QR Code

QR codes have quietly become the standard bridge between the physical and digital worlds. Users are accustomed to scanning them to instantly access information, from restaurant menus to payment systems. Integrating this functionality into generated documents, especially PDFs, opens up powerful new possibilities for modern applications.

In document workflows, QR codes are more than just a convenience feature. They can transform static documents into interactive entry points by linking invoices to online payment portals, connecting contracts to verification endpoints, and enabling instant access to supplementary resources without cluttering the document itself. In industries such as logistics, healthcare, and finance, QR codes are used to encode identifiers, track assets, and provide secure access to backend systems.

From a technical perspective, integrating QR codes directly into document generation pipelines ensures consistency, automation, and reliability. Rather than manually adding links or relying on external systems, developers can embed dynamic, data-driven QR codes when a document is created, ensuring that every generated PDF contains the necessary information.

As document processes evolve toward automation and digital-first workflows, QR codes are becoming a simple yet highly effective tool for connecting documents to systems, users, and real-time data.

With TX Text Control, developers can seamlessly integrate high-quality, dynamic QR codes and other machine-readable codes into PDFs as part of automated, professional document generation workflows.

Generating QR Codes TX Text Control provides built-in support for generating QR codes, allowing developers to create and customize them directly within their document generation processes. To generate a QR code, you can use the &#9584; TX Text Control .NET Server &#9584; Barcode Namespace &#9584; TXBarcodeCore Class The TXBarcodeCore class provides properties and methods to specify type and format of barcodes provided as a Scalable Vector Graphics (SVG). " data-tippy-interactive="true" data-tippy-placement="bottom" data-tooltip-width="wide"

>TXBarcode Core class, which supports various &#9584; TX Text Control .NET Server &#9584; Barcode Namespace &#9584; TXBarcodeCore Class &#9584; BarcodeType Property Gets or sets the type of barcode that is rendered. " data-tippy-interactive="true" data-tippy-placement="bottom" data-tooltip-width="wide"

>barcode types , including QR codes, Data Matrix, and more. You can specify which content to encode, customize the size and length of the text, and apply styling to match your document's design.

Simply add the NuGet package TXTextControl.TextControl.Core.SDK to your .NET project:

Install-Package TXTextControl.TextControl.Core.SDK Then, generate a QR code using the following code snippet:

using var tx = new TXTextControl.ServerTextControl();

tx.Create();

string qrcodeText = "https://www.textcontrol.com";

var qrCode = new TXTextControl.Barcode.TXBarcodeCore(); qrCode.BarcodeType = TXTextControl.Barcode.BarcodeType.QRCode; qrCode.UpperTextLength = qrcodeText.Length; qrCode.Text = qrcodeText;

var barcodeFrame = new TXTextControl.DataVisualization.BarcodeFrame(qrCode);

tx.Barcodes.Add(barcodeFrame, - 1);

tx.Save("QRCode.pdf", TXTextControl.StreamType.AdobePDF); First, it initializes a document processing instance using &#9584; TX Text Control .NET Server &#9584; TXTextControl Namespace &#9584; ServerTextControl Class The ServerTextControl class implements a component that provide high-level text processing features for server-based applications. " data-tippy-interactive="true" data-tippy-placement="bottom" data-tooltip-width="wide"

>Server Text Control , which acts as the engine for creating and manipulating the document. Then, a QR code is defined by creating a &#9584; TX Text Control .NET Server &#9584; Barcode Namespace &#9584; TXBarcodeCore Class The TXBarcodeCore class provides properties and methods to specify type and format of barcodes provided as a Scalable Vector Graphics (SVG). " data-tippy-interactive="true" data-tippy-placement="bottom" data-tooltip-width="wide"

>TXBarcode Core object, setting its type to QR code, and assigning content, which, in this case, is a URL. The barcode is then wrapped in a &#9584; TX Text Control .NET Server &#9584; DataVisualization Namespace &#9584; BarcodeFrame Class An instance of the BarcodeFrame class represents a barcode and its layout in a Text Control document. " data-tippy-interactive="true" data-tippy-placement="bottom" data-tooltip-width="wide"

>visual container so that it can be placed inside the document and added to it. Finally, the document is saved as a PDF file, resulting in a finished document that includes the embedded QR code.

