VB.NET Code 128 Generator Data Encoding Tutorial
sample source code to input valid data and generate linear Code 128 images in VB.NET
Setup Code 128 VB.NET Generator
Code 128, also known as ANSI/AIM 128, ANSI/AIM Code 128, USS Code 128, Uniform Symbology Specification Code 128, is a very capable linear barcode of excellent density, high reliability.
How to generate, print barcode using .NET, Java sdk library control with example project source code free download:
OnBarcode.com also provides more details about how to set Code 128 barcode size and image in Barcode Generator Control on VB.NET:
Code 128 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
After, get it ready in VB.NET by placing the following statement where Code 128 VB.NET Generator is needed:
Dim code128 As OnBarcode.Barcode.Linear
code128 = New OnBarcode.Barcode.Linear
code128.Type = OnBarcode.Barcode.BarcodeType.CODE128
Select Data for Code 128 VB.NET Generator
There are three code sets of Code 128. They are code set A, code set B, and code set C. Code 128 in different code set encodes different types of data character.
Generate Code 128 using Code Set A
Code 128 in code set A encodes 0-9, A-Z, control code, special characters, FNC1, FNC2, FNC3, and FNC4.
Sample Usage:
Dim code128 As OnBarcode.Barcode.Linear = New OnBarcode.Barcode.Linear
code128.Type = OnBarcode.Barcode.BarcodeType.CODE128A
code128.Data = "1A"
Create Code 128 using Code Set B
Code 128 in code set B is to encode 0-9, A-Z, a-z, special characters, FNC1, FNC2, FNC3, and FNC4.
Sample Usage:
Dim code128 As OnBarcode.Barcode.Linear = New OnBarcode.Barcode.Linear
code128.Type = OnBarcode.Barcode.BarcodeType.CODE128B
code128.Data = "1Aa"
Print Code 128 using Code Set C
Code 128 in code set C is only used for 00-99 and FNC1 encoding.
Sample Usage:
Dim code128 As OnBarcode.Barcode.Linear = New OnBarcode.Barcode.Linear
code128.Type = OnBarcode.Barcode.BarcodeType.CODE128C
code128.Data = "10"
Make Code 128 using Auto Code Set
Code 128 VB.NET Generator build up a brand-new code set- code set auto, to make the Code 128 data encoding simpler.
Sample Usage:
Dim code128 As OnBarcode.Barcode.Linear = New OnBarcode.Barcode.Linear
code128.Type = OnBarcode.Barcode.BarcodeType.CODE128
Using code set auto of Code 128 VB.NET Generator, the shifting between code sets could be done automatically.
Process Tilde in Code 128
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:
code128.ProcessTilde = True
Valid length for Data in Code 128 VB.NET Generator
Code 128 Data Length
Code 128 is variable length symbology, which easily encodes data at any length.
Data Length in Code 128 VB.NET Generator
The value of property Data, which is used to define the data in Code 128, is a string value. You can input data at any length in the string.
Sample Usage:
Dim code128 As OnBarcode.Barcode.Linear = New OnBarcode.Barcode.Linear
code128.Type = OnBarcode.Barcode.BarcodeType.CODE128
code128.Data = "1"
Sample Usage:
Dim code128 As OnBarcode.Barcode.Linear = New OnBarcode.Barcode.Linear
code128.Type = OnBarcode.Barcode.BarcodeType.CODE128
code128.Data = "12345678"