Dynamsoft 条码阅读器与 IronBarcode：C# 条码库对比

// Dynamsoft: license server call required at startup
using Dynamsoft.DBR;

// This call contacts Dynamsoft's license server — fails in air-gapped environments
int errorCode = BarcodeReader.InitLicense("YOUR-LICENSE-KEY", out string errorMsg);
if (errorCode != (int)EnumErrorCode.DBR_OK)
    throw new InvalidOperationException($"License validation failed: {errorMsg}");

var reader = new BarcodeReader();

// Settings tuned for camera frame processing
var settings = reader.GetRuntimeSettings();
settings.DeblurLevel = 5;          // compensates for camera motion blur
settings.ExpectedBarcodesCount = 1; // camera focus: one barcode at a time
settings.Timeout = 100;             // 100ms — optimized for 30fps video pipeline
reader.UpdateRuntimeSettings(settings);

Imports Dynamsoft.DBR

' Dynamsoft: license server call required at startup
' This call contacts Dynamsoft's license server — fails in air-gapped environments
Dim errorCode As Integer = BarcodeReader.InitLicense("YOUR-LICENSE-KEY", errorMsg:=Nothing)
If errorCode <> CType(EnumErrorCode.DBR_OK, Integer) Then
    Throw New InvalidOperationException($"License validation failed: {errorMsg}")
End If

Dim reader As New BarcodeReader()

' Settings tuned for camera frame processing
Dim settings = reader.GetRuntimeSettings()
settings.DeblurLevel = 5          ' compensates for camera motion blur
settings.ExpectedBarcodesCount = 1 ' camera focus: one barcode at a time
settings.Timeout = 100             ' 100ms — optimized for 30fps video pipeline
reader.UpdateRuntimeSettings(settings)

// Dynamsoft PDF processing — requires PdfiumViewer (external dependency)
// dotnet add package PdfiumViewer
// dotnet add package PdfiumViewer.Native.x86_64.v8-xfa (platform-specific)
using PdfiumViewer;
using System.Drawing.Imaging;
using Dynamsoft.DBR;

public List<string> ReadBarcodesFromPdf(string pdfPath)
{
    var results = new List<string>();

    using (var pdfDoc = PdfDocument.Load(pdfPath))
    {
        for (int page = 0; page < pdfDoc.PageCount; page++)
        {
            // Render each page at 300 DPI
            using var image = pdfDoc.Render(page, 300, 300, true);
            using var ms = new MemoryStream();
            image.Save(ms, ImageFormat.Png);
            byte[] imageBytes = ms.ToArray();

            // Now pass rendered image bytes to Dynamsoft
            TextResult[] barcodes = reader.DecodeFileInMemory(imageBytes, "");
            foreach (var b in barcodes)
                results.Add(b.BarcodeText);
        }
    }

    return results;
}

Imports PdfiumViewer
Imports System.Drawing.Imaging
Imports Dynamsoft.DBR

Public Function ReadBarcodesFromPdf(pdfPath As String) As List(Of String)
    Dim results As New List(Of String)()

    Using pdfDoc = PdfDocument.Load(pdfPath)
        For page As Integer = 0 To pdfDoc.PageCount - 1
            ' Render each page at 300 DPI
            Using image = pdfDoc.Render(page, 300, 300, True)
                Using ms As New MemoryStream()
                    image.Save(ms, ImageFormat.Png)
                    Dim imageBytes As Byte() = ms.ToArray()

                    ' Now pass rendered image bytes to Dynamsoft
                    Dim barcodes As TextResult() = reader.DecodeFileInMemory(imageBytes, "")
                    For Each b In barcodes
                        results.Add(b.BarcodeText)
                    Next
                End Using
            End Using
        Next
    End Using

    Return results
End Function

// IronBarcode: PDF is native — no extra library, no render loop
// NuGet: dotnet add package IronBarcode
var results = BarcodeReader.Read("invoice.pdf");
foreach (var result in results)
{
    Console.WriteLine($"{result.Format}: {result.Value}");
}

' IronBarcode: PDF is native — no extra library, no render loop
' NuGet: dotnet add package IronBarcode
Dim results = BarcodeReader.Read("invoice.pdf")
For Each result In results
    Console.WriteLine($"{result.Format}: {result.Value}")
Next

// Dynamsoft: error code pattern required
int errorCode = BarcodeReader.InitLicense("YOUR-LICENSE-KEY", out string errorMsg);
if (errorCode != (int)EnumErrorCode.DBR_OK)
{
    // Handle: network timeout, license server unreachable, invalid key,
    // expired key, device count exceeded, etc.
    throw new InvalidOperationException($"Dynamsoft license failed [{errorCode}]: {errorMsg}");
}

