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Using Free C# Souce Code to Generate GS1 Barcode Labels for ASP.NET Web Application & Windows Applications
The following guide will help you how to read GS1 data message from GS1 supported barcode using C#. Parse the extracted GS1 data message with control characters into list of
GS1 Application Identifier (AI Code) and a GS1 Application Identifier data field.
After this tutorial, you will be albe to
How to read, parse GS1 data elements from barcode images using C#?
About GS1 data message Top
A GS1 data message contains a group data elements. Each element string is the combination of a GS1 Application Identifier (AI Code) and a GS1 Application Identifier data field (AI Data). The AI Code is a two to four digits number.
The GS1 data message could be encoded in independent of data carrier, such as barcode, RFID (radio frequency identification), and business message. A GS1 barcode contains a group of data elements with several special characters (such as FNC1) The GS1 barcode complete data includes list pairs of AI code and data, and some control characters, such as "FNC1". The FNC1 is a non-printable control character used to delimit GS1 element strings of variable length. How to read GS1 data from barcodes using C#Top
In the following C# example, we will use a sample GS1 data "(01)09012345678901(17)240915(10)abc123(3930)978112". The sample GS1 data includes
FOUR elements with four application identifier (AI Code): "01", "17", "10", "3930".
We have encoded the above GS1 data into GS1-128, QR Code and Data Matrix barcodes using OnBarcode C# Barcode Generator library. GS1-128 
QR Code 
Data Matrix 
Now you can use our C# barcode reader library to scan, read the above barcodes. Here is the C# sample source code to read GS1-128 barcodes. string inputFilePath = "W://Projects//Test-Input//gs1-sample-data-gs1-128.png"; // Scan barcodes from the input image file. BarcodeDetail[] result = BarcodeScanner.ScanInDetails(inputFilePath, BarcodeType.Code128); foreach (BarcodeDetail b in result) { // Indicate if the barcode is conform to GS1 specification. if (b.IsGS1Compitable) { // Get message in string format. // Eg. "(415)5412345678908(3911)710125" String msg = b.GetMessage(); Console.WriteLine("Data: '{0}'", b.Data); Console.WriteLine("Message: {0}", msg); // Retrieve each AI and its data from the message. // Eg. // AI: 415 // Data: 5412345678908 // AI: 3911 // Data: 710125 String[] vals = msg.Split(new char[] { '(', ')' }, StringSplitOptions.RemoveEmptyEntries); for (int i = 0; i < vals.Length; i += 2) { Console.WriteLine("AI: {0}", vals[i]); Console.WriteLine("Data: {0}", vals[i + 1]); } } } Output in the console window: Data: '01090123456789011724091510abc1233930978112' Message: (01)09012345678901(17)240915(10)abc123(3930)978112 AI: 01 Data: 09012345678901 AI: 17 Data: 240915 AI: 10 Data: abc123 AI: 3930 Data: 978112 In the data message, there are two characters are special characters (non-printable), which are defined by GS1. In the class BarcodeDetail, we have provided a useful method GetMessage(). The message will automatically parse the scanned data message into GS1 data elements. ConclusionUsing OnBarcode C# barcode reader library, you do not need parse the control characters inside the GS1 barcode data message. Call barcode reader library, you can get the GS1 barcode all elements directly. |
