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basestring
 Post subject: CODE 39 Barcode Genarator
PostPosted: Wed Jun 01, 2011 10:58 pm 
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Joined: Sat May 28, 2011 11:28 pm
Posts: 130
Location: Beijing China
Hi,

I'm building an application that works with CODE39 Barcode.
For people that want to genarate barcode, can use this function with a canvas controll

here is the Fuction
Name: Create_Barcode
Prameters: barcode as string
Return type: String

dim newbarcode as string
dim x as integer
newbarcode = "010010100Q" //Start Symbole Q = Quiet Zone (narrow Blank bar)
// 1 = wide 0 = narrow
// say Letter A = 100001001Q this means wide black, narrow blank, narrow black, narrow blank, narrow Black, Wide Blank,
// narrow black, narrow blank, wide Black and Q as a narrow Blank line for a Intercharacter gap
// this makes 5 black bars for eacht Charecter
// like + is black and - is blank Q is gap
// Q++-+-+--+-++Q = Latter A
barcode = Uppercase(barcode)
for x=1 to len(barcode)
  if mid(barcode,x,1) = "0" then
    newbarcode = newbarcode + "000110100Q"
  end if
  if mid(barcode,x,1) = "1" then
    newbarcode = newbarcode + "100100001Q"
  end if
  if mid(barcode,x,1) = "2" then
    newbarcode = newbarcode + "001100001Q"
  end if
  if mid(barcode,x,1) = "3" then
    newbarcode = newbarcode + "101100000Q"
  end if
  if mid(barcode,x,1) = "4" then
    newbarcode = newbarcode + "000110001Q"
  end if
  if mid(barcode,x,1) = "5" then
    newbarcode = newbarcode + "100110000Q"
  end if
  if mid(barcode,x,1) = "6" then
    newbarcode = newbarcode + "001110000Q"
  end if
  if mid(barcode,x,1) = "7" then
    newbarcode = newbarcode + "000100101Q"
  end if
  if mid(barcode,x,1) = "8" then
    newbarcode = newbarcode + "100100100Q"
  end if
  if mid(barcode,x,1) = "9" then
    newbarcode = newbarcode + "101100000Q"
  end if
  if mid(barcode,x,1) = "A" then
    newbarcode = newbarcode + "100001001Q"
  end if
  if mid(barcode,x,1) = "B" then
    newbarcode = newbarcode + "001001001Q"
  end if
  if mid(barcode,x,1) = "C" then
    newbarcode = newbarcode + "101001000Q"
  end if
  if mid(barcode,x,1) = "D" then
    newbarcode = newbarcode + "000011001Q"
  end if
  if mid(barcode,x,1) = "E" then
    newbarcode = newbarcode + "100011000Q"
  end if
  if mid(barcode,x,1) = "F" then
    newbarcode = newbarcode + "001011000Q"
  end if
  if mid(barcode,x,1) = "G" then
    newbarcode = newbarcode + "000001101Q"
  end if
  if mid(barcode,x,1) = "H" then
    newbarcode = newbarcode + "100001100Q"
  end if
  if mid(barcode,x,1) = "I" then
    newbarcode = newbarcode + "001001100Q"
  end if
  if mid(barcode,x,1) = "J" then
    newbarcode = newbarcode + "000011100Q"
  end if
  if mid(barcode,x,1) = "K" then
    newbarcode = newbarcode + "100000011Q"
  end if
  if mid(barcode,x,1) = "L" then
    newbarcode = newbarcode + "001000011Q"
  end if
  if mid(barcode,x,1) = "M" then
    newbarcode = newbarcode + "101000010Q"
  end if
  if mid(barcode,x,1) = "N" then
    newbarcode = newbarcode + "000010011Q"
  end if
  if mid(barcode,x,1) = "O" then
    newbarcode = newbarcode + "100010010Q"
  end if
  if mid(barcode,x,1) = "P" then
    newbarcode = newbarcode + "001010010Q"
  end if
  if mid(barcode,x,1) = "Q" then
    newbarcode = newbarcode + "000000111Q"
  end if
  if mid(barcode,x,1) = "R" then
    newbarcode = newbarcode + "1000000110"
  end if
  if mid(barcode,x,1) = "S" then
    newbarcode = newbarcode + "001000110Q"
  end if
  if mid(barcode,x,1) = "T" then
    newbarcode = newbarcode + "000010110Q"
  end if
  if mid(barcode,x,1) = "U" then
    newbarcode = newbarcode + "110000001Q"
  end if
  if mid(barcode,x,1) = "V" then
    newbarcode = newbarcode + "011000001Q"
  end if
  if mid(barcode,x,1) = "W" then
    newbarcode = newbarcode + "111000000Q"
  end if
  if mid(barcode,x,1) = "X" then
    newbarcode = newbarcode + "010010001Q"
  end if
  if mid(barcode,x,1) = "Y" then
    newbarcode = newbarcode + "110010000Q"
  end if
  if mid(barcode,x,1) = "Z" then
    newbarcode = newbarcode + "011010000Q"
  end if
  