Imports System

' Dynamsoft: error code pattern required
Dim errorCode As Integer = BarcodeReader.InitLicense("YOUR-LICENSE-KEY", errorMsg:=Nothing)
If errorCode <> CType(EnumErrorCode.DBR_OK, Integer) Then
    ' Handle: network timeout, license server unreachable, invalid key,
    ' expired key, device count exceeded, etc.
    Throw New InvalidOperationException($"Dynamsoft license failed [{errorCode}]: {errorMsg}")
End If

// Dynamsoft offline license — device UUID required
string uuid = BarcodeReader.OutputLicenseToString();
// Send uuid to Dynamsoft support → receive licenseContent string
int errorCode = BarcodeReader.InitLicenseFromLicenseContent("YOUR-LICENSE-KEY", licenseContent, uuid, out string errorMsg);

' Dynamsoft offline license — device UUID required
Dim uuid As String = BarcodeReader.OutputLicenseToString()
' Send uuid to Dynamsoft support → receive licenseContent string
Dim errorCode As Integer = BarcodeReader.InitLicenseFromLicenseContent("YOUR-LICENSE-KEY", licenseContent, uuid, errorMsg)

// IronBarCode: local validation, no network required
IronBarCode.License.LicenseKey = "YOUR-KEY";

' IronBarCode: local validation, no network required
IronBarCode.License.LicenseKey = "YOUR-KEY"

// NuGet: dotnet add package IronBarcode
using IronBarCode;

// License — local validation, no network call
IronBarCode.License.LicenseKey = "YOUR-KEY";

// Read from an image file
var results = BarcodeReader.Read("label.png");
foreach (var result in results)
    Console.WriteLine($"{result.Format}: {result.Value}");

// Read from a PDF — native, no extra library
var pdfResults = BarcodeReader.Read("manifest.pdf");

// Read with options for high-accuracy or high-throughput scenarios
var options = new BarcodeReaderOptions
{
    Speed = ReadingSpeed.Balanced,
    ExpectMultipleBarcodes = true,
    最大并行线程数 = 4
};
var multiResults = BarcodeReader.Read("multi-barcode-sheet.png", options);

Imports IronBarCode

' License — local validation, no network call
IronBarCode.License.LicenseKey = "YOUR-KEY"

' Read from an image file
Dim results = BarcodeReader.Read("label.png")
For Each result In results
    Console.WriteLine($"{result.Format}: {result.Value}")
Next

' Read from a PDF — native, no extra library
Dim pdfResults = BarcodeReader.Read("manifest.pdf")

' Read with options for high-accuracy or high-throughput scenarios
Dim options As New BarcodeReaderOptions With {
    .Speed = ReadingSpeed.Balanced,
    .ExpectMultipleBarcodes = True,
    .最大并行线程数 = 4
}
Dim multiResults = BarcodeReader.Read("multi-barcode-sheet.png", options)

// Generate Code 128
BarcodeWriter.CreateBarcode("SHIP-7734-X", BarcodeEncoding.Code128)
    .ResizeTo(400, 100)
    .SaveAsPng("shipping-label.png");

// Generate QR with error correction and embedded logo
QRCodeWriter.CreateQrCode("https://track.example.com/7734", 500, QRCodeWriter.QrErrorCorrectionLevel.Highest)
    .AddBrandLogo("company-logo.png")
    .SaveAsPng("tracking-qr.png");

// Get bytes for HTTP response
byte[] bytes = BarcodeWriter.CreateBarcode("ITEM-001", BarcodeEncoding.Code128)
    .ResizeTo(400, 100)
    .ToPngBinaryData();

Imports System

' Generate Code 128
BarcodeWriter.CreateBarcode("SHIP-7734-X", BarcodeEncoding.Code128) _
    .ResizeTo(400, 100) _
    .SaveAsPng("shipping-label.png")

' Generate QR with error correction and embedded logo
QRCodeWriter.CreateQrCode("https://track.example.com/7734", 500, QRCodeWriter.QrErrorCorrectionLevel.Highest) _
    .AddBrandLogo("company-logo.png") _
    .SaveAsPng("tracking-qr.png")

' Get bytes for HTTP response
Dim bytes As Byte() = BarcodeWriter.CreateBarcode("ITEM-001", BarcodeEncoding.Code128) _
    .ResizeTo(400, 100) _
    .ToPngBinaryData()