How to Generate QR Codes in C# .NET Framework

The free-form text encoding that QR codes offer helps bridge the gap between physical and digital worlds. With the help of a low-code API, we can generate our own QR codes at scale to accompany any text (or URLs) of our choosing.

Using the code examples provided below, we can call a free API that generates QR codes as PNG images based on our choice of text input. We can generate up to 800 QR code images per month with a free API key, so we can easily take care of small-scale needs for our business or personal use case.

Once we have a free API key, we can begin by installing the SDK. Let’s install via NuGet by running the below command in our Package Manager console:

Install-Package Cloudmersive.APIClient.NET.Barcode -Version 3.0.2

With installation complete, we can now call the function. Let’s go ahead and copy the below code into our file & include our API key and text inputs in the appropriate fields:

using System;
using System.Diagnostics;
using Cloudmersive.APIClient.NET.Barcode.Api;
using Cloudmersive.APIClient.NET.Barcode.Client;
using Cloudmersive.APIClient.NET.Barcode.Model;

namespace Example
{
    public class GenerateBarcodeQRCodeExample
    {
        public void main()
        {
            // Configure API key authorization: Apikey
            Configuration.Default.AddApiKey("Apikey", "YOUR_API_KEY");

            var apiInstance = new GenerateBarcodeApi();
            var value = value_example;  // string | QR code text to convert into the QR code barcode

            try
            {
                // Generate a QR code barcode as PNG file
                byte[] result = apiInstance.GenerateBarcodeQRCode(value);
                Debug.WriteLine(result);
            }
            catch (Exception e)
            {
                Debug.Print("Exception when calling GenerateBarcodeApi.GenerateBarcodeQRCode: " + e.Message );
            }
        }
    }
}

Now we’re all set — we can easily churn out new QR codes without worrying about cost or coding overhead.