Codablock-F Barcodes


Codablock-F is a multiple-row stacked symbology that allows generating barcodes composed of several Code128 barcode labels. Using this symbology, it is possible to encode up to 2,725 characters setting the required number rows (from 2 to 44) so that each of them can contain from 4 to 62 digits. Codablock-F has two main advantages over basic Code128. First, it allows utilizing horizontal and vertical space more efficiently owing to flexible settings of barcode layout (the number of rows and columns). Second, it provides two check digits (based on the modulo 86 algorithm) for an entire message encoded in a Codablock-F barcode in addition to obligatory checksums that are calculated for each row composed of Code128 barcodes. Moreover, Codablock-F can be read by laser scanners.

Barcode Height Settings

In Aspose.BarCode for .NET, developers can set the height of each row in a stacked barcode by initializing the AspectRatio property of class CodablockParameters. This parameter is defined as a relative coefficient to the value of the XDimension property. It is recommended to set the value of AspectRatio greater than 10.

Barcode labels demonstrated below have been generated with different aspect ratio settings.

Aspect Ratio

Is Set to 15

Is Set to 30

The following code snippet explains how to adjust the height of Codablock-F barcodes by setting the aspect ratio.

BarcodeGenerator gen = new BarcodeGenerator(EncodeTypes.CodablockF, "Aspose");
gen.Parameters.Barcode.XDimension.Pixels = 2;
//set CodablockF aspect ratio 15
gen.Parameters.Barcode.Codablock.AspectRatio = 15;
gen.Save($"{path}CodablockFAspectRatio15.png", BarCodeImageFormat.Png);
//set CodablockF aspect ratio 30
gen.Parameters.Barcode.Codablock.AspectRatio = 30;
gen.Save($"{path}CodablockFAspectRatio30.png", BarCodeImageFormat.Png);

Layout Settings

To set the layout of Codablock-F barcodes by defining the number of rows and columns, it is necessary to initialize the Columns and Rows properties of class CodablockParameters where the former is the most significant parameter. The maximal values of these properties are limited to 62 and 44 for Columns and Rows, respectively.

Barcode images provided below have been generated with different layout settings.

Layout Settings

4 Columns

4 Rows

6 Rows and 4 Columns

The following code sample illustrates how to customize layout settings for Codablock-F barcodes.

BarcodeGenerator gen = new BarcodeGenerator(EncodeTypes.CodablockF, "Aspose.Barcode");
gen.Parameters.Barcode.XDimension.Pixels = 2;
//set CodablockF columns 4
gen.Parameters.Barcode.Codablock.Columns = 4;
gen.Parameters.Barcode.Codablock.Rows = 0;
gen.Save($"{path}CodablockFCol4.png", BarCodeImageFormat.Png);
//set CodablockF rows 4
gen.Parameters.Barcode.Codablock.Columns = 0;
gen.Parameters.Barcode.Codablock.Rows = 4;
gen.Save($"{path}CodablockFRow4.png", BarCodeImageFormat.Png);
//set CodablockF columns 4 rows 6
gen.Parameters.Barcode.Codablock.Columns = 4;
gen.Parameters.Barcode.Codablock.Rows = 6;
gen.Save($"{path}CodablockFRow6Col4.png", BarCodeImageFormat.Png);