C# GS1-128 / EAN-128 Generator Library SDK
Integration & Developer Guide for GS1-128 / EAN-128 linear barcode image generation in C#
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Generate barcode GS1-128 / EAN-128 images in Visual C# .NET with complete sample C# source code

  • Generate, create EAN-128 in Visual C# .NET applications
  • Easy to install & integrate barcode EAN-128 generation library SDK into C# developments
  • Generate over 30 linear, 2d barcode images in C#.NET including C# QR Code, C# Data Matrix, C# EAN, C# UPC, C# PDF-417, C# Code 39, C# Code 128
  • Generate EAN-128 images in C# class library
  • Create barcode EAN-128 in C# ASP.NET web application, webform, webpage
  • Print EAN-128 barcode in C# Windows Form project
  • Draw EAN-128 in SQL Server Reporting Services (SSRS) & Crystal Reports for .NET projects
  • Easy to encode EAN-128 images to jpeg, gif, png, tiff, bitmap files in C# program

C# GS1-128 / EAN-128 Generator Introduction
GS1-128, former known as EAN-128, UCC-128, USS-128, is alphanumeric linear barcode developed on Code 128, however, using GS1 standard.

C# GS1-128 Generator is one of the functions in OnBarcode's Barcode in .NET Generation Controls, which supports generating & printing GS1-128 / EAN-128 and 20+ other linear & 2D bar codes for C# applications.
OnBarcode C# Barcode Generator makes it easy to generate, create GS1-128 and other linear & 2d barcodes in Microsoft Word. Here are some detailed tutorials for C# GS1-128 generation and data encoding, size & image setting.

EAN-128 Generator library, SDK & application

OnBarcode provides several EAN-128 Generator components and software, including GS1 128 .NET, GS1 128 Java, GS1 128 VB.NET, GS1 128 ASP.NET, GS1 128 Generator.
This document is providing a detailed C# source code about generating GS1-128 barcodes in C# class using Barcode in C# generation component. Complete GS1-128 custmoization settings is included in C# GS1-128 generation guide.

GS1-128 data encoding using C#

  • The GS1 system requires that only the subset of ISO/IEC 646 International Reference Version defined in these GS1 General Specifications be used for GS1 Application Identifier (AI) element strings.

  • Characters with ASCII values 128 to 255 may also be encoded in Code 128 symbols.

  • Four non-data function characters

  • Four code set selection characters

  • Three start characters

Note: using .NET Barcode Generator SDK, you need provide AI elements data only, the software will add all other characters for you.

GS1 128 barcode property settings in C#
Category Properties Value Comments
Basic Property: Data
Type: string
Default: "12345"
Barcode value to encode.

GS1-128/EAN-128 Valid Data Char Set:
  • all 128 ASCII characters (Char from 0 to 127)

Property: Type
Type: BarcodeType
Default: CODE128 (7)
Linear barcode symbology type.

Set the value to BarcodeType.EAN128.

EAN128 type value is BarcodeType.EAN128 (11).
Property: AddCheckSum
Type: bool
Default: false
AddCheckSum property is not applied here.
GS1 128
EAN 128
Property: ProcessTilde
Type: bool
Default: false
Set the ProcessTilde property to true, if you want use the tilde character "~" to specify special characters in the input data.

  • 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
  • for GS1 AI Code:
    ~ai2: AI code with 2 digits
    ~ai3: AI code with 3 digits
    ~ai4: AI code with 4 digits
    ~ai5: AI code with 5 digits
    ~ai6: AI code with 6 digits
    ~ai7: AI code with 7 digits
Property: AutoResize
Type: bool
Default: false
Auto resize the generated barcode image.
Property: BarAlignment
Type: int
Default: 1 (center)
Barcode horizontal alignment inside the image. 0: left, 1: center, 2: right.
Property: UOM
Type: UnitOfMeasure
Default: PIXEL (0)
Unit of meature for all size related settings in the library.

