C#条码库

条形码快速入门

using IronBarCode;
using System.Drawing;

// Reading a barcode is easy with IronBarcode!
var resultFromFile = BarcodeReader.Read(@"file/barcode.png"); // From a file
var resultFromBitMap = BarcodeReader.Read(new Bitmap("barcode.bmp")); // From a bitmap
var resultFromImage = BarcodeReader.Read(Image.FromFile("barcode.jpg")); // From an image file
var resultFromPdf = BarcodeReader.ReadPdf(@"file/mydocument.pdf"); // From PDF use ReadPdf

// To configure and fine-tune barcode reading, utilize the BarcodeReaderOptions class
var myOptionsExample = new BarcodeReaderOptions
{
    // Choose a reading speed from: Faster, Balanced, Detailed, ExtremeDetail
    // There is a tradeoff in performance as more detail is set
    Speed = ReadingSpeed.Balanced,

    // Reader will stop scanning once a single barcode is found (if set to true)
    ExpectMultipleBarcodes = true,

    // By default, all barcode formats are scanned for
    // Specifying a subset of barcode types to search for would improve performance
    ExpectBarcodeTypes = BarcodeEncoding.AllOneDimensional,

    // Utilize multiple threads to read barcodes from multiple images in parallel
    Multithreaded = true,

    // Maximum threads for parallelized barcode reading
    // Default is 4
    MaxParallelThreads = 2,

    // The area of each image frame in which to scan for barcodes
    // Specifying a crop area will significantly improve performance and avoid noisy parts of the image
    CropArea = new Rectangle(),

    // Special setting for Code39 barcodes
    // If a Code39 barcode is detected, try to read with both the base and extended ASCII character sets
    UseCode39ExtendedMode = true
};

// Read with the options applied
var results = BarcodeReader.Read("barcode.png", myOptionsExample);

// Create a barcode with one line of code
var myBarcode = BarcodeWriter.CreateBarcode("12345", BarcodeWriterEncoding.EAN8);

// After creating a barcode, we may choose to resize
myBarcode.ResizeTo(400, 100);

// Save our newly-created barcode as an image
myBarcode.SaveAsImage("EAN8.jpeg");

// Get the barcode as an image for further processing
var myBarcodeImage = myBarcode.Image;

using IronBarCode;
using System.Drawing;

// Reading a barcode is easy with IronBarcode!
var resultFromFile = BarcodeReader.Read(@"file/barcode.png"); // From a file
var resultFromBitMap = BarcodeReader.Read(new Bitmap("barcode.bmp")); // From a bitmap
var resultFromImage = BarcodeReader.Read(Image.FromFile("barcode.jpg")); // From an image file
var resultFromPdf = BarcodeReader.ReadPdf(@"file/mydocument.pdf"); // From PDF use ReadPdf

// To configure and fine-tune barcode reading, utilize the BarcodeReaderOptions class
var myOptionsExample = new BarcodeReaderOptions
{
    // Choose a reading speed from: Faster, Balanced, Detailed, ExtremeDetail
    // There is a tradeoff in performance as more detail is set
    Speed = ReadingSpeed.Balanced,

    // Reader will stop scanning once a single barcode is found (if set to true)
    ExpectMultipleBarcodes = true,

    // By default, all barcode formats are scanned for
    // Specifying a subset of barcode types to search for would improve performance
    ExpectBarcodeTypes = BarcodeEncoding.AllOneDimensional,

    // Utilize multiple threads to read barcodes from multiple images in parallel
    Multithreaded = true,

    // Maximum threads for parallelized barcode reading
    // Default is 4
    MaxParallelThreads = 2,

    // The area of each image frame in which to scan for barcodes
    // Specifying a crop area will significantly improve performance and avoid noisy parts of the image
    CropArea = new Rectangle(),

    // Special setting for Code39 barcodes
    // If a Code39 barcode is detected, try to read with both the base and extended ASCII character sets
    UseCode39ExtendedMode = true
};

// Read with the options applied
var results = BarcodeReader.Read("barcode.png", myOptionsExample);

// Create a barcode with one line of code
var myBarcode = BarcodeWriter.CreateBarcode("12345", BarcodeWriterEncoding.EAN8);

// After creating a barcode, we may choose to resize
myBarcode.ResizeTo(400, 100);

// Save our newly-created barcode as an image
myBarcode.SaveAsImage("EAN8.jpeg");

