using IronBarCode; using System.Drawing; // Creating a barcode is as simple as: var myBarcode = BarcodeWriter.CreateBarcode("12345", BarcodeWriterEncoding.EAN8); // And save our barcode as in image: myBarcode.SaveAsImage("EAN8.jpeg"); Image myBarcodeImage = myBarcode.Image; // Can be used as Image Bitmap myBarcodeBitmap = myBarcode.ToBitmap(); // Can be used as Bitmap // 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 var resultFromPdf = BarcodeReader.ReadPdf(@"file/mydocument.pdf"); // From PDF use ReadPdf // After creating a barcode, we may choose to resize and save which is easily done with: var myNewBarcode = BarcodeWriter.CreateBarcode("12345", BarcodeWriterEncoding.EAN8); myNewBarcode.ResizeTo(400, 100); myNewBarcode.SaveAsImage("myBarcodeResized.jpeg"); // To set more options and optimization with your Barcode Reading, // Please utilize the BarcodeReaderOptions paramter of read: var myOptionsExample = new BarcodeReaderOptions { // Choose a 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 barcode is found, unless set to true ExpectMultipleBarcodes = true, // By default, all barcode formats are scanned for. // Specifying one or more, performance will increase. ExpectBarcodeTypes = BarcodeEncoding.AllOneDimensional, // Utilizes multiple threads to reads barcodes from multiple images in parallel. Multithreaded = true, // Maximum threads for parallel. Default is 4 MaxParallelThreads = 2, // The area of each image frame in which to scan for barcodes. // Will improve performance significantly and avoid unwanted results and avoid noisy parts of the image. CropArea = new Rectangle(), // Special Setting for Code39 Barcodes. // If a Code39 barcode is detected. Try to use extended mode for the full ASCII Character Set UseCode39ExtendedMode = true }; // And, apply: var results = BarcodeReader.Read("barcode.png", myOptionsExample);

using IronBarCode; using System.Drawing; /*** CREATING BARCODE IMAGES ***/ // Shorthand:: Create and save a barcode in a single line of code BarcodeWriter.CreateBarcode("12345", BarcodeWriterEncoding.EAN8).ResizeTo(400, 100).SaveAsImage("EAN8.jpeg"); /***** IN-DEPTH BARCODE CREATION OPTIONS *****/ // BarcodeWriter.CreateBarcode creates a GeneratedBarcode which can be styles and exported as an Image object or File GeneratedBarcode MyBarCode = BarcodeWriter.CreateBarcode("Any Number, String or Binary Value", BarcodeWriterEncoding.Code128); // Style the Barcode in a fluent LINQ style fashion MyBarCode.ResizeTo(300, 150).SetMargins(20).AddAnnotationTextAboveBarcode("Example EAN8 Barcode").AddBarcodeValueTextBelowBarcode(); MyBarCode.ChangeBackgroundColor(Color.LightGoldenrodYellow); // Save MyBarCode as an image file MyBarCode.SaveAsImage("MyBarCode.png"); MyBarCode.SaveAsGif("MyBarCode.gif"); MyBarCode.SaveAsHtmlFile("MyBarCode.html"); MyBarCode.SaveAsJpeg("MyBarCode.jpg"); MyBarCode.SaveAsPdf("MyBarCode.Pdf"); MyBarCode.SaveAsPng("MyBarCode.png"); MyBarCode.SaveAsTiff("MyBarCode.tiff"); MyBarCode.SaveAsWindowsBitmap("MyBarCode.bmp"); // Save MyBarCode as a .NET native objects Image MyBarCodeImage = MyBarCode.Image; Bitmap MyBarCodeBitmap = MyBarCode.ToBitmap(); byte[] PngBytes = MyBarCode.ToPngBinaryData(); using (System.IO.Stream PdfStream = MyBarCode.ToPdfStream()) { // Stream barcode image output also works for GIF,JPEG, PDF, PNG, BMP and TIFF } // Save MyBarCode as HTML files and tags MyBarCode.SaveAsHtmlFile("MyBarCode.Html"); string ImgTagForHTML = MyBarCode.ToHtmlTag(); string DataURL = MyBarCode.ToDataUrl(); // Save MyBarCode to a new PDF, or stamp it in any position on any page(s) of an existing Document MyBarCode.SaveAsPdf("MyBarCode.Pdf"); MyBarCode.StampToExistingPdfPage("ExistingPDF.pdf", 200, 50, 1); // position 200x50 on page 1 MyBarCode.StampToExistingPdfPages("ExistingPDF.pdf", 200, 50, new[] { 1, 2, 3 }, "Password123"); // multiple pages of an encrypted PDF

