VB.NET Code 39 Generator Data Encoding Tutorial

sample source code to input valid data and generate linear Code 39 images in VB.NET

• Code 39 VB.NET Generator Setup
• Data Character Set for Code 39 VB.NET Generator

Draw Code 39 with Numeric Character

Generate Code 39 using Uppercase Letters

Print Code 39 using Punctuations

• Valid Data length for in Code 39 VB.NET Generator

Code 39 Data Length

Digits in Code 39 VB.NET Generator

Code 39, also known as Alpha39, Code 3 of 9, Code 3/9, Type 39, USS Code 39, or USD-3, is the first alpha-numeric linear barcode symbology used world-wide.

OnBarcode.com provides more details about how to set Code 39 barcode size and image in Barcode Generator Control on VB.NET:

• Customizing Code 39 Barcode Image in Visual Basic.NET Project
• Customizing Code 39 Barcode Size in Visual Basic.NET Project

Code 39 VB.NET Generator installation

1. Download the trial package and unzip

2. Copy OnBarcode.Barcode.WinForms.dll to your .NET project folder

3. Do not copy dll to .NET bin directory, .NET build tools will do it for you.

4. Add OnBarcode.Barcode.WinForms.dll to .NET project reference

5. Right click .NET Visual Studio Toolbox, select menu Choose Items...

6. In "Choose Toolbox Items" form, click button "Browse...", and select OnBarcode.Barcode.WinForms.dll

7. After selection, you will find four items under "Components" section: LinearWinForm, DataMatrixWinForm, PDF417WinForm, and QRCodeWinForm

Dim code39 As OnBarcode.Barcode.Linear

code39 = New OnBarcode.Barcode.Linear

code39.Type = OnBarcode.Barcode.BarcodeType.CODE39

There are three code sets of Code 39. They are code set A, code set B, and code set C. Code 39 in different code set encodes different types of data character.

Generate Code 39 with Numeric Character

Code 39 is capable of encoding number 0 to 9.

Sample Usage:

Dim code39 As OnBarcode.Barcode.Linear = New OnBarcode.Barcode.Linear

code39.Type = OnBarcode.Barcode.BarcodeType.CODE39

code39.Data = "123"

Generate Code 39 using Uppercase Letters

Code 39 encodes uppercase letters A-Z.

Sample Usage:

Dim code39 As OnBarcode.Barcode.Linear = New OnBarcode.Barcode.Linear

code39.Type = OnBarcode.Barcode.BarcodeType.CODE39

code39.Data = "ABC"

Make Code 39 using using Punctuations

Code 39 encodes - (Dash),. (Point), $ (Dollar), / (Slash), + (Plus) % (Percentage), and (Space).

Sample Usage:

Dim code39 As OnBarcode.Barcode.Linear = New OnBarcode.Barcode.Linear

code39.Type = OnBarcode.Barcode.BarcodeType.CODE39

code39.Data = "+-"

If you want to use the tilde character "~" to specify special characters in the input data, please set property ProcessTilde to be true.

1-byte character: ~0dd/~1dd/~2dd (character value from 000 ~ 255); ASCII character '~' is presented by ~126 Strings from "~256" to "~299" are unused

2- byte character (Unicode): ~6ddddd (character value from 00000 ~ 65535) Strings from "~665536" to "~699999" are unused

Sample Usage:

code39.ProcessTilde = True

Code 39 Data Length

Code 39 is variable length symbology, which easily encodes data at any length.

Data Length in Code 39 VB.NET Generator

The value of property Data, which is used to define the data in Code 39, is a string value. You can input data at any length in the string.

Sample Usage:

Dim code39 As OnBarcode.Barcode.Linear = New OnBarcode.Barcode.Linear

code39.Type = OnBarcode.Barcode.BarcodeType.CODE39

code39.Data = "1"

Sample Usage:

Dim code39 As OnBarcode.Barcode.Linear = New OnBarcode.Barcode.Linear

code39.Type = OnBarcode.Barcode.BarcodeType.CODE39

code39.Data = "12345678"