Styling the QR Code With TX Text Control, you can customize the appearance of QR codes to match your document's design. You can adjust their size, colors, and other visual properties. This level of customization ensures that the QR code serves its functional purpose and integrates seamlessly with your document's overall aesthetic.

The following code snippet demonstrates how to customize the appearance of a QR code:

qrCode.ForeColor = Color.DarkBlue; qrCode.BackColor = Color.LightYellow; qrCode.Angle = 90; In this example, the foreground color of the QR code is set to dark blue and the background color is set to light yellow. Customizing these properties allows you to create QR codes that function effectively and enhance the visual appeal of your documents.

Adding QR Codes to Headers and Footers With TX Text Control, you can add QR codes to headers and footers, ensuring they are visible on every page of the document. This feature is particularly useful for documents like invoices, as it provides users with a consistent way to access online payment portals or additional information.

You can use the following code snippet to add a QR code to a header::

using var tx = new TXTextControl.ServerTextControl();

tx.Create();

const string qrcodeText = "https://www.textcontrol.com";

var qrCode = new TXTextControl.Barcode.TXBarcodeCore { BarcodeType = TXTextControl.Barcode.BarcodeType.QRCode, UpperTextLength = qrcodeText.Length, Text = qrcodeText };

tx.Sections[1].HeadersAndFooters.Add(TXTextControl.HeaderFooterType.Header); tx.Sections[1] .HeadersAndFooters .GetItem(TXTextControl.HeaderFooterType.Header) .Barcodes .Add( new TXTextControl.DataVisualization.BarcodeFrame(qrCode), TXTextControl.HorizontalAlignment.Right, -1, TXTextControl.FrameInsertionMode.AboveTheText);

tx.Save("QRCode.pdf", TXTextControl.StreamType.AdobePDF); Dynamic QR Codes in Automated Workflows In automated document generation workflows, you can create dynamic QR codes that contain information specific to each document. For instance, you can generate a unique QR code for each invoice that links to the corresponding payment page or customer portal. This ensures that each document is personalized and functional without manual intervention.

With TX Text Control's MailMerge functionality, you can easily generate dynamic QR codes for each record in your data source. Take a look at this sample invoice template that includes a QR code. The data for the QR code is pulled from the data source, ensuring that each generated invoice has a unique QR code linking to the appropriate payment page.

The following JSON data source contains information about the invoice, including the QR code content.

[ { "PaymentLink": "https://portal.myinvoice.com/12345", "Customer_Customer": { "Name": "Sample Company Ltd." } }, { "PaymentLink": "https://portal.myinvoice.com/67890", "Customer_Customer": { "Name": "Another Company Inc." } }, { "PaymentLink": "https://portal.myinvoice.com/54321", "Customer_Customer": { "Name": "Third Company LLC" } } ] The following code snippet demonstrates how to use this data source to generate a PDF invoice with a QR code using the &#9584; TX Text Control .NET Server &#9584; DocumentServer Namespace &#9584; MailMerge Class The MailMerge class is a .NET component that can be used to effortlessly merge template documents with database content in .NET projects, such as ASP.NET web applications, web services or Windows services. " data-tippy-interactive="true" data-tippy-placement="bottom" data-tooltip-width="wide"

>Mail Merge class:

using var tx = new TXTextControl.ServerTextControl();

tx.Create(); tx.Load("invoice_qrcode.tx", TXTextControl.StreamType.InternalUnicodeFormat);

var mailMerge = new TXTextControl.DocumentServer.MailMerge { TextComponent = tx }; mailMerge.MergeJsonData(System.IO.File.ReadAllText("data.json"));

tx.Save("QRCode.pdf", TXTextControl.StreamType.AdobePDF); The screenshot below shows a generated PDF invoice with an embedded QR code. Each invoice has a unique QR code that links to its corresponding payment page. This demonstrates how dynamic QR codes can improve the functionality of generated documents in automated workflows.