  if mid(barcode,x,1) = "-" then
    newbarcode = newbarcode + "010000101Q"
  end if
  if mid(barcode,x,1) = "." then
    newbarcode = newbarcode + "110000100Q"
  end if
  if mid(barcode,x,1) = " " then
    newbarcode = newbarcode + "011000100Q" //Space
  end if
  if mid(barcode,x,1) = "/" then
    newbarcode = newbarcode + "010100010Q"
  end if
  if mid(barcode,x,1) = "+" then
    newbarcode = newbarcode + "010001010Q"
  end if
  if mid(barcode,x,1) = "%" then
    newbarcode = newbarcode + "000101010Q"
  end if
next x
newbarcode = newbarcode + "010010100" //End Symbole
return newbarcode


for the form, i have a textfield1 where you can type the next or numbers for the Barcode, a canvas1 with a height of 100 (width will change in the code) and a button with the following code

const White = &cffffff
const Black = &c000000
dim barcode as string
dim barcode_picture as Graphics
dim barcodesize as integer
dim x as Integer
dim drawpos as integer


barcode = Create_Barcode (TextField1.text)
barcodesize=20
for x =1 to len(barcode)
  if mid(barcode,x,1) = "0" then barcodesize = barcodesize + 1
  if mid(barcode,x,1) = "Q" then barcodesize = barcodesize + 1
  if mid(barcode,x,1) = "1" then barcodesize = barcodesize + 2
next x


canvas1.Width = barcodesize * 2
barcodesize = barcodesize * 2
canvas1.graphics.ForeColor = white
canvas1.Refresh

for x=1 to 20
  canvas1.Graphics.DrawLine x,1,x,100
next x
Canvas1.Graphics.ForeColor=black
drawpos = 21

for x = 1 to len(barcode)
  
  if mid(barcode,x,1) = "0" then
    canvas1.Graphics.DrawLine drawpos,1,drawpos,100
    drawpos = drawpos+1
    canvas1.Graphics.DrawLine drawpos,1,drawpos,100
    drawpos = drawpos+1
    if canvas1.graphics.ForeColor = white then
      canvas1.graphics.ForeColor = black
    else
      canvas1.graphics.ForeColor = white
    end if
  end if
  if mid(barcode,x,1) = "1" then
    canvas1.Graphics.DrawLine drawpos,1,drawpos,100
    drawpos = drawpos+1
    
    canvas1.Graphics.DrawLine drawpos,1,drawpos,100
    drawpos = drawpos+1
    
    canvas1.Graphics.DrawLine drawpos,1,drawpos,100
    drawpos = drawpos+1
    
    canvas1.Graphics.DrawLine drawpos,1,drawpos,100
    drawpos = drawpos+1
    if canvas1.graphics.ForeColor = white then
      canvas1.graphics.ForeColor = black
    else
      canvas1.graphics.ForeColor = white
    end if
  end if
  if mid(barcode,x,1) = "Q" then
    canvas1.graphics.ForeColor = white
    canvas1.Graphics.DrawLine drawpos,1,drawpos,100
    drawpos = drawpos+1
    canvas1.Graphics.DrawLine drawpos,1,drawpos,100
    drawpos = drawpos+1
    canvas1.graphics.ForeColor = black
  end if
next x
canvas1.graphics.ForeColor = white
for x = drawpos to drawpos + 20
  canvas1.Graphics.DrawLine x,1,x,100
next x

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timhare
 Post subject: Re: CODE 39 Barcode Genarator
PostPosted: Thu Jun 02, 2011 2:03 am 
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Joined: Fri Jan 06, 2006 3:21 pm
Posts: 12388
Location: Portland, OR USA
Or use a barcode font with DrawString. Drawing your own barcodes is iffy at best.
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swort
 Post subject: Re: CODE 39 Barcode Genarator
PostPosted: Thu Jun 02, 2011 9:57 am 
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Joined: Mon May 31, 2010 5:35 am
Posts: 2412
Location: Netherlands
Can i add this function with your permission to the DutchTools (public MIT licence) module ?