using IronBarCode; using System; using System.Drawing; /*** STYLING GENERATED BARCODES ***/ // BarcodeWriter.CreateBarcode creates a GeneratedBarcode object which allows the barcode to be styled and annotated. GeneratedBarcode MyBarCode = BarcodeWriter.CreateBarcode("Iron Software", BarcodeWriterEncoding.QRCode); // Any text (or commonly, the value of the barcode) can be added to the image in a default or specified font. // Text positions are automatically centered, above or below. Fonts that are too large for a given image are automatically scaled down. MyBarCode.AddBarcodeValueTextBelowBarcode(); MyBarCode.AddAnnotationTextAboveBarcode("This is My Barcode", new Font(new FontFamily("Arial"), 12, FontStyle.Regular, GraphicsUnit.Pixel), Color.DarkSlateBlue); // Resize, add Margins and Check final Image Dimensions MyBarCode.ResizeTo(300, 300); // pixels MyBarCode.SetMargins(0, 20, 0, 20); int FinalWidth = MyBarCode.Width; int FinalHeight = MyBarCode.Height; //Recolor the barcode and its background MyBarCode.ChangeBackgroundColor(Color.LightGray); MyBarCode.ChangeBarCodeColor(Color.DarkSlateBlue); if (!MyBarCode.Verify()) { Console.WriteLine("Color contrast should be at least 50% or a barcode may become unreadable. Test using GeneratedBarcode.Verify()"); } // Finally save the result MyBarCode.SaveAsHtmlFile("StyledBarcode.html"); /*** STYLING BARCODES IN A SINGLE LINQ STYLE EXPRESSION ***/ // Fluent API BarcodeWriter.CreateBarcode("https://ironsoftware.com", BarcodeWriterEncoding.Aztec).ResizeTo(250, 250).SetMargins(10).AddBarcodeValueTextAboveBarcode().SaveAsImage("StyledBarcode.png"); /*** STYLING QR CODES WITH LOGO IMAGES OR BRANDING ***/ // Use the QRCodeWriter.CreateQrCodeWithLogo Method instead of BarcodeWriter.CreateBarcode // Logo will automatically be sized appropriately and snapped to the QR grid. var qrCodeLogo = new QRCodeLogo("ironsoftware_logo.png"); GeneratedBarcode myQRCodeWithLogo = QRCodeWriter.CreateQrCodeWithLogo("https://ironsoftware.com/", qrCodeLogo); myQRCodeWithLogo.ResizeTo(500, 500).SetMargins(10).ChangeBarCodeColor(Color.DarkGreen); myQRCodeWithLogo.ResizeTo(500, 500).SetMargins(10).ChangeBarCodeColor(Color.DarkGreen); myQRCodeWithLogo.SaveAsPng("QRWithLogo.Png").SaveAsPdf("MyVerifiedQR.html"); // save as 2 formats

使用IRONBARCODE

如何在C# Windows应用程序中生成二维码

更新 2024年二月7日

本教程将深入介绍如何创建 QR 码，QR 码在工业应用和零售业越来越受欢迎。IronBarcode 库是最流行、功能最强大的库之一，将用于演示如何生成 QR 码。

