About Unicode text in barcode
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Most barcode symbologies do not support encode Unicode text directly into barcode symbols. However 2d barcodes (Such as QR Code, Data Matrix, and PDF-417) usually support encoding byte array data message. C# developers could convert Unicode text into byte array, and encode the byte array into barcode symbols.
During decoding barcode image using barcode reader software or device, C# developer could read byte array data from 2d barcode symbols, and decode the byte array into string with Unicode text.
During decoding barcode image using barcode reader software or device, C# developer could read byte array data from 2d barcode symbols, and decode the byte array into string with Unicode text.
How to scan, read Unicode text from 2D barcodes using C#?
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In the following C# source code, we will show you how to read a QR Code barcode image with Unicode text (English, Chinese, and Japanese characters inside).
We will try to read and recognize the Unicode text content from the following QR Code image, which is generated by OnBarcode C# barcode generator library. You can view the C# demo code at How to generate QR Code with Unicode text using C#
The above QR Code encodes the following text message with English, Chinese, and Japanese characters inside
When you run the program, you will find the scanned QR Code data below.
We will try to read and recognize the Unicode text content from the following QR Code image, which is generated by OnBarcode C# barcode generator library. You can view the C# demo code at How to generate QR Code with Unicode text using C#
The above QR Code encodes the following text message with English, Chinese, and Japanese characters inside
- Get all QR Code data from a single image file using C# method BarcodeScanner.ScanInDetails()
- For each QR Code data, get the byte array of the data message using method BarcodeDetail.GetDataBytes()
- Get the Unicode text using UTF8 decoding in method System.Text.Encoding.UTF8.GetString()
string inputFilePath = "W://Projects//Test-Input//csharp-qrcode-unicode-sample.png"; // scan all QR Code symbols in the image file BarcodeDetail[] datas = BarcodeScanner.ScanInDetails(inputFilePath, BarcodeType.QRCode); for (int j = 0; j < datas.Length; j++) { byte[] dataInBytes = datas[j].GetDataBytes(); string textMsