Read Barcodes Asynchronously

VB C#

using IronBarCode;

// Reading many images asynchronously using ReadAsync
string[] imagePaths = new string[] { "image1.png", "image2.png" };
var resultsAsync = BarcodeReader.ReadAsync(imagePaths, new BarcodeReaderOptions() { ExpectMultipleBarcodes = true });

// Reading many PDFs asynchronously using ReadPdfAsync
string[] pdfPaths = new string[] { "doc1.pdf", "doc2.pdf" };
var resultsPdfAsync = BarcodeReader.ReadPdfsAsync(pdfPaths, new PdfBarcodeReaderOptions() { ExpectMultipleBarcodes = true, Scale = 3, DPI = 300 });

Imports IronBarCode

' Reading many images asynchronously using ReadAsync
Private imagePaths() As String = { "image1.png", "image2.png" }
Private resultsAsync = BarcodeReader.ReadAsync(imagePaths, New BarcodeReaderOptions() With {.ExpectMultipleBarcodes = True})

' Reading many PDFs asynchronously using ReadPdfAsync
Private pdfPaths() As String = { "doc1.pdf", "doc2.pdf" }
Private resultsPdfAsync = BarcodeReader.ReadPdfsAsync(pdfPaths, New PdfBarcodeReaderOptions() With {
	.ExpectMultipleBarcodes = True,
	.Scale = 3,
	.DPI = 300
})

Install-Package BarCode

Read Barcodes Asynchronously

We can read barcodes using the BarcodeReader class. The easiest method to use is the BarcodeReader.Read method. IronBarcode also has a ReadAsync method for multithreaded asynchronous programming.

Key Points

Synchronous vs Asynchronous Methods
- Read method is straightforward for use when immediate results are needed and is called on the main thread.
- ReadAsync method is for asynchronous execution, allowing the program to continue with other tasks while waiting for the barcode reading to complete.
BarcodeReaderOptions
- ExpectMultipleBarcodes: If set to true, the reader will look for multiple barcodes in the image.
- Speed: Sets the reading speed versus accuracy trade-off using the ReadingSpeed enum.
- Multithreaded: Enables multithreaded reading, which is useful for processing large numbers of images quickly.