Valid values:
  • UnitOfMeasure.PIXEL (0)
  • UnitOfMeasure.CM (1)
  • UnitOfMeasure.INCH (2)
Property: X
Type: float
Default: 1
Width of barcode bar module (narrow bar), default is 1 pixel.
Property: Y
Type: float
Default: 60
Height of barcode bar module, default is 60 pixel.
Property: BarcodeWidth
Type: float
Default: 0
Barcode image width.

If barcodeWidth setting is smaller than the barcode required minimum width, the library will automatically reset to barcode minimum width.
Property: BarcodeHeight
Type: float
Default: 0
Barcode image height.

If barcodeHeight setting is smaller than the barcode required minimum height, the library will automatically reset to barcode minimum height.
Property: LeftMargin
Type: float
Default: 0
Barcode image left margin size.
Property: RightMargin
Type: float
Default: 0
Barcode image right margin size.
Property: TopMargin
Type: float
Default: 0
Barcode image top margin size.
Property: BottomMargin
Type: float
Default: 0
Barcode image bottom margin size.
Property: Resolution
Type: int
Default: 72
Barcode image resolution in DPI (Dots per inch).
Property: Rotate
Type: Rotate
Default: Rotate0 (0)
Valid values:

  • Rotate.Rotate0 (0)
  • Rotate.Rotate90 (1)
  • Rotate.Rotate180 (2)
  • Rotate.Rotate270 (3)
Property: BackColor
Type: Color
Default: white
Barcode image background color.
Property: ForeColor
Type: Color
Default: black
Barcode image foreground color.
Property: ShowText
Type: bool
Default: true
If true, display barcode data text under the barcode, otherwise do not display.
Property: TextFont
Type: Font
new Font("Arial", 9f, FontStyle.Regular)
Barcode text font style.

In ASP.NET web streaming, using the url paramter in the following format:
Property: TextMargin
Type: float
Default: 6
Space between barcode and barcode data text, default is 6 pixel.
Property: TextColor
Type: Color
Default: black
Barcode text color.
Property: Format
Type: ImageFormat
Default: Png
Barcode image encoding type.
// generate barcode and encode to image file
public void drawBarcode(string filename)

// generate barcode and paint on Graphics object
public void drawBarcode(Graphics graphics)

// generate barcode and paint on Bitmap object
public Bitmap drawBarcode()

// generate barcode and paint on Stream object
public void drawBarcode(Stream fileStream)

// generate barcode and paint on byte[] object
public byte[] drawBarcodeAsBytes()
In WebStream query string, please use int value for Enums, "true" and "false" for bool.

Create GS1-128 / EAN-128 Barcodes in C#

Creating GS1-128 / EAN-128 barcode in C# class example:

            Linear barcode = new Linear();

            // encode two AI element
            barcode.Data = "(00)395123451234567895(01)09501101530003";
            // Barcode symbology type.
            barcode.Type = BarcodeType.EAN128;

            * Barcode Image Related Settings
            // Unit of meature for all size related setting in the library. 
            barcode.UOM = UnitOfMeasure.PIXEL;
            // Bar module width (X), default is 1 pixel;
            barcode.X = 2;
            // Bar module height (Y), default is 60 pixel;
            barcode.Y = 60;
            // Barcode image left, right, top, bottom margins. Defaults are 0.
            barcode.LeftMargin = 0;
            barcode.RightMargin = 0;
            barcode.TopMargin = 0;
            barcode.BottomMargin = 0;
            // Image resolution in dpi, default is 72 dpi.
            barcode.Resolution = 72;
            // Created barcode orientation.
            //4 options are: facing left, facing right, facing bottom, and facing top
            barcode.Rotate = Rotate.Rotate0;

            * Linear barcodes human readable text styles
            // Display human readable text under the barcode
            barcode.ShowText = true;
            // Human readable text font size, font family and style
            barcode.TextFont = new Font("Arial", 9f, FontStyle.Regular);
            // Space between barcode and text. Default is 6 pixel.
            barcode.TextMargin = 6;

            // Generate Code-128 and encode barcode to png format
            barcode.Format = System.Drawing.Imaging.ImageFormat.Png;


More C# Barcode Generation Tutorials for Each Barcode

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