PDF417BarcodeData Class

Summary

Contains the data for a single PDF417 barcode.

Syntax

Objective-C

C++/CLI

Java

Python

[SerializableAttribute()] 
public class PDF417BarcodeData : BarcodeData

@interface LTPDF417BarcodeData : LTBarcodeData<NSCopying>

public class PDF417BarcodeData extends BarcodeData

[TypeConverterAttribute()] 
[SerializableAttribute()] 
public ref class PDF417BarcodeData : public BarcodeData, System.ICloneable

class PDF417BarcodeData(BarcodeData):

Remarks

The MicroPDF417BarcodeData class derives from the base BarcodeData to add specific data that can be read or written when using MicroPDF417 barcodes.

Reading Barcodes

When the BarcodeReader object detects and reads a MicroPDF417 ( BarcodeSymbology.MicroPDF417), the BarcodeReader.ReadBarcode and BarcodeReader.ReadBarcodes methods will return the MicroPDF417BarcodeData object for each barcode cast down to the base BarcodeData class.

Perform standard .NET casting to get the object as MicroPDF417BarcodeData and then examine the extra data properties associated with it.

In addition to all the data members returned as usual in the base BarcodeData object, this class adds the following members:

DataCode - The MicroPDF417 barcode function code word for Code 128 emulation.
IsLinked - Indicates that the MicroPDF417 barcode is linked to a linear symbol printed below it.

In addition to the members above, other MicroPDF417 read options not related to the barcode data can be set using the MicroPDF417BarcodeReadOptions class.

Writing Barcodes

The BarcodeWriter class contains the WriteBarcode method that is used to write a barcode to an image. This method accept the data parameter as the base BarcodeData object. To write a MicroPDF417 barcode, create an instance of MicroPDF417BarcodeData and fill the required parameters then pass this object as the data parameter to WriteBarcode.

In addition to all the data members that must be set as usual in the base BarcodeData object, you must also specify the following members:

Group - The group number if this PDF417 barcode symbol is a member of a group of symbols

In addition to the members above, other MicroPDF417 write options not related to the barcode data can be set using the MicroPDF417BarcodeWriteOptions class.

Use the static (or Shared in VB) BarcodeData.CreateDefaultBarcodeData method to create a new instance of MicroPDF417BarcodeData that contains default parameters ready for writing to an image:

vb[VB Snippet] 
Dim microPDF417Data As MicroPDF417BarcodeData = DirectCast(BarcodeData.CreateDefaultBarcodeData(BarcodeSymbology.MicroPDF417), MicroPDF417BarcodeData)

C# Snippet

MicroPDF417BarcodeData microPDF417Data = BarcodeData.CreateDefaultBarcodeData(BarcodeSymbology.MicroPDF417) as MicroPDF417BarcodeData;

Example

This example writes a couple of PDF417 barcode with different options to an image and then reads them back.

Java

using Leadtools; 
using Leadtools.Codecs; 
using Leadtools.Barcode; 
using Leadtools.ImageProcessing; 
 
 
public void PDF417Barcode_Example() 
{ 
   string imageFileName = Path.Combine(LEAD_VARS.ImagesDir, "MyPDF417Barcodes.tif"); 
 
   BarcodeEngine engine = new BarcodeEngine(); 
 
   // Create the image to write the barcodes to 
   int resolution = 300; 
   using (RasterImage image = RasterImage.Create((int)(8.5 * resolution), (int)(11.0 * resolution), 1, resolution, RasterColor.FromKnownColor(RasterKnownColor.White))) 
   { 
      // Write two PDF417 barcodes 
      WriteBarcode(engine.Writer, image, "DATA1", 10, 10, true); 
      WriteBarcode(engine.Writer, image, "DATA2", 20, 20, false); 
 
      // Save the image 
      using (RasterCodecs codecs = new RasterCodecs()) 
      { 
         codecs.Save(image, imageFileName, RasterImageFormat.CcittGroup4, 1); 
      } 
   } 
 
   // Now read the barcodes again 
   using (RasterCodecs codecs = new RasterCodecs()) 
   { 
      using (RasterImage image = codecs.Load(imageFileName)) 
      { 
         ReadBarcodes(engine.Reader, image); 
      } 
   } 
} 
 
private void WriteBarcode(BarcodeWriter writer, RasterImage image, string value, int rows, int columns, bool topLeft) 
{ 
   // Create the barcode data 
   PDF417BarcodeData barcode = new PDF417BarcodeData(); 
   barcode.Value = value; 
   barcode.Group = 0; 
   barcode.Symbology = BarcodeSymbology.PDF417; 
 
