C# 文字列からバーコードを生成する：IronBarcodeによる完全なチュートリアル

dotnet add package Barcode

using IronBarCode;

Imports IronBarCode

using IronBarCode;

// Generate a Code 128 barcode from a product SKU string
string productCode = "SKU-78432-A";
var barcode = BarcodeWriter.CreateBarcode(productCode, BarcodeEncoding.Code128);
barcode.SaveAsPng("product_barcode.png");

Imports IronBarCode

' Generate a Code 128 barcode from a product SKU string
Dim productCode As String = "SKU-78432-A"
Dim barcode = BarcodeWriter.CreateBarcode(productCode, BarcodeEncoding.Code128)
barcode.SaveAsPng("product_barcode.png")

using IronBarCode;

string url = "https://ironsoftware.com/csharp/barcode/";
string numericId = "0123456789012";

// QR Code -- best for URLs, text data, and mobile scanning
BarcodeWriter.CreateBarcode(url, BarcodeEncoding.QRCode)
    .SaveAsPng("qrcode.png");

// UPC-A -- required for retail point-of-sale systems (12 digits)
BarcodeWriter.CreateBarcode(numericId, BarcodeEncoding.UPCA)
    .SaveAsPng("upc_barcode.png");

// PDF417 -- suited for documents that need higher data capacity
BarcodeWriter.CreateBarcode("Extended product details here", BarcodeEncoding.PDF417)
    .SaveAsJpeg("pdf417_barcode.jpeg");

Imports IronBarCode

Dim url As String = "https://ironsoftware.com/csharp/barcode/"
Dim numericId As String = "0123456789012"

' QR Code -- best for URLs, text data, and mobile scanning
BarcodeWriter.CreateBarcode(url, BarcodeEncoding.QRCode) _
    .SaveAsPng("qrcode.png")

' UPC-A -- required for retail point-of-sale systems (12 digits)
BarcodeWriter.CreateBarcode(numericId, BarcodeEncoding.UPCA) _
    .SaveAsPng("upc_barcode.png")

' PDF417 -- suited for documents that need higher data capacity
BarcodeWriter.CreateBarcode("Extended product details here", BarcodeEncoding.PDF417) _
    .SaveAsJpeg("pdf417_barcode.jpeg")

using IronBarCode;
using IronSoftware.Drawing;

string orderNumber = "ORD-2024-00542";
var styledBarcode = BarcodeWriter.CreateBarcode(orderNumber, BarcodeEncoding.Code128);

// Adjust colors to match brand identity
styledBarcode.ChangeBarCodeColor(Color.DarkBlue);
styledBarcode.ChangeBackgroundColor(Color.White);

// Add readable text annotations above and below the bars
styledBarcode.AddAnnotationTextAboveBarcode("Order Number", new Font("Arial", 12), Color.Black, 5);
styledBarcode.AddBarcodeValueTextBelowBarcode(new Font("Arial", 10), Color.Gray, 5);

// Resize to fit a thermal label at 400 x 150 pixels
styledBarcode.ResizeTo(400, 150);
styledBarcode.SaveAsPng("styled_order_barcode.png");

Imports IronBarCode
Imports IronSoftware.Drawing

Dim orderNumber As String = "ORD-2024-00542"
Dim styledBarcode = BarcodeWriter.CreateBarcode(orderNumber, BarcodeEncoding.Code128)

' Adjust colors to match brand identity
styledBarcode.ChangeBarCodeColor(Color.DarkBlue)
styledBarcode.ChangeBackgroundColor(Color.White)

' Add readable text annotations above and below the bars
styledBarcode.AddAnnotationTextAboveBarcode("Order Number", New Font("Arial", 12), Color.Black, 5)
styledBarcode.AddBarcodeValueTextBelowBarcode(New Font("Arial", 10), Color.Gray, 5)

' Resize to fit a thermal label at 400 x 150 pixels
styledBarcode.ResizeTo(400, 150)
styledBarcode.SaveAsPng("styled_order_barcode.png")

using IronBarCode;

// Data sourced from a database query result
List<string> productIds =
[
    "PROD-001-X",
    "PROD-002-Y",
    "PROD-003-Z",
    "PROD-004-W"
];

// Generate one barcode image per product ID
foreach (string productId in productIds)
{
    var barcode = BarcodeWriter.CreateBarcode(productId, BarcodeEncoding.Code128, 300, 100);
    barcode.SaveAsPng($"barcodes/{productId}.png");
}

Imports IronBarCode

' Data sourced from a database query result
Dim productIds As New List(Of String) From {
    "PROD-001-X",
    "PROD-002-Y",
    "PROD-003-Z",
    "PROD-004-W"
}

' Generate one barcode image per product ID
For Each productId As String In productIds
    Dim barcode = BarcodeWriter.CreateBarcode(productId, BarcodeEncoding.Code128, 300, 100)
    barcode.SaveAsPng($"barcodes/{productId}.png")
Next

using IronBarCode;

string value = "EXPORT-TEST-001";
var barcode = BarcodeWriter.CreateBarcode(value, BarcodeEncoding.Code128, 400, 120);