Exporting QR Codes as Images (SVG) In addition to embedding QR codes directly into PDFs, TX Text Control allows you to export them as standalone images in formats such as SVG. This is useful if you want to use the QR code in other contexts or if you need a high-quality image for printing or web use.

To export a QR code as an SVG image, you can use the following code snippet:

using System.Drawing;

string qrcodeText = "https://www.textcontrol.com";

var qrCode = new TXTextControl.Barcode.TXBarcodeCore(); qrCode.BarcodeType = TXTextControl.Barcode.BarcodeType.QRCode; qrCode.UpperTextLength = qrcodeText.Length; qrCode.Text = qrcodeText;

var svgQrCode = qrCode.GetSVG(new Size(5000, 5000));

// save the svg to a file string filePath = "qrcode.svg"; System.IO.File.WriteAllText(filePath, svgQrCode); Typical Use Cases for QR Codes in PDFs QR codes in PDFs are commonly used in various industries and scenarios, including:

Invoices and Billing: Embedding QR codes that link to online payment portals for easy and secure transactions. Event Tickets: Generating QR codes that serve as digital tickets, allowing for quick scanning at entry points. Product Packaging: Including QR codes in product manuals or packaging that link to instructional videos or support resources. Marketing Materials: Adding QR codes to brochures or flyers that direct users to promotional websites or social media pages. Healthcare Documents: Using QR codes in medical reports or prescriptions to provide access to patient portals or additional information. In conclusion, QR codes are a powerful tool for enhancing PDF document functionality. With TX Text Control, developers can generate and customize QR codes with ease. They can integrate these codes into headers and footers, create dynamic codes in automated workflows, and export them as standalone images. These capabilities open up a wide range of possibilities for creating interactive, user-friendly documents that seamlessly connect users to digital resources.

Frequently Asked Questions Why should QR codes be integrated into PDF documents? QR codes transform static PDF documents into interactive entry points by linking them to digital resources such as payment portals, verification systems, or additional content. They are widely used across industries like finance, healthcare, and logistics to connect documents with backend systems and real-time data.

How can I generate QR codes in .NET using TX Text Control? You can generate QR codes using the TXBarcodeCore class provided by TX Text Control. After initializing a ServerTextControl instance, create a barcode object, set its type to QR code, assign the content to encode, and insert it into the document before exporting it as a PDF.

Can QR codes be customized in terms of design and appearance? Yes, QR codes can be fully customized. You can adjust properties such as size, foreground and background colors, and other visual settings to ensure that the QR code matches the overall design of your document while remaining fully functional.

Is it possible to add QR codes to headers or footers? Yes, QR codes can be placed in headers and footers so they appear on every page of a document. This is particularly useful for invoices or reports where consistent access to links, such as payment pages or reference systems, is required.

How do dynamic QR codes work in automated document workflows? Dynamic QR codes can be generated using data-driven approaches such as MailMerge. Each document can contain a unique QR code based on data from a source like JSON, enabling personalized documents such as invoices with individual payment links or customer-specific information.

Can QR codes be exported as images instead of embedding them in PDFs? Yes, QR codes can be exported as standalone images, including vector formats like SVG. This allows you to reuse them in other contexts such as web applications, print materials, or external systems while maintaining high quality.

What are common use cases for QR codes in PDFs? Common use cases include invoices with payment links, event tickets for quick scanning, product documentation linking to support resources, marketing materials directing users to websites, and healthcare documents providing access to patient portals.

What are the benefits of integrating QR codes directly into document generation pipelines? Integrating QR codes directly into the generation process ensures consistency, automation, and reliability. Developers can embed data-driven QR codes at creation time, eliminating manual steps and ensuring every document contains accurate and up-to-date information.

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