   // We will use the alignment to position the barcodes, so use all of the image 
   barcode.Bounds = new LeadRect(0, 0, image.ImageWidth, image.ImageHeight); 
 
   // Set the write options 
   PDF417BarcodeWriteOptions options = new PDF417BarcodeWriteOptions(); 
 
   if (topLeft) 
   { 
      options.HorizontalAlignment = BarcodeAlignment.Near; 
      options.VerticalAlignment = BarcodeAlignment.Near; 
   } 
   else 
   { 
      options.HorizontalAlignment = BarcodeAlignment.Far; 
      options.VerticalAlignment = BarcodeAlignment.Far; 
   } 
 
   options.Truncated = false; 
   options.EnableGroupMode = false; 
   options.SymbolWidthAspectRatio = 2; 
   options.SymbolHeightAspectRatio = 1; 
   options.LimitByRowsAndColumns = true; 
   options.Rows = rows; 
   options.Columns = columns; 
   options.XModule = 30; 
   options.XModuleAspectRatio = 3; 
   options.ECCLevel = PDF417BarcodeECCLevel.Level0; 
   options.ECCPercentage = 0; 
 
   // Write it 
   Console.WriteLine("Writing barcode with symbol rows/columns: {0}/{1} and Data: {2}", rows, columns, value); 
   writer.WriteBarcode(image, barcode, options); 
} 
 
private void ReadBarcodes(BarcodeReader reader, RasterImage image) 
{ 
   // Setup read options 
   PDF417BarcodeReadOptions options = new PDF417BarcodeReadOptions(); 
   options.SearchDirection = BarcodeSearchDirection.Horizontal; 
   options.EnableDoublePass = false; 
   options.EnableFastMode = false; 
   options.ReadMode = PDF417BarcodeReadMode.Mode0; 
   options.ReturnCorruptedSymbolArea = false; 
   options.ReadOptionalMacroFileNameField = false; 
   options.ReadOptionalMacroSegmentCountField = false; 
   options.ReadOptionalMacroTimestampField = false; 
   options.ReadOptionalMacroSenderField = false; 
   options.ReadOptionalMacroAddresseeField = false; 
   options.ReadOptionalMacroFileSizeField = false; 
   options.ReadOptionalMacroChecksumField = false; 
   options.ReadOptionalMacro79AndAZField = false; 
   options.EnableDoublePassIfSuccess = true; 
   options.EnableNoIndicatorTrail = true; 
   options.EnablePreprocessing = true; 
 
   Console.WriteLine("Reading Barcodes"); 
   BarcodeData[] barcodes = reader.ReadBarcodes(image, LeadRect.Empty, 0, new BarcodeSymbology[] { BarcodeSymbology.PDF417 }, new BarcodeReadOptions[] { options }); 
   Console.WriteLine("{0} barcodes found:", barcodes.Length); 
   foreach (PDF417BarcodeData barcode in barcodes) 
   { 
      Console.WriteLine(" At {0} data: {1} and symbology: {2}", barcode.Bounds, barcode.Value, barcode.Symbology); 
   } 
} 
 
static class LEAD_VARS 
{ 
   public const string ImagesDir = @"C:\LEADTOOLS23\Resources\Images"; 
}

 
import static org.junit.Assert.assertTrue; 
 
import java.io.File; 
import java.io.IOException; 
 
import org.junit.*; 
import org.junit.runner.JUnitCore; 
import org.junit.runner.Result; 
import org.junit.runner.notification.Failure; 
 
import leadtools.*; 
import leadtools.barcode.*; 
import leadtools.codecs.*; 
 
 
public void pdf417Barcode_Example() { 
    final String LEAD_VARS_IMAGES_DIR = "C:\\LEADTOOLS23\\Resources\\Images"; 
    String imageFileName = combine(LEAD_VARS_IMAGES_DIR, "MyPDF417Barcodes.tif"); 
    BarcodeEngine engine = new BarcodeEngine(); 
 
    // Create the image to write the barcodes to 
    int resolution = 300; 
    RasterImage image = RasterImage.create((int) (8.5 * resolution), (int) (11.0 * resolution), 1, resolution, 
            RasterColor.fromKnownColor(RasterKnownColor.WHITE)); 
 
