using Cloudmersive.APIClient.NET.Barcode.Api;
using Cloudmersive.APIClient.NET.Barcode.Client;
using System;
using System.Threading;
using System.Threading.Tasks;

public class CloudmersiveBarcodeService
{
    private readonly BarcodeScanApi _scanApi;
    private static int _requestCount = 0;

    public CloudmersiveBarcodeService()
    {
        Configuration.Default.ApiKey.Add("Apikey", "YOUR-CLOUDMERSIVE-API-KEY");
        _scanApi = new BarcodeScanApi();
    }

    public async Task<string> ScanWithRetry(byte[] imageBytes, int maxRetries = 3)
    {
        for (int attempt = 1; attempt <= maxRetries; attempt++)
        {
            try
            {
                Interlocked.Increment(ref _requestCount);

                using var stream = new System.IO.MemoryStream(imageBytes);
                var result = await _scanApi.BarcodeScanImageAsync(stream);

                if (result.Successful == true)
                    return result.RawText;

                throw new InvalidOperationException("Scan unsuccessful");
            }
            catch (ApiException ex) when (ex.ErrorCode == 429)
            {
                if (attempt < maxRetries)
                    await Task.Delay(TimeSpan.FromSeconds(Math.Pow(2, attempt)));
                else
                    throw;
            }
            catch (Exception) when (attempt < maxRetries)
            {
                await Task.Delay(TimeSpan.FromMilliseconds(500 * attempt));
            }
        }
        throw new InvalidOperationException("All retry attempts failed");
    }
}

Imports Cloudmersive.APIClient.NET.Barcode.Api
Imports Cloudmersive.APIClient.NET.Barcode.Client
Imports System
Imports System.Threading
Imports System.Threading.Tasks

Public Class CloudmersiveBarcodeService
    Private ReadOnly _scanApi As BarcodeScanApi
    Private Shared _requestCount As Integer = 0

    Public Sub New()
        Configuration.Default.ApiKey.Add("Apikey", "YOUR-CLOUDMERSIVE-API-KEY")
        _scanApi = New BarcodeScanApi()
    End Sub

    Public Async Function ScanWithRetry(imageBytes As Byte(), Optional maxRetries As Integer = 3) As Task(Of String)
        For attempt As Integer = 1 To maxRetries
            Try
                Interlocked.Increment(_requestCount)

                Using stream As New System.IO.MemoryStream(imageBytes)
                    Dim result = Await _scanApi.BarcodeScanImageAsync(stream)

                    If result.Successful = True Then
                        Return result.RawText
                    End If

                    Throw New InvalidOperationException("Scan unsuccessful")
                End Using
            Catch ex As ApiException When ex.ErrorCode = 429
                If attempt < maxRetries Then
                    Await Task.Delay(TimeSpan.FromSeconds(Math.Pow(2, attempt)))
                Else
                    Throw
                End If
            Catch ex As Exception When attempt < maxRetries
                Await Task.Delay(TimeSpan.FromMilliseconds(500 * attempt))
            End Try
        Next
        Throw New InvalidOperationException("All retry attempts failed")
    End Function
End Class

// NuGet: dotnet add package IronBarcode
using IronBarCode;

IronBarCode.License.LicenseKey = "YOUR-LICENSE-KEY";

// Generate locally
BarcodeWriter.CreateBarcode("https://example.com", BarcodeEncoding.QRCode)
    .SaveAsPng("qr.png");

// Read locally
var result = BarcodeReader.Read("barcode.png").First();
Console.WriteLine(result.Value);

Imports IronBarCode

IronBarCode.License.LicenseKey = "YOUR-LICENSE-KEY"

' Generate locally
BarcodeWriter.CreateBarcode("https://example.com", BarcodeEncoding.QRCode) _
    .SaveAsPng("qr.png")

' Read locally
Dim result = BarcodeReader.Read("barcode.png").First()
Console.WriteLine(result.Value)

using IronBarCode;

IronBarCode.License.LicenseKey = "YOUR-LICENSE-KEY";

var options = new BarcodeReaderOptions
{
    Speed = ReadingSpeed.Balanced,
    ExpectMultipleBarcodes = true,
};

string[] invoicePaths = Directory.GetFiles("invoices", "*.pdf");

foreach (var invoicePath in invoicePaths)
{
    // One call per invoice processes all pages and all barcodes
    var barcodes = BarcodeReader.Read(invoicePath, options);

    foreach (var barcode in barcodes)
    {
        Console.WriteLine($"Invoice: {invoicePath} | Page: {barcode.PageNumber} | {barcode.Format}: {barcode.Value}");
    }
}

Imports IronBarCode

IronBarCode.License.LicenseKey = "YOUR-LICENSE-KEY"

Dim options As New BarcodeReaderOptions With {
    .Speed = ReadingSpeed.Balanced,
    .ExpectMultipleBarcodes = True
}

Dim invoicePaths As String() = Directory.GetFiles("invoices", "*.pdf")

For Each invoicePath In invoicePaths
    ' One call per invoice processes all pages and all barcodes
    Dim barcodes = BarcodeReader.Read(invoicePath, options)

    For Each barcode In barcodes
        Console.WriteLine($"Invoice: {invoicePath} | Page: {barcode.PageNumber} | {barcode.Format}: {barcode.Value}")
    Next
Next