our real-time conversation and whiteboard interface. Your first 5 minutes are always free.

Question has a verified solution.

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

Article by: Kraeven
Introduction Remote Share is a simple remote sharing tool, enabling you to see, add and remove remote or local shares. The application is written in VB.NET targeting the .NET framework 2.0. The source code and the compiled programs have been in…
A while ago, I was working on a Windows Forms application and I needed a special label control with reflection (glass) effect to show some titles in a stylish way. I've always enjoyed working with graphics, but it's never too clever to re-invent …
This Micro Tutorial will teach you how to censor certain areas of your screen. The example in this video will show a little boy's face being blurred. This will be demonstrated using Adobe Premiere Pro CS6.
This tutorial gives a high-level tour of the interface of Marketo (a marketing automation tool to help businesses track and engage prospective customers and drive them to purchase). You will see the main areas including Marketing Activities, Design …

776 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