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basestring
 Post subject: Re: CODE 39 Barcode Genarator
PostPosted: Thu Jun 02, 2011 4:32 pm 
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Joined: Sat May 28, 2011 11:28 pm
Posts: 130
Location: Beijing China
Sure, no problem

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Goofie
 Post subject: Re: CODE 39 Barcode Genarator
PostPosted: Fri Jun 03, 2011 12:40 am 
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Joined: Tue Nov 13, 2007 11:48 am
Posts: 189
Location: Belgium
Thanks for sharing your code, it's usefull and gives insight in how barcodes work.
:D
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Akiland
 Post subject: Re: CODE 39 Barcode Genarator
PostPosted: Tue Mar 13, 2012 1:14 am 
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Joined: Tue Jan 04, 2011 3:02 am
Posts: 1236
Location: Jönköping, Sweden
Hi, Awesome job!

Do you think it will support interleaved 2 of 5 barcodes soon? :)

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NaNdummy
 Post subject: Re: CODE 39 Barcode Genarator
PostPosted: Thu Mar 22, 2012 11:35 am 
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Joined: Thu Dec 01, 2011 2:13 pm
Posts: 288
Can I use it for commercial use? I can add you to the credits if you want it.

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kirkgray
 Post subject: Re: CODE 39 Barcode Genarator
PostPosted: Thu Mar 22, 2012 3:16 pm 
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Joined: Mon Dec 26, 2005 1:42 pm
Posts: 326
Perhaps a Select Case statement is in order:

...

for x = 1 to len(barcode)
  
  Select Case mid(barcode, x, 1)
  Case "0"
    newbarcode = newbarcode + "000110100Q"
    
  Case "1"
    newbarcode = newbarcode + "100100001Q"
    
  Case "2"
    newbarcode = newbarcode + "001100001Q"
    
  Case "3"
    newbarcode = newbarcode + "101100000Q"
    
  Case "4"
    newbarcode = newbarcode + "000110001Q"
    
  Case "5"
    newbarcode = newbarcode + "100110000Q"
    
  Case "6"
    newbarcode = newbarcode + "001110000Q"
    
  Case "7"
    newbarcode = newbarcode + "000100101Q"
    
  Case "8"
    newbarcode = newbarcode + "100100100Q"
    
  Case "9"
    newbarcode = newbarcode + "101100000Q"
    
  Case "A"
    newbarcode = newbarcode + "100001001Q"
    
  Case "B"
    newbarcode = newbarcode + "001001001Q"
    
  Case "C"
    newbarcode = newbarcode + "101001000Q"
    
  Case "D"
    newbarcode = newbarcode + "000011001Q"
    
  Case "E"
    newbarcode = newbarcode + "100011000Q"
    
  Case "F"
    newbarcode = newbarcode + "001011000Q"
    
  Case "G"
    newbarcode = newbarcode + "000001101Q"
    
  Case "H"
    newbarcode = newbarcode + "100001100Q"
    
  Case "I"
    newbarcode = newbarcode + "001001100Q"
    
  Case "J"
    newbarcode = newbarcode + "000011100Q"
    
  Case "K"
    newbarcode = newbarcode + "100000011Q"
    
  Case "L"
    newbarcode = newbarcode + "001000011Q"
    
  Case "M"
    newbarcode = newbarcode + "101000010Q"
    
  Case "N"
    newbarcode = newbarcode + "000010011Q"
    
  Case "O"
    newbarcode = newbarcode + "100010010Q"
    
  Case "P"
    newbarcode = newbarcode + "001010010Q"
    
  Case "Q"
    newbarcode = newbarcode + "000000111Q"
    
  Case "R"
    newbarcode = newbarcode + "1000000110"
    
  Case "S"
    newbarcode = newbarcode + "001000110Q"
    
  Case "T"
    newbarcode = newbarcode + "000010110Q"
    
  Case "U"
    newbarcode = newbarcode + "110000001Q"
    
  Case "V"
    newbarcode = newbarcode + "011000001Q"
    
  Case "W"
    newbarcode = newbarcode + "111000000Q"
    
  Case "X"
    newbarcode = newbarcode + "010010001Q"
    
  Case "Y"
    newbarcode = newbarcode + "110010000Q"
    
  Case "Z"
    newbarcode = newbarcode + "011010000Q"
    
  Case "-"
    newbarcode = newbarcode + "010000101Q"
    
  Case "."
    newbarcode = newbarcode + "110000100Q"
    
  Case " "
    newbarcode = newbarcode + "011000100Q" //Space
    
  Case "/"
    newbarcode = newbarcode + "010100010Q"
    
  Case "+"
    newbarcode = newbarcode + "010001010Q"
    
  Case "%"
    newbarcode = newbarcode + "000101010Q"
    
  End Select
  
next x

...
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