如何在 C# Windows Forms 应用程序中生成 QR 码

1.在 Microsoft Visual Studio 中创建 Windows 窗体应用程序

2.安装 QR 码库

3.导入命名空间以创建条形码

4.用一行代码创建 QR 码

5.在 QR 码图像中添加徽标

6.将图像保存为 PDF 或 HTML

1.在 Microsoft Visual Studio 中创建 Windows 窗体应用程序

打开 Visual Studio > 点击 Create New Project > 选择 Windows Forms Application Template > 点击 Next > 给项目命名 > 点击 Next > 选择目标 .NET Framework > 点击 Create按钮。

创建项目后，从 Visual Studio 工具箱中设计窗体如下：图片框"、"标签"、"文本框 "和 "按钮 "控件。

如何在 C# Windows 应用程序中生成 QR 码，图 1：加载图像并生成 QR 码的 Windows 窗体应用程序用户界面

加载图像并生成 QR 码的 Windows 窗体应用程序用户界面

2.在 C&num 中安装 QR 码生成器 .NET 库；

第一步是安装条形码库。您可以使用以下三种方法之一进行安装：

2.1.软件包管理器控制台

在软件包管理器控制台中编写以下命令。它将为你下载并安装软件包。

Install-Package BarCode

如何在 C# Windows 应用程序中生成 QR 码，图 2：软件包管理器控制台用户界面中的安装进度

软件包管理器控制台用户界面中的安装进度

3.2.NuGet 软件包管理器解决方案

您也可以使用 NuGet 软件包解决方案安装条形码库。只需按照以下步骤操作即可：

点击工具 > NuGet软件包管理器 > 管理解决方案的 NuGet 软件包。

这将为您打开 NuGet 包管理器。点击浏览并搜索 BarCode，然后安装类库。

如何在 C# Windows 应用程序中生成 QR 码，图 3：在 NuGet 包管理器中查找条形码库

在 NuGet 软件包管理器中查找条形码库

3.3.从链接下载

作为替代方案，您可以 IronBarCode.Dll 可以从这里下载并添加到您的项目中作为参考。[.NET条形码 DLL].

3.导入名称空间

在本教程中，为确保充分引用，需要将 "IronBarCode "命名空间与其他系统程序集一起导入。

using IronBarCode;
using System;
using System.Drawing;
using System.Linq;

using IronBarCode;
using System;
using System.Drawing;
using System.Linq;

Imports IronBarCode
Imports System
Imports System.Drawing
Imports System.Linq

VB C#

4.用一行代码创建 QR 码

以下示例代码只需一行代码就能生成 QR 码图像。在要生成二维码的文本框中输入所需的文本。将此代码放入 "生成 PNG "按钮点击事件中。QR 码条形码图像可以保存为 PNG 格式。

// Simple QR Code generation
private void button1_Click(object sender, EventArgs e)
{
    GeneratedBarcode qrCode = QRCodeWriter.CreateQrCode(textBox1.Text);
    qrCode.SaveAsPng("QrCode.png");
}

// Simple QR Code generation
private void button1_Click(object sender, EventArgs e)
{
    GeneratedBarcode qrCode = QRCodeWriter.CreateQrCode(textBox1.Text);
    qrCode.SaveAsPng("QrCode.png");
}

' Simple QR Code generation
Private Sub button1_Click(ByVal sender As Object, ByVal e As EventArgs)
	Dim qrCode As GeneratedBarcode = QRCodeWriter.CreateQrCode(textBox1.Text)
	qrCode.SaveAsPng("QrCode.png")
End Sub

VB C#

下面是二维码生成器的输出结果：

如何在 C# Windows 应用程序中生成 QR 码，图 4：QR 码： https://ironsoftware.com/csharp/barcode/docs/

