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how to start reading information...

Posted on 1999-01-15
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Last Modified: 2010-05-03
I would like to make a control to put a bunch of files together and then seperate them. My first problem is... how do I open the file(meaning any file) and start reading the information of that file into VB? It should not matter what file it is or what it contains... The computer sees it the same way. (Just a bunch of numbers) right???
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Question by:rpg_rpg
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7 Comments
 
LVL 6

Expert Comment

by:clifABB
ID: 1456622
Use:
Open "TESTFILE" For Binary Access Write As #1

Then use Get to input the data:
Get #1, , vVar


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LVL 4

Expert Comment

by:chabaud
ID: 1456623
... Access Read ...
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LVL 12

Expert Comment

by:mark2150
ID: 1456624
Good catch Chabaud!

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Author Comment

by:rpg_rpg
ID: 1456625
so what is vVar  going to = ? the entire file or just the first byte... And after?
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LVL 6

Expert Comment

by:clifABB
ID: 1456626
Vvar will equal the first byte the first time it is called, every subsequent call, it will be equal to the next byte.

So, to read an entire file a byte at a time, this code will work:
  Dim btVar  As Byte
  Dim nFile  As Integer

  nFile = FreeFile

  Open "TESTFILE" For Binary Access Read As #nFile
  Do Until EOF(nFile)
    Get #nFile, , btVar

    'Do what you want with btVar
    Debug.Print btVar
  Loop
  Close #nFile

(Thanks to chabaud for pointing out my Access Write error)
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Author Comment

by:rpg_rpg
ID: 1456627
clifABB: you did not use this as an answer. Could you please.
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LVL 6

Accepted Solution

by:
clifABB earned 200 total points
ID: 1456628
Thank you.

So, to read an entire file a byte at a time, this code will work:
  Dim btVar  As Byte
  Dim nFile  As Integer

  nFile = FreeFile

  Open "TESTFILE" For Binary Access Read As #nFile
  Do Until EOF(nFile)
    Get #nFile, , btVar

    'Do what you want with btVar
    Debug.Print btVar
  Loop
  Close #nFile

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