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ReadBarcodes Method

Summary

Read the barcodes found on this page.

Syntax

C#
VB
Java
C++
Public Function ReadBarcodes( 
   ByVal bounds As LeadRectD, 
   ByVal maximumBarcodes As Integer, 
   ByVal symbologies() As BarcodeSymbology 
) As BarcodeData() 
public:  
   array<BarcodeData^>^ ReadBarcodes( 
      LeadRectD^ bounds, 
      int maximumBarcodes, 
      array<BarcodeSymbology^>^ symbologies 
   ) 
public BarcodeData[] readBarcodes(LeadRectD bounds, int maximumBarcodes, BarcodeSymbology[] symbologies) 

Parameters

bounds

Search area in page coordinates. If this value is Empty, then the whole page is searched for barcodes.

maximumBarcodes

Maximum number of barcodes to read. Use -1 to read all the barcodes found.

symbologies

Barcode symbologies to search for. If this value is null or an empty array, then all barcode symbologies are used.

Return Value

Array containing the data for each barcode found. An empty array is returned if no barcodes were found on the page.

Remarks

Refer to BarcodeEngine, BarcodeReader and BarcodeReader.ReadBarcodes for more information on reading barcodes using LEADTOOLS.

This method uses the engine set in DocumentBarcodes.BarcodeEngine. If this value is null then no barcodes are read and this method will return an empty array.

This method calls GetImage and then BarcodeReader.ReadBarcodes to read the barcodes.

Since the search area and options used can differ greatly from one call to the another, the document will never save the barcodes found in the cache. Each call to ReadBarcodes will re-read all the barcodes from the page image.

Example

For an example, refer to DocumentBarcodes.

Requirements

Target Platforms

Help Version 19.0.2017.10.18
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