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MicroPDF417BarcodeData Class

Summary
Contains the data for a single MicroPDF417 barcode.
Syntax
C#
VB
Objective-C
C++
Java
[SerializableAttribute()] 
public class MicroPDF417BarcodeData : BarcodeData 
<TypeConverterAttribute()> 
<SerializableAttribute()> 
Public Class MicroPDF417BarcodeData  
   Inherits BarcodeData 
   Implements System.ICloneable  
@interface LTMicroPDF417BarcodeData : LTBarcodeData <NSCopying> 
public class MicroPDF417BarcodeData extends BarcodeData 
[TypeConverterAttribute()] 
[SerializableAttribute()] 
public ref class MicroPDF417BarcodeData : public BarcodeData, System.ICloneable
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 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 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 MicroPDF417 barcode with different options to an image and then reads them back.

C#
VB
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; 
 
	// 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; 
	} 
	else 
	{ 
		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; 
 
	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} and data: {1}", barcode.Bounds, barcode.Value); 
	} 
} 
 
static class LEAD_VARS 
{ 
   public const string ImagesDir = @"C:\LEADTOOLS21\Resources\Images"; 
} 
Imports Leadtools 
Imports Leadtools.Codecs 
Imports Leadtools.Barcode 
Imports Leadtools.ImageProcessing 
 
Public Sub MicroPDF417Barcode_Example() 
   Dim imageFileName As String = Path.Combine(LEAD_VARS.ImagesDir, "MyMicroPDF417Barcodes.tif") 
 
   Dim engine As New BarcodeEngine() 
 
   ' Create the image to write the barcodes to 
   Dim resolution As Integer = 300 
   Using image As RasterImage = RasterImage.Create(CType(8.5 * resolution, Integer), CType(11.0 * resolution, Integer), 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 codecs As New RasterCodecs() 
         codecs.Save(image, imageFileName, RasterImageFormat.CcittGroup4, 1) 
      End Using 
   End Using 
 
   ' Now read the barcodes again 
   Using codecs As New RasterCodecs() 
      Using image As RasterImage = codecs.Load(imageFileName) 
         ReadBarcodes(engine.Reader, image) 
      End Using 
   End Using 
End Sub 
 
Private Sub WriteBarcode(ByVal writer As BarcodeWriter, ByVal image As RasterImage, ByVal value As String, ByVal symbolSize As MicroPDF417BarcodeSymbolSize, ByVal topLeft As Boolean) 
   ' Create the barcode data 
   Dim barcode As New MicroPDF417BarcodeData() 
   barcode.Value = value 
   barcode.DataCode = 0 
 
   ' 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 
   Dim options As New MicroPDF417BarcodeWriteOptions() 
 
   If topLeft Then 
      options.HorizontalAlignment = BarcodeAlignment.Near 
      options.VerticalAlignment = BarcodeAlignment.Near 
   Else 
      options.HorizontalAlignment = BarcodeAlignment.Far 
      options.VerticalAlignment = BarcodeAlignment.Far 
   End If 
 
   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) 
End Sub 
 
Private Sub ReadBarcodes(ByVal reader As BarcodeReader, ByVal image As RasterImage) 
   ' Setup read options 
   Dim options As 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 
 
   Console.WriteLine("Reading Barcodes") 
   Dim barcodes() As BarcodeData = reader.ReadBarcodes(image, LeadRect.Empty, 0, New BarcodeSymbology() {BarcodeSymbology.MicroPDF417}, New BarcodeReadOptions() {options}) 
   Console.WriteLine("{0} barcodes found:", barcodes.Length) 
   For Each barcode As MicroPDF417BarcodeData In barcodes 
      Console.WriteLine(" At {0} and data: {1}", barcode.Bounds, barcode.Value) 
   Next 
End Sub 
 
Public NotInheritable Class LEAD_VARS 
   Public Const ImagesDir As String = "C:\LEADTOOLS21\Resources\Images" 
End Class
Requirements

Target Platforms

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