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MicroPDF417BarcodeData Class

Contains the data for a single MicroPDF417 barcode.
public class MicroPDF417BarcodeData : BarcodeData 
@interface LTMicroPDF417BarcodeData : LTBarcodeData<NSCopying> 
public class MicroPDF417BarcodeData extends BarcodeData 
public ref class MicroPDF417BarcodeData : public BarcodeData, System.ICloneable   
class MicroPDF417BarcodeData(BarcodeData): 

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 casted down to the base BarcodeData class.

You can 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 accepts 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:

  • DataCode - The MicroPDF417 barcode function code word for Code 128 emulation

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; 

This example writes a couple of MicroPDF417 barcode with different options to an image and then reads them back.

using Leadtools; 
using Leadtools.Codecs; 
using Leadtools.Barcode; 
using Leadtools.ImageProcessing; 
public void MicroPDF417Barcode_Example() 
   string imageFileName = Path.Combine(LEAD_VARS.ImagesDir, "MyMicroPDF417Barcodes.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 MicroPDF417 barcodes 
      WriteBarcode(engine.Writer, image, "DATA1", MicroPDF417BarcodeSymbolSize.Smallest, true); 
      WriteBarcode(engine.Writer, image, "DATA2", MicroPDF417BarcodeSymbolSize.Size44X4, 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, MicroPDF417BarcodeSymbolSize symbolSize, bool topLeft) 
   // Create the barcode data 
   MicroPDF417BarcodeData barcode = new MicroPDF417BarcodeData(); 
   barcode.Value = value; 
   barcode.DataCode = 0; 
   barcode.Symbology = BarcodeSymbology.MicroPDF417; 
   // 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 
   MicroPDF417BarcodeWriteOptions options = new MicroPDF417BarcodeWriteOptions(); 
   if (topLeft) 
      options.HorizontalAlignment = BarcodeAlignment.Near; 
      options.VerticalAlignment = BarcodeAlignment.Near; 
      options.HorizontalAlignment = BarcodeAlignment.Far; 
      options.VerticalAlignment = BarcodeAlignment.Far; 
   options.UseMode128Emulation = false; 
   options.IsLinked = false; 
   options.EnableGroupMode = false; 
   options.XModule = 30; 
   options.XModuleAspectRatio = 3; 
   options.LimitByRowsAndColumns = true; 
   options.SymbolSize = symbolSize; 
   // Write it 
   Console.WriteLine("Writing barcode with symbol size: {0} and Data: {1}", symbolSize, value); 
   writer.WriteBarcode(image, barcode, options); 
private void ReadBarcodes(BarcodeReader reader, RasterImage image) 
   // Setup read options 
   MicroPDF417BarcodeReadOptions options = new MicroPDF417BarcodeReadOptions(); 
   options.SearchDirection = BarcodeSearchDirection.Horizontal; 
   options.EnableDoublePass = false; 
   options.ReadMode = MicroPDF417BarcodeReadMode.Mode0; 
   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.EnablePreprocessing = true; 
   Console.WriteLine("Reading Barcodes"); 
   BarcodeData[] barcodes = reader.ReadBarcodes(image, LeadRect.Empty, 0, new BarcodeSymbology[] { BarcodeSymbology.MicroPDF417 }, new BarcodeReadOptions[] { options }); 
   Console.WriteLine("{0} barcodes found:", barcodes.Length); 
   foreach (MicroPDF417BarcodeData 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:\LEADTOOLS22\Resources\Images"; 

Target Platforms

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© 1991-2023 LEAD Technologies, Inc. All Rights Reserved.