MicroQRBarcodeData Class

C#
Visual Basic
WinRT C#
Java
Objective-C
WinRT JavaScript
C++

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

'Declaration

<TypeConverterAttribute()>
<SerializableAttribute()>
Public Class MicroQRBarcodeData 
   Inherits BarcodeData
   Implements System.ICloneable

'Usage

Dim instance As MicroQRBarcodeData

public sealed class MicroQRBarcodeData : System.ICloneable

@interface LTMicroQRBarcodeData : LTBarcodeData <NSCopying>

public class MicroQRBarcodeData extends BarcodeData

function Leadtools.Barcode.MicroQRBarcodeData()

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

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

Reading Barcodes

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

You can perform standard .NET casting to get the object as MicroQRBarcodeData and then examine the extra data properties associated with it.

MicroQR read options not related to the barcode data can be set using the MicroQRBarcodeReadOptions 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 MicroQR barcode, create an instance of MicroQRBarcodeData and fill the required parameters, then pass this object as the data parameter to WriteBarcode.

MicroQR write options not related to the barcode data can be set using the MicroQRBarcodeWriteOptions class.

You can use the static (or Shared in Visual Basic) BarcodeData.CreateDefaultBarcodeData method to create a new instance of MicroQRBarcodeData that contains default parameters ready for writing to an image:

[Visual Basic]


            Dim MicroQRData As MicroQRBarcodeData = DirectCast(BarcodeData.CreateDefaultBarcodeData(BarcodeSymbology.MicroQR), MicroQRBarcodeData)

[C#]


            MicroQRBarcodeData MicroQRData = BarcodeData.CreateDefaultBarcodeData(BarcodeSymbology.MicroQR) as MicroQRBarcodeData;

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

C#
Visual Basic
WinRT C#
WinRT JavaScript
Silverlight C#
Silverlight VB

Copy Code

Imports Leadtools
Imports Leadtools.Codecs
Imports Leadtools.Forms
Imports Leadtools.Barcode
Imports Leadtools.ImageProcessing

      
Public Sub MicroQRBarcode_Example()
   Dim imageFileName As String = Path.Combine(LEAD_VARS.ImagesDir, "MyMicroQRBarcodes.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 MicroQR barcodes
      WriteBarcode(engine.Writer, image, MicroQRBarcodeSymbolModel.AutoSize, "MicroQR Data 1", False)
      WriteBarcode(engine.Writer, image, MicroQRBarcodeSymbolModel.MicroQRM4M, "MicroQR Data 2", True)

      ' 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)
         ' Read all the MicroQR barcodes
         ReadBarcodes(engine.Reader, image)
      End Using
   End Using
End Sub

Private Sub WriteBarcode(ByVal writer As BarcodeWriter, ByVal image As RasterImage, ByVal symbolModel As MicroQRBarcodeSymbolModel, ByVal value As String, ByVal topLeft As Boolean)
   ' Create the barcode data
   Dim barcode As MicroQRBarcodeData = DirectCast(BarcodeData.CreateDefaultBarcodeData(BarcodeSymbology.MicroQR), MicroQRBarcodeData)
   barcode.Value = value

   ' We will use the alignment to position the barcodes, so use all of the image
   barcode.Bounds = New LogicalRectangle(0, 0, image.ImageWidth, image.ImageHeight, LogicalUnit.Pixel)

   ' Set the write options
   Dim options As New MicroQRBarcodeWriteOptions()

   options.XModule = 30
   options.SymbolModel = symbolModel

   ' Write it
   Console.WriteLine("Writing barcode with symbol model: {0} and Data: {1}", symbolModel, 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 MicroQRBarcodeReadOptions()

   Console.WriteLine("Reading MicroQR barcodes")
   Dim barcodes() As BarcodeData = reader.ReadBarcodes(image, LogicalRectangle.Empty, 0, New BarcodeSymbology() {BarcodeSymbology.MicroQR}, New BarcodeReadOptions() {options})
   Console.WriteLine("{0} barcodes found:", barcodes.Length)
   For Each barcode As MicroQRBarcodeData 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:\Users\Public\Documents\LEADTOOLS Images"
End Class

using Leadtools;
using Leadtools.Codecs;
using Leadtools.Forms;
using Leadtools.Barcode;
using Leadtools.ImageProcessing;

      
public void MicroQRBarcode_Example()
{
   string imageFileName = Path.Combine(LEAD_VARS.ImagesDir, "MyMicroQRBarcodes.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 MicroQR barcodes
      WriteBarcode(engine.Writer, image, MicroQRBarcodeSymbolModel.AutoSize, "MicroQR Data 1", 0);
      WriteBarcode(engine.Writer, image, MicroQRBarcodeSymbolModel.MicroQRM4M, "Data", 1000);

      // 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))
      {
         // Read all the MicroQR barcodes
         ReadBarcodes(engine.Reader, image);
      }
   }
}

private void WriteBarcode(BarcodeWriter writer, RasterImage image, MicroQRBarcodeSymbolModel symbolModel, string value, int startRow)
{
   // Create the barcode data
   MicroQRBarcodeData barcode = BarcodeData.CreateDefaultBarcodeData(BarcodeSymbology.MicroQR) as MicroQRBarcodeData;
   barcode.Value = value;

   // We will use the alignment to position the barcodes, so use all of the image
   barcode.Bounds = new LogicalRectangle(0, startRow, image.ImageWidth, image.ImageHeight, LogicalUnit.Pixel);

   // Set the write options
   MicroQRBarcodeWriteOptions options = new MicroQRBarcodeWriteOptions();

   options.XModule = 30;
   options.SymbolModel = symbolModel;

   // Write it
   Console.WriteLine("Writing barcode with symbol model: {0} and Data: {1}", symbolModel, value);
   writer.WriteBarcode(image, barcode, options);
}

private void ReadBarcodes(BarcodeReader reader, RasterImage image)
{
   // Setup read options
   MicroQRBarcodeReadOptions options = new MicroQRBarcodeReadOptions();

   Console.WriteLine("Reading MicroQR barcodes");
   BarcodeData[] barcodes = reader.ReadBarcodes(image, LogicalRectangle.Empty, 0, new BarcodeSymbology[] { BarcodeSymbology.MicroQR }, new BarcodeReadOptions[] { options });
   Console.WriteLine("{0} barcodes found:", barcodes.Length);
   foreach (MicroQRBarcodeData barcode in barcodes)
   {
      Console.WriteLine(" At {0}, and data: {1}", barcode.Bounds, barcode.Value);
   }
}

static class LEAD_VARS
{
public const string ImagesDir = @"C:\Users\Public\Documents\LEADTOOLS Images";
}

Target Platforms

Reference

MicroQRBarcodeData Members
Leadtools.Barcode Namespace
BarcodeData Class
BarcodeReader Class
BarcodeWriter Class
BarcodeSymbology Enumeration
BarcodeEngine Class
MicroQRBarcodeReadOptions Class
MicroQRBarcodeWriteOptions Class
MicroPDF417BarcodeData Class
PDF417BarcodeData Class
QRBarcodeData Class
DatamatrixBarcodeReadOptions Class
DatamatrixBarcodeWriteOptions Class
BarcodeReader.ReadBarcode
BarcodeReader.ReadBarcodes
BarcodeWriter.WriteBarcode
Programming with LEADTOOLS Barcode
Supported Barcode Symbologies
Unlocking Barcode Support
Reading Barcodes Tutorial
Writing Barcodes Tutorial
Datamatrix Barcodes in LEADTOOLS
Writing Barcodes - Bounds and XModule