BarcodeBC > Articles > How to Read a .txt File and Create a QR Code with Fewer Blocks?
On this page, you will see examples for how to read a .txt file and create a QR Code with fewer blocks in Python and C#.
To create a QR Code with fewer blocks, you can use a lower error correction level. Here's an example of how you can read a .txt file and generate a QR Code with the "Low" error correction level using the qrcode library in Python.
import qrcode # Read the contents of the text file with open('myfile.txt', 'r') as file: data = file.read() # Generate a QR Code with the Low error correction level qr = qrcode.QRCode( version=None, error_correction=qrcode.constants.ERROR_CORRECT_L, box_size=10, border=4, ) qr.add_data(data) qr.make(fit=True) # Save the QR Code as an image file img = qr.make_image(fill_color="black", back_color="white") img.save("qrcode.png")
1. In this example, we first read the contents of the text file using Python's built-in open function. Then, we create a QR Code object using the qrcode.QRCode class, specifying the Low error correction level using the qrcode.constants.ERROR_CORRECT_L constant. We also set the box size and border of the QR Code using the box_size and border parameters.
2. Next, we add the data from the text file to the QR Code object using the qr.add_data method, and then generate the QR Code using the qr.make method.
3. Finally, we save the QR Code as an image file using the qr.make_image method and the img.save method.
Note that reducing the error correction level can make the QR Code less resilient to damage or distortion, so it's important to consider the intended use case when choosing the error correction level.
Here is an example code for reading a .txt file and create a QR Code with fewer blocks using BarcodeBC.com .NET QR Code Generator Library.
using BC.NetWinBarcodeGeneratorTrial.Qrcode; // Read the text from the .txt file string text = System.IO.File.ReadAllText(@"C:\path\to\file.txt"); // Create a QR Code image and set its options Qrcode qrcode = new Qrcode(); qrcode.SetData = "YourData"; qrcode.SetUOM = UnitofMeasurement.Pixel; qrcode.SetModuleSize = 2; qrcode.SetECL = QrcodeECL.LevelL; qrcode.SetLeftSpace = 5; qrcode.SetRightSpace = 5; qrcode.SetTopSpace = 5; qrcode.SetBottomSpace = 5; // Save the barcode image to file barcode.GenerateBarcode(@"C:\path\to\qr_code.png");
In this example, the ErrorCorrectionLevel is set to L, which results in fewer blocks in the QR Code. The Quiet Zone space of QR Code is set to be 5 pixel for each side, which creates a 5 pixel quiet zone around the QR Code. You can adjust these options according to your needs.
In addition, BarcodeBC.com also provides mature .NET QR Code generator library for PDF file, as well as .NET barcode reader library for QR Code.