QR 代码为：https://ironsoftware.com/csharp/barcode/docs/

5.为 QR 码图像添加徽标

使用创建带标识的 QrCode 方法中的 QRCodeWriter 类，可以在 QR 代码中添加徽标等附加信息。示例代码说明了这一点有多简单。

从电脑中浏览徽标，它将在 "PictureBox "中打开。代码如下

// open file dialog
OpenFileDialog open = new OpenFileDialog();
// image filters
open.Filter = "Image Files(*.jpg; *.png; *.jpeg; *.gif; *.bmp)
*.jpg; *.png; *.jpeg; *.gif; *.bmp";
if (open.ShowDialog() == DialogResult.OK) {
    // display image in picture box
    pictureBox1.Image = new Bitmap(open.FileName);
    // store image file path in class data member. Initialize it as string ImageFileName;
    ImageFileName = open.FileName;
}

// open file dialog
OpenFileDialog open = new OpenFileDialog();
// image filters
open.Filter = "Image Files(*.jpg; *.png; *.jpeg; *.gif; *.bmp)
*.jpg; *.png; *.jpeg; *.gif; *.bmp";
if (open.ShowDialog() == DialogResult.OK) {
    // display image in picture box
    pictureBox1.Image = new Bitmap(open.FileName);
    // store image file path in class data member. Initialize it as string ImageFileName;
    ImageFileName = open.FileName;
}

IRON VB CONVERTER ERROR developers@ironsoftware.com

VB C#

接下来，只需在文本框中键入文本，将代码放入生成 PNG 按钮，然后单击。

// Adding a Logo
GeneratedBarcode Qrcode = QRCodeWriter.CreateQrCodeWithLogo(textBox1.Text, ImageFileName,500);
Qrcode.SaveAsPng("QrCodeWithImage.png");

// Adding a Logo
GeneratedBarcode Qrcode = QRCodeWriter.CreateQrCodeWithLogo(textBox1.Text, ImageFileName,500);
Qrcode.SaveAsPng("QrCodeWithImage.png");

' Adding a Logo
Dim Qrcode As GeneratedBarcode = QRCodeWriter.CreateQrCodeWithLogo(textBox1.Text, ImageFileName,500)
Qrcode.SaveAsPng("QrCodeWithImage.png")

VB C#

此代码将铁徽标添加到条形码中。它会自动将徽标的尺寸调整到合适的大小，使纯条形码仍然可读，并将徽标与 QR 码方格对齐，使其看起来合适。

如何在 C# Windows 应用程序中生成 QR 码，图 5：C# 使用徽标图像创建 QR 码

C# 创建带有徽标图像的 QR 码

6.保存为 PDF 或 HTML 图像

最后，生成的 QR 代码可以保存为 PDF 或 HTML 图像。为方便起见，最后一行代码会在默认的 PDF 浏览器中打开 PDF。添加保存为 PDF 生成 PDF 按钮，然后保存为 HTMLFile 中的 "生成 HTML "按钮。

// Adding a Logo
GeneratedBarcode qrCode = QRCodeWriter.CreateQrCodeWithLogo(textBox1.Text, ImageFileName,500);

//Save as PDF
qrCode.SaveAsPdf("QRWithLogo.pdf");

//Also Save as HTML
qrCode.SaveAsHtmlFile("QRWithLogo.html");

// Adding a Logo
GeneratedBarcode qrCode = QRCodeWriter.CreateQrCodeWithLogo(textBox1.Text, ImageFileName,500);

//Save as PDF
qrCode.SaveAsPdf("QRWithLogo.pdf");

//Also Save as HTML
qrCode.SaveAsHtmlFile("QRWithLogo.html");

' Adding a Logo
Dim qrCode As GeneratedBarcode = QRCodeWriter.CreateQrCodeWithLogo(textBox1.Text, ImageFileName,500)

'Save as PDF
qrCode.SaveAsPdf("QRWithLogo.pdf")

'Also Save as HTML
qrCode.SaveAsHtmlFile("QRWithLogo.html")

VB C#