// Get the barcode as an image for further processing
var myBarcodeImage = myBarcode.Image;

PM >Install-Package BarCode

Install-Package BarCode

条形码工具

QR Code Reader from Image Online Tools

Curtis Chau

Updated: 2026年4月21日

术语QR码代表快速响应码。 QR码是可以由智能手机和其他设备读取的二维条码。它们可以用于在狭小空间中存储大量信息，常用于显示文本、联系信息、二进制代码或网站链接。 QR码首次发明于1994年，由Denso Wave公司设计。他们设计为一种可以通过扫描仪或相机电子读取的条码。 QR码的工作方式与超市的条码相同。它是一种机器可扫描的图像，可以使用智能手机的原生相机应用程序立即读取。

由于QR码可以存储大量信息，并且随着智能手机和其他设备的发明，它们变得更加便捷，因此在我们的社会中变得更加必要。它们对企业也很有帮助，因为它们允许公司在所有的营销材料上放置联系信息，这可以提高营销工作中的客户转换率。

QR码已成为我们生活的重要组成部分，因为它们可以在大多数产品、广告甚至名片上找到。 QR码已经使用多年，但由于智能手机能够扫描它们，近年来变得流行。我们可以使用Google Lens应用在手机上扫描QR码。它在Google Photos应用中可用。

还有更多在线QR码工具用于扫描QR码。让我们来看看它们：

在线QR码阅读器

4qrcode

4qrcode 是一个可以创建和扫描QR码的便捷工具。您只需输入信息（如URL），软件会自动生成您的QR码。此外，您可以将它们保存为不同格式，如PNG、JPEG、SVG和EPS。我们希望您记住您希望在其中编码哪种内容。输入文本可以是任何类型的信息。输入的示例包括文本、数字、网站链接、图像甚至视频。根据服务可以生成带有不同类型内容的QR码。有许多类型的QR码，因此请确保使用正确的类型。您可以尝试找到一个适合您选项的QR码生成器。

让我们看看如何使用4qrcode扫描QR码：

访问4qrcode 网站。

点击文件图标并选择QR码图像。您可以拖放图像文件。
当您选择图像时，它将自动解码并在下一个框中显示结果。

ZXing Decoder Online

ZXing Decoder Online 是一个在线条码和QR码扫描器。只需上传PNG或其他格式的QR码图像，它将开始解码。同样，您可以为任何信息创建QR码。大多数情况下，该信息将是您希望在QR码中编码的URL或文本。

让我们看看如何使用ZXing在线解码器：

打开ZXing Decoder 网站。

点击选择文件按钮并选择QR图像文件。选择图像后，点击提交按钮。它将开始读取代码。如果有可识别的代码，它将读取QR码并显示结果。

我们已经看到如何使用ZXing QR码应用轻松扫描QR码。

IMGonline.com.ua

IMGonline 是一个可以在线解码QR码的优秀工具。它将扫描QR码并显示解码值。让我们看看如何操作：

转到IMGonline 网站。

点击选择文件按钮，并选择QR码图像。您可以选择各种影像格式，如BMP、GIF、JPEG、PNG和TIFF格式。
选择QR码图标图像后，点击确定按钮。它将开始处理QR码并在下一页显示QR码详情。

这就是我们如何在线、免费查看QR码包含的详细信息。

IronBarcode: C#条码库

IronBarcode是一个针对C#开发者的全面条码库。它提供了一个简单的API用于用C#生成和读取条码。它还有一个QR码阅读器和QR码生成器，可以用于在C#程序中读取和生成QR码。 IronBarcode库可以解析PNG、JPEG、GIF、BMP和TIFF格式的条码。它也可以生成相同的条码类型。IronBarcode还内置了QR码生成器。

IronBarcode包含一个BarcodePrint类，以及自定义Xamarin.Forms条形码。它还增加了用于在Barcode类中选择的新颜色，除了IronBarcode中已提供的黑色、白色和红色外，还引入了新颜色以支持肤色和发色：中棕褐色、浅棕褐色、深棕色、深金/棕发混合、浅金/棕发混合。

