如何用 C# 一次读取多个 BarCode；

using IronBarCode;
using System;
using System.Linq;

// Configure advanced options for mixed barcode types
BarcodeReaderOptions advancedOptions = new BarcodeReaderOptions()
{
    ExpectMultipleBarcodes = true,
    // Read both 1D and 2D barcodes
    ExpectBarcodeTypes = BarcodeEncoding.AllOneDimensional | BarcodeEncoding.QRCode | BarcodeEncoding.DataMatrix,
    // Apply image correction filters for better accuracy
    ImageFilters = new ImageFilterCollection() {
        new SharpenFilter(),
        new ContrastFilter()
    },
    // Set speed vs accuracy balance
    Speed = ReadingSpeed.Balanced
};

// Read from various sources
var imageResults = BarcodeReader.Read("mixed-barcodes.jpg", advancedOptions);
var pdfResults = BarcodeReader.ReadPdf("document-with-barcodes.pdf", advancedOptions);

// Process results with error handling
foreach (var result in imageResults)
{
    Console.WriteLine($"Barcode Type: {result.BarcodeType}");
    Console.WriteLine($"Value: {result.Value}");
    Console.WriteLine($"Confidence: {result.Confidence}%");
    Console.WriteLine($"Page: {result.PageNumber}");
    Console.WriteLine("---");
}

Imports IronBarCode
Imports System
Imports System.Linq

' Configure advanced options for mixed barcode types
Dim advancedOptions As New BarcodeReaderOptions() With {
    .ExpectMultipleBarcodes = True,
    ' Read both 1D and 2D barcodes
    .ExpectBarcodeTypes = BarcodeEncoding.AllOneDimensional Or BarcodeEncoding.QRCode Or BarcodeEncoding.DataMatrix,
    ' Apply image correction filters for better accuracy
    .ImageFilters = New ImageFilterCollection() From {
        New SharpenFilter(),
        New ContrastFilter()
    },
    ' Set speed vs accuracy balance
    .Speed = ReadingSpeed.Balanced
}

' Read from various sources
Dim imageResults = BarcodeReader.Read("mixed-barcodes.jpg", advancedOptions)
Dim pdfResults = BarcodeReader.ReadPdf("document-with-barcodes.pdf", advancedOptions)

' Process results with error handling
For Each result In imageResults
    Console.WriteLine($"Barcode Type: {result.BarcodeType}")
    Console.WriteLine($"Value: {result.Value}")
    Console.WriteLine($"Confidence: {result.Confidence}%")
    Console.WriteLine($"Page: {result.PageNumber}")
    Console.WriteLine("---")
Next

using IronBarCode;
using IronSoftware.Drawing;

// Define a crop region where the barcode is likely located
var cropRegion = new Rectangle(100, 100, 300, 200);

// Configure options for optimal single barcode reading
BarcodeReaderOptions optimizedOptions = new BarcodeReaderOptions()
{
    ExpectMultipleBarcodes = false,
    ExpectBarcodeTypes = BarcodeEncoding.Code128,
    CropArea = cropRegion,
    Speed = ReadingSpeed.Faster
};

// Read with optimized settings
var result = BarcodeReader.Read("product-label.png", optimizedOptions).FirstOrDefault();

if (result != null)
{
    Console.WriteLine($"Barcode found: {result.Value}");
    Console.WriteLine($"Read time: {result.ReadTime}ms");
}

Imports IronBarCode
Imports IronSoftware.Drawing

' Define a crop region where the barcode is likely located
Dim cropRegion As New Rectangle(100, 100, 300, 200)

' Configure options for optimal single barcode reading
Dim optimizedOptions As New BarcodeReaderOptions() With {
    .ExpectMultipleBarcodes = False,
    .ExpectBarcodeTypes = BarcodeEncoding.Code128,
    .CropArea = cropRegion,
    .Speed = ReadingSpeed.Faster
}

' Read with optimized settings
Dim result = BarcodeReader.Read("product-label.png", optimizedOptions).FirstOrDefault()

If result IsNot Nothing Then
    Console.WriteLine($"Barcode found: {result.Value}")
    Console.WriteLine($"Read time: {result.ReadTime}ms")
End If

try
{
    var results = BarcodeReader.Read("barcodes.png", new BarcodeReaderOptions 
    { 
        ExpectMultipleBarcodes = true 
    });

    if (!results.Any())
    {
        Console.WriteLine("No barcodes found in the image");
    }
    else
    {
        Console.WriteLine($"Found {results.Count()} barcodes");
    }
}
catch (Exception ex)
{
    Console.WriteLine($"Error reading barcodes: {ex.Message}");
    // Log error for debugging
}

Imports System

Try
    Dim results = BarcodeReader.Read("barcodes.png", New BarcodeReaderOptions With {
        .ExpectMultipleBarcodes = True
    })

    If Not results.Any() Then
        Console.WriteLine("No barcodes found in the image")
    Else
        Console.WriteLine($"Found {results.Count()} barcodes")
    End If
Catch ex As Exception
    Console.WriteLine($"Error reading barcodes: {ex.Message}")
    ' Log error for debugging
End Try