BarcodeBC > Articles > How to Generate a Specified Number of QR Codes with Different Tables Assigned?
To generate a specified number of QR Codes with different tables assigned, you can use a loop to create each QR Code and assign a different table to it. Here is an example code snippet in Python.
import qrcode import urllib.parse # Define the number of QR Codes to generate num_qr_codes = 5 # Loop to generate each QR Code with a different table assigned for i in range(num_qr_codes): # Generate the data to encode in the QR Code data = {'table': f'table_{i+1}'} # Convert the data to URL parameters format url_params = urllib.parse.urlencode(data) # Create the QR Code object with the data encoded qr = qrcode.QRCode(version=1, box_size=10, border=4) qr.add_data('https://example.com?' + url_params) qr.make(fit=True) # Save the QR Code as an image file qr_file = f'qr_code_{i+1}.png' qr.make_image(fill_color='black', back_color='white').save(qr_file)
This code will generate 5 QR Codes, with each QR Code containing a different table assigned to it. The table is added to the QR Code data as a URL parameter, which can be read by the receiving end. The QR Codes are saved as PNG image files with names qr_code_1.png to qr_code_5.png.
To generate a specified number of QR Codes with different tables assigned to URL parameters in C#, you can refer to the following C# code using the BarcodeBC.com .NET QR Code Generator Library. Please firstly download a free trial here.
using System; using BC.NetWinBarcodeGeneratorTrial.Qrcode; namespace QRCodeGenerator { class Program { static void Main(string[] args) { // Define the base URL string baseUrl = "https://example.com/page.aspx?table="; // Define the number of QR Codes to generate int numCodes = 10; // Create an instance of the Qrcode class Qrcode qrCode = new Qrcode(); // Set the encoding mode and the error correction level qrCode.SetEncodingMode = QrcodeEncodingMode.Automatic; qrCode.ErrorCorrectionLevel = ErrorCorrectionLevel.H; // Loop through each table and generate a QR Code with the table added to the URL parameters for (int i = 1; i <ss= numCodes; i++) { // Define the table name string tableName = "Table" + i; // Add the table name to the URL string url = baseUrl + tableName; // Set the data to the URL with the table name added qrCode.SetData = url; // Save the QR Code image as a PNG file qrCode.GenerateBarcode(@"C:\qr_code.png"); } Console.WriteLine("QR Codes generated successfully."); } } }
In this C# QR Code generation example, we first define the base URL and the number of QR Codes to generate. We then create an instance of the QRCode class and set the encoding mode and the error correction level. We then loop through each table, generate a QR Code with the table added to the URL parameters, and save the QR Code as a PNG file with a unique filename for each QR Code. Finally, we output a message indicating that the QR Codes were generated successfully.
In addition to generating QR Code barcode images in C#.NET, we also proivde the C#.NET barcode generator for generating QR Code on PDF file pages.
1. Variable assignment: Make sure that the variables used to generate the QR Code (such as the content and filename) are properly assigned and incremented for each QR Code generated.
2. Image caching: Check if the image is being cached, as this could lead to the same image being used for multiple QR Codes. You can try adding a cache-busting parameter to the image URL to ensure that a new image is generated each time.
3. Random number generation: If you are using random numbers or hashes to generate the QR Code filename or content, make sure that the generator is properly seeded to ensure that each generated QR Code is unique.
4. Database connection: Check if there is any issue with the database connection or query, which could be causing the same data to be inserted into multiple rows.
5. Debugging: Use debugging tools to identify any errors or issues with the code, such as incorrect variable values or logic errors.
It would be helpful to review your code and see any error messages or logs to identify the root cause of the issue.