// Save to disk in multiple formats
barcode.SaveAsPng("barcode.png");       // Lossless -- best for print
barcode.SaveAsJpeg("barcode.jpg");      // Compressed -- smaller file size
barcode.SaveAsGif("barcode.gif");       // Compatible with legacy systems
barcode.SaveAsTiff("barcode.tiff");     // Multi-page archival format
barcode.SaveAsBmp("barcode.bmp");       // Uncompressed bitmap

// Export as a byte array for in-memory operations (API responses, database storage)
byte[] pngBytes = barcode.ToStream(ImageFormat.Png).ToArray();

Imports IronBarCode

Dim value As String = "EXPORT-TEST-001"
Dim barcode = BarcodeWriter.CreateBarcode(value, BarcodeEncoding.Code128, 400, 120)

' Save to disk in multiple formats
barcode.SaveAsPng("barcode.png")       ' Lossless -- best for print
barcode.SaveAsJpeg("barcode.jpg")      ' Compressed -- smaller file size
barcode.SaveAsGif("barcode.gif")       ' Compatible with legacy systems
barcode.SaveAsTiff("barcode.tiff")     ' Multi-page archival format
barcode.SaveAsBmp("barcode.bmp")       ' Uncompressed bitmap

' Export as a byte array for in-memory operations (API responses, database storage)
Dim pngBytes As Byte() = barcode.ToStream(ImageFormat.Png).ToArray()

using IronBarCode;

bool TryCreateBarcode(string value, BarcodeEncoding encoding, string outputPath)
{
    if (string.IsNullOrWhiteSpace(value))
    {
        Console.WriteLine("Value must not be empty.");
        return false;
    }

    try
    {
        var barcode = BarcodeWriter.CreateBarcode(value, encoding);
        barcode.SaveAsPng(outputPath);
        return true;
    }
    catch (IronBarCodeEncodingException ex)
    {
        Console.WriteLine($"Encoding failed: {ex.Message}");
        return false;
    }
}

// Usage
TryCreateBarcode("SKU-001", BarcodeEncoding.Code128, "output.png");   // succeeds
TryCreateBarcode("NOT-NUMERIC", BarcodeEncoding.UPCA, "output.png");  // encoding exception

Imports IronBarCode

Function TryCreateBarcode(value As String, encoding As BarcodeEncoding, outputPath As String) As Boolean
    If String.IsNullOrWhiteSpace(value) Then
        Console.WriteLine("Value must not be empty.")
        Return False
    End If

    Try
        Dim barcode = BarcodeWriter.CreateBarcode(value, encoding)
        barcode.SaveAsPng(outputPath)
        Return True
    Catch ex As IronBarCodeEncodingException
        Console.WriteLine($"Encoding failed: {ex.Message}")
        Return False
    End Try
End Function

' Usage
TryCreateBarcode("SKU-001", BarcodeEncoding.Code128, "output.png")   ' succeeds
TryCreateBarcode("NOT-NUMERIC", BarcodeEncoding.UPCA, "output.png")  ' encoding exception

using IronBarCode;

// Read all barcodes from an image file
var results = BarcodeReader.Read("product_barcode.png");

foreach (var result in results)
{
    // Output the decoded string value
    Console.WriteLine($"Decoded value: {result.Value}");
    Console.WriteLine($"形式 detected: {result.BarcodeType}");
}

Imports IronBarCode

' Read all barcodes from an image file
Dim results = BarcodeReader.Read("product_barcode.png")

For Each result In results
    ' Output the decoded string value
    Console.WriteLine($"Decoded value: {result.Value}")
    Console.WriteLine($"形式 detected: {result.BarcodeType}")
Next

using IronBarCode;
using Microsoft.AspNetCore.Mvc;

var builder = WebApplication.CreateBuilder(args);
var app = builder.Build();

// Minimal API endpoint -- returns a barcode PNG for the given value
app.MapGet("/barcode/{value}", (string value) =>
{
    var barcode = BarcodeWriter.CreateBarcode(value, BarcodeEncoding.Code128, 400, 120);
    byte[] imageBytes = barcode.ToStream(ImageFormat.Png).ToArray();
    return Results.File(imageBytes, "image/png");
});

app.Run();

Imports IronBarCode
Imports Microsoft.AspNetCore.Mvc

Dim builder = WebApplication.CreateBuilder(args)
Dim app = builder.Build()

' Minimal API endpoint -- returns a barcode PNG for the given value
app.MapGet("/barcode/{value}", Function(value As String)
                                   Dim barcode = BarcodeWriter.CreateBarcode(value, BarcodeEncoding.Code128, 400, 120)
                                   Dim imageBytes As Byte() = barcode.ToStream(ImageFormat.Png).ToArray()
                                   Return Results.File(imageBytes, "image/png")
                               End Function)

app.Run()