Reading & Writing Binary files


DevX Home    Today's Headlines   Articles Archive   Tip Bank   Forums   

Results 1 to 3 of 3

Thread: Reading & Writing Binary files

Threaded View

  1. #1
    Join Date
    Aug 2005
    Posts
    2

    Reading & Writing Binary files

    Hi,

    I am attempting to read a binary file and then write the contents to a new file. However for some reason some extra characters are placed at the top of the destination file apart from that the files are identical.

    Here is the code:

    Code:
    Option Explicit
    
    Private Sub Form_Load()
    
        Call writeBinFile(App.Path & "\copy.zip", readBinFile(App.Path & "\original.zip"))
    
    End Sub
    
    Function writeBinFile(ByVal bfilename As String, data As Variant)
        Dim FileNum As Long
    
        FileNum = FreeFile
        Open bfilename For Binary Access Write As #FileNum
        
        Put #FileNum, , data
        
        Close #FileNum
    
    End Function
    
    Function readBinFile(ByVal bfilename As String) As Variant
        Dim fl As Long
        Dim FileNum As Long
        Dim binbyte() As Byte
        Dim binfilestr As String
    
        On Error GoTo errHandler
    
        FileNum = FreeFile
        Open bfilename For Binary Access Read As #FileNum
    
        fl = FileLen(bfilename)
        ReDim binbyte(fl)
    
        Get #FileNum, , binbyte
    
        Close #FileNum
    
        readBinFile = binbyte
        Exit Function
    
    errHandler:
              Exit Function
    End Function
    I don’t believe the readBinFile function is causing the problem since its documented on Microsoft’s website http://support.microsoft.com/default...b;en-us;193998

    *confused* the attached pictures shows the unknown data appended at the beginning of the file.

    PS: The solution can not be achieved by simply copying the file.
    Attached Images Attached Images

Similar Threads

  1. Binary files
    By jojo in forum VB Classic
    Replies: 1
    Last Post: 08-21-2005, 08:50 PM
  2. Replies: 7
    Last Post: 06-23-2005, 10:39 PM
  3. Reading Large Binary Files for String Operations
    By Ryan Shelley in forum Java
    Replies: 0
    Last Post: 01-16-2002, 05:57 PM
  4. Reading binary data from SQL Server database
    By Danny Desmet in forum VB Classic
    Replies: 2
    Last Post: 09-22-2000, 02:15 AM
  5. Reading binary file
    By Russ McTyre in forum Java
    Replies: 1
    Last Post: 06-13-2000, 11:14 AM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
HTML5 Development Center
 
 
FAQ
Latest Articles
Java
.NET
XML
Database
Enterprise
Questions? Contact us.
C++
Web Development
Wireless
Latest Tips
Open Source


   Development Centers

   -- Android Development Center
   -- Cloud Development Project Center
   -- HTML5 Development Center
   -- Windows Mobile Development Center