让我们看看如何使用IronBarcode库读取QR码：

using IronBarCode;  // Make sure to include the IronBarcode namespace

// Attempt to read a barcode from the specified image
BarcodeResult result = BarcodeReader.QuicklyReadOneBarcode("QuickStart.jpg");

if (result != null)
{
    // Output the text content of the barcode if it's successfully read
    Console.WriteLine(result.Text);  
}

using IronBarCode;  // Make sure to include the IronBarcode namespace

// Attempt to read a barcode from the specified image
BarcodeResult result = BarcodeReader.QuicklyReadOneBarcode("QuickStart.jpg");

if (result != null)
{
    // Output the text content of the barcode if it's successfully read
    Console.WriteLine(result.Text);  
}

Imports IronBarCode ' Make sure to include the IronBarcode namespace

' Attempt to read a barcode from the specified image
Private result As BarcodeResult = BarcodeReader.QuicklyReadOneBarcode("QuickStart.jpg")

If result IsNot Nothing Then
	' Output the text content of the barcode if it's successfully read
	Console.WriteLine(result.Text)
End If

Imports IronBarCode ' Make sure to include the IronBarcode namespace

' Attempt to read a barcode from the specified image
Private result As BarcodeResult = BarcodeReader.QuicklyReadOneBarcode("QuickStart.jpg")

If result IsNot Nothing Then
	' Output the text content of the barcode if it's successfully read
	Console.WriteLine(result.Text)
End If

这是一种非常简单的方法，用于使用IronBarcode库读取QR码。 result变量中。

我们可以通过遵循下面的代码来改进工作：

using IronBarCode;  // Make sure to include the IronBarcode namespace
using System.Drawing;  // Needed for Rectangle

// Define a specific read area to increase scanning speed and accuracy
Rectangle readArea = new Rectangle(100, 200, 300, 400);

// Attempt to read a barcode from the specified image and area, considering only specific barcode types
BarcodeResult result = BarcodeReader.QuicklyReadOneBarcode("QuickStart.jpg", readArea, BarcodeEncoding.QRCode | BarcodeEncoding.Code128);

if (result != null)
{
    // Output the text content of the barcode if it's successfully read
    Console.WriteLine(result.Text);  
}

using IronBarCode;  // Make sure to include the IronBarcode namespace
using System.Drawing;  // Needed for Rectangle

// Define a specific read area to increase scanning speed and accuracy
Rectangle readArea = new Rectangle(100, 200, 300, 400);

// Attempt to read a barcode from the specified image and area, considering only specific barcode types
BarcodeResult result = BarcodeReader.QuicklyReadOneBarcode("QuickStart.jpg", readArea, BarcodeEncoding.QRCode | BarcodeEncoding.Code128);

if (result != null)
{
    // Output the text content of the barcode if it's successfully read
    Console.WriteLine(result.Text);  
}

Imports IronBarCode ' Make sure to include the IronBarcode namespace
Imports System.Drawing ' Needed for Rectangle

' Define a specific read area to increase scanning speed and accuracy
Private readArea As New Rectangle(100, 200, 300, 400)

' Attempt to read a barcode from the specified image and area, considering only specific barcode types
Private result As BarcodeResult = BarcodeReader.QuicklyReadOneBarcode("QuickStart.jpg", readArea, BarcodeEncoding.QRCode Or BarcodeEncoding.Code128)

If result IsNot Nothing Then
	' Output the text content of the barcode if it's successfully read
	Console.WriteLine(result.Text)
End If

Imports IronBarCode ' Make sure to include the IronBarcode namespace
Imports System.Drawing ' Needed for Rectangle

' Define a specific read area to increase scanning speed and accuracy
Private readArea As New Rectangle(100, 200, 300, 400)

' Attempt to read a barcode from the specified image and area, considering only specific barcode types
Private result As BarcodeResult = BarcodeReader.QuicklyReadOneBarcode("QuickStart.jpg", readArea, BarcodeEncoding.QRCode Or BarcodeEncoding.Code128)

If result IsNot Nothing Then
	' Output the text content of the barcode if it's successfully read
	Console.WriteLine(result.Text)
End If

这段增强代码通过指定QR码的特定扫描区域来提高读取条码的速度和准确性。我们还可以指定特定的条码格式（或多种格式），这样IronBarcode不必尝试解码所有已知的条码类型。

IronBarcode库对个人使用免费，但如果您是开发人员，则需要从IronBarcode购买许可证用于您的商业项目。它还有一个免费试用版本可以在生产中使用而没有水印。您可以无需任何支付信息即可访问试用版。一旦您决定购买软件，请访问此链接，根据您的选择选择计划。