    // Write two PDF417 barcodes 
    writeBarcode(engine.getWriter(), image, "DATA1", 10, 10, true); 
    writeBarcode(engine.getWriter(), image, "DATA2", 20, 20, false); 
 
    // Save the image 
    RasterCodecs codecs = new RasterCodecs(); 
    codecs.save(image, imageFileName, RasterImageFormat.CCITT_GROUP4, 1); 
 
    assertTrue("image unsuccessfully saved", new File(imageFileName).exists()); 
    System.out.println("Command run and image saved to " + imageFileName); 
 
    // Now read the barcodes again 
    image = codecs.load(imageFileName); 
    readBarcodes(engine.getReader(), image); 
    image.dispose(); 
    codecs.dispose(); 
} 
 
// Create the barcode data 
private void writeBarcode(BarcodeWriter writer, RasterImage image, String value, int rows, int columns, boolean topLeft) { 
    PDF417BarcodeData barcode = new PDF417BarcodeData(); 
    barcode.setValue(value); 
    barcode.setGroup(0); 
    barcode.setSymbology(BarcodeSymbology.PDF417); 
 
    // We will use the alignment to position the barcodes, so use all of the image 
    barcode.setBounds(new LeadRect(0, 0, image.getImageWidth(), image.getImageHeight())); 
 
    // Set the write options 
    PDF417BarcodeWriteOptions options = new PDF417BarcodeWriteOptions(); 
 
    if (topLeft) { 
        options.setHorizontalAlignment(BarcodeAlignment.NEAR); 
        options.setVerticalAlignment(BarcodeAlignment.NEAR); 
    } else { 
        options.setHorizontalAlignment(BarcodeAlignment.FAR); 
        options.setVerticalAlignment(BarcodeAlignment.FAR); 
    } 
 
    options.setTruncated(false); 
    options.setEnableGroupMode(false); 
    options.setSymbolWidthAspectRatio(2); 
    options.setSymbolHeightAspectRatio(1); 
    options.setLimitByRowsAndColumns(true); 
    options.setRows(rows); 
    options.setColumns(columns); 
    options.setXModule(30); 
    options.setXModuleAspectRatio(3); 
    options.setECCLevel(PDF417BarcodeECCLevel.LEVEL0); 
    options.setECCPercentage(0); 
 
    // Write it 
    System.out.printf("Writing barcode with symbol rows/columns: %1s/%2s and Data: %3s%n", rows, columns, value); 
    writer.writeBarcode(image, barcode, options); 
} 
 
// Setup read options 
private void readBarcodes(BarcodeReader reader, RasterImage image) { 
    PDF417BarcodeReadOptions options = new PDF417BarcodeReadOptions(); 
    options.setSearchDirection(BarcodeSearchDirection.HORIZONTAL); 
    options.setEnableDoublePass(false); 
    options.setEnableFastMode(false); 
    options.setReadMode(PDF417BarcodeReadMode.MODE0); 
    options.setReturnCorruptedSymbolArea(false); 
    options.setReadOptionalMacroFileNameField(false); 
    options.setReadOptionalMacroSegmentCountField(false); 
    options.setReadOptionalMacroTimestampField(false); 
    options.setReadOptionalMacroSenderField(false); 
    options.setReadOptionalMacroAddresseeField(false); 
    options.setReadOptionalMacroFileSizeField(false); 
    options.setReadOptionalMacroChecksumField(false); 
    options.setReadOptionalMacro79AndAZField(false); 
    options.setEnableDoublePassIfSuccess(true); 
    options.setEnablePreprocessing(true); 
 
    System.out.println("Reading Barcodes"); 
    BarcodeData[] barcodes = reader.readBarcodes(image, LeadRect.getEmpty(), 0, 
            new BarcodeSymbology[] { BarcodeSymbology.PDF417 }, new BarcodeReadOptions[] { options }); 
    System.out.printf("%s barcodes found:%n", barcodes.length); 
    for (BarcodeData barcode : barcodes) { 
        System.out.printf(" At %1s data: %2s and symbology: %3s", barcode.getBounds(), barcode.getValue(), 
                barcode.getSymbology()); 
    } 
} 
 
public static String combine(String path1, String path2) { 
    File file = new File(path1, path2); 
    return file.getPath(); 
}

Requirements

Target Platforms

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Help Version 23.0.2024.2.29

Leadtools.Barcode Assembly

Introduction

Getting Started

Namespaces

Leadtools.Barcode Namespace

Assemblies

PDF417BarcodeData Class

Reading Barcodes

Writing Barcodes

Reference