VB.NET Code 39 Generator Introduction
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This part talks about the Code 39 barcode. It is a discrete and variable-length barcode type, known as the "Code 3/9", "Code 3 of 9", "USS Code 39", "USD-3", "Alpha39", "Type 39".
Using VB.NET Code 39 Generator to create Code 39 barcodes in VB.NET program is a simple and easy job. VB.NET Code 39 Generator control is easy to install with a single .NET Barcode generation control. It is easy to generate Code 39 barcodes in VB.NET class with detailed VB.NET Code 39 settings document and complete demo for Code 39 generation in VB.NET provided in this article.
Code 39 Generators
OnBarcode provides several Code 39 Generator components and software, including Code 39 .NET, Code 39 Generator, Code 39 Java, Code 39 C#,Code 39 ASP.NET.
Create Code-39 Barcodes in VB.NET
TopCreating Code-39 barcode in VB.NET class example:
Imports OnBarcode.Barcode
Dim barcode As Linear = New Linear
' Code 39 Barcode Basic Settings
barcode.Type = BarcodeType.CODE39
' Code39 Valid data char set:
' 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 (Digits)
' A - Z (Uppercase letters)
' - (Dash), $ (Dollar), % (Percentage), (Space), . (Point), / (Slash), + (Plus)
' Code39 extension Valid data char set:
' All ASCII 128 characters
' Code39 encodes upper case chars only, for lower case chars, use Code 39 extension
barcode.Data = "ONBARCODE"
barcode.AddCheckSum = True
' Set the ProcessTilde property to true, if you want use the tilde character "~"
' to specify special characters in the input data. Default is false.
'
' 1) 1-byte character: ~0dd/~1dd/~2dd (character value from 000 ~ 255);
' ASCII character '~' is presented by ~126;Strings from "~256" to "~299" are unused
barcode.ProcessTilde = False
' Code 39 Wide Narrow bar Ratio
' Valid value is from 2.0 to 3.0 inclusive.
barcode.N = 3.0F
' The space between 2 characters in code 39; This a multiple of X; The default is 1.;
' Valid value is from 1.0 (inclusive) to 5.3 (exclusive)
barcode.I = 1.0F
barcode.ShowStartStopInText = False
' Barcode Size Related Settings
barcode.UOM = UnitOfMeasure.PIXEL
barcode.X = 1
barcode.Y = 80
barcode.LeftMargin = 0
barcode.RightMargin = 0
barcode.TopMargin = 0
barcode.BottomMargin = 0
barcode.Resolution = 96
barcode.Rotate = Rotate.Rotate0
' Barcode Text Settings
barcode.ShowText = True
barcode.TextFont = New Drawing.Font("Arial", 9.0F, Drawing.FontStyle.Regular)
barcode.TextMargin = 6
' Image format setting
barcode.Format = System.Drawing.Imaging.ImageFormat.Gif()
barcode.drawBarcode("c://code-39.gif")
Create Code 39 with barcode options customized in VB.NET WinForms, WPF apps
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Using OnBarcode VB.NET Barcode Generator library, you can apply the following properties to customize the Code 39 bar, space width, start/stop chars display/hide
in Visual Basic .NET application.
Here we will show how to customize the Code 39 barcode image below through properties
ShowStartStopInText: enable to display or hide start/stop chars (*) in the Code 39 barcode textN: Wide bar width vs narrow bar width ratio, 2.0 - 3.0 inclusive, default is 2.I: The space between 2 characters in code 39. This is a multiple of X (narrow bar width).
Here we will show how to customize the Code 39 barcode image below through properties
N and I.
Show / hide Code 39 start/stop chars
You can choose to hide Code 39 start / stop characters (
*) in the barcode text (the start / stop characters will still be encoded into Code 39 barcode symbology) using vb.net.
- Set property
ShowStartStopInTextto false to hide the start/stop chars displayed in the Code 39 barcode human readable text
Dim barcode = New Linear() barcode.Type = BarcodeType.CODE39 barcode.Data = "CODE-39" barcode.ShowStartStopInText = False barcode.drawBarcode("C://Output//vb-net-code39-hide-start-stop-chars.png")
Code 39 Wide bar vs Narrow bar size ratio (N)
Using vb.net barcode generator component api, you can apply the Code 39 wide bar vs narrow bar ratio through property
The property
N
in vb.net console, Windows Forms, WPF desktop applications.
The property
N valid value is from 2 to 3 (both inclusive). The default is 2.
barcode.N = 3
Code 39 Intercharacter space (I)
Using vb.net barcode generator sdk library, you can apply the Code 39 inter characters space size through property
The property
I in VB.NET class.
The property
I is the space between 2 character bar modules, and it is a multiple of X (narrow bar module width). The default value is 1.0f.
barcode.I = 2
Common Asked Questions
What is Code 39 barcode used for?
Code 39, also known as Code 3 of 9, is the first barcode symbology to encode both numbers and letters (Upper case letters only). It is most commonly used in
the inventory, government, military and electronics industries.
Using VB.NET barcode generator library, you can need create and initiate a new
Using VB.NET barcode generator library, you can need create and initiate a new
com.onbarcode.barcode.Code39 object to create Code 39 or Code 39 extension barcodes.
Standard or regular Code 39 barcode encodes upper-case letters only. To encode lower-case letters, you need choose Code 39 extend barcode.
Can Code 39 barcode encode lowercase letters in VB.NET class?
Code 39 barcode standard version does not support lowercase letters encoding.
However the Code 39 extended version does. OnBarcode VB.NET Barcode Generator library does support both Code 39 standard and extend versions.
In VB.NET class
Code39, by default it will create standard Code 39 barcode images.
To create Code 39 extended barcodes using VB.NET, set the methodCode39.setExtension(true) in Visual Basic .NET class library, console, WinForms, WPF windows applications.
What is the minimum size for Code 39 barcode?
Code 39 barcodes need meet the following barcode dimension size requirements.
- Code39.setX() (X): the mimumum bar width (X module) is defined by the application specification.
In VB.NET class, you can create and customize the Code 39 bar/space module width through method
Code39.setX() - Code39.setBarcodeHeight(): the minimum height is 5.0mm or 15% of symbol width (excluding quiet zones), whichever is greater.
Using VB.NET barcode library, you can generate and customize the Code 39 barcode image height through method
Code39.setBarcodeHeight()in VB.NET class
What is the ratio of narrow to wide bars in Code 39 barcode?
The valid ratio of Code 39 narrow to wide bars is from 1:2 to 1:3 inclusive. You can apply the
Code 39 bars ratio configure through method
Code39.setN() using VB.NET barcode generation library.
What is the difference between barcode 39 and barcode 93?
Bath Code 39 and Code 93 are linear (1d) barcode formats.
Code 93 is an updated version of Code 39. Code 93 is a higher-density barcode type compared to Code 39.
Java barcode library supports both Code 39 and Code 93 barcodes generation and printing in Visual Basic .NET class library, console, WinForms, WPF windows applications.
In VB.NET class
Creating a new
In VB.NET class
Code39, by default it will create standard Code 39 barcode images.
To create Code 39 extended barcodes using VB.NET, set the methodCode39.setExtension(true) in Visual Basic .NET class library, console, WinForms, WPF windows applications.
Creating a new
Code93 to encode and print Code 93 barcode images in VB.NET windows or console project.
What is the difference between Code 39 and Code 128 barcodes?
Bath Code 39 and Code 128 are linear (1d) barcode symbologies.
Code 128 requires a compulsory checksum digit. If the Code 128 barcode is damaged, it may still be scannable. Code 39 checksum is optional.
If the Code 39 barcode without checksum is damaged, it won't be scannable.
In VB.NET class, you can generate Code 39 barcode with or without check sum applied using VB.NET Barcode Generator library.
In VB.NET source code, set method
In VB.NET source code, set method
Code39.setAddCheckSum() with true value to append a checksum character to the end of Code 39 barcode.
