PDF417 and MacroPDF417 Barcode
Create a PDF417 Barcode
Data File 417, is a two-dimensional stacked barcode symbology capable of encoding over a kilobyte of data per label. It was developed by Symbol Technologies (1989-1992) and is currently maintained by ANSI/AIM USA. To create a PDF417 barcode please follow the steps given below.
- Instantiate a BarcodeGenerator
- Set up its EncodeTypes property to be PDF417
- Set CodeText property for the data you want to encode
PDF417 Error correction level
PDF417 barcode with error correction can withstand certain kind of damage. BarcodeGenerator with a higher error correction level will produce a bigger image, here is a sample with maximum error correction levels:
Aspose.BarCode supports a truncated PDF417 version which omits the right-hand side quiet zone in order to save space. Setting Pdf417Truncate property to true will lead to a comparatively smaller image.
Rows and columns
Rows and columns settings are aiming at general two-dimensional barcodes, applicable to PDF417. A PDF417 barcode consists of black and white rectangular modules. If Rows and Columns settings are illegal, the encoder will simply ignore those settings. Setting Rows and Columns to be zero means no Rows and Columns settings. The following sample pictures are PDF417 barcodes with the same CodeText but of different Rows and Columns settings:
|Different Rows and Columns settings|
PDF417 Compaction Mode
Setting Pdf417CompactionMode property will set the corresponding compaction mode. The given below modes can be set using Aspose.BarCode: Auto: Automatically detect compaction mode
- Text: Text compaction, suitable for text data
- Numeric: Numeric compaction mode, suitable for numeric data
- Binary: Binary compaction mode, suitable for binary data Below code snippet generates a PDF417 barcode using the Text compaction mode:
Please note that the barcode size is bigger because we applied Binary compaction mode to encode text data. You may set the Compaction mode to Auto for choosing the best possible compaction mode or choose carefully based on the type of CodeText value.
Generate Multiple MacroPDF417 Barcodes for Large or Multiple CodeText Values
Multiple MacroPDF417 barcodes can be generated if we either have multiple CodeText values or a very large CodeText value. In the case of a large CodeText value, we may break the large value into multiple smaller CodeText values and generate multiple MacroPDF417 barcodes for these. Each generated barcode maintains the File ID and Segment ID so that these could be recognized as incorrect series. The last segment flag is also set in the last barcode. The following code snippet shows you how to generate four MacroPDF417 barcodes for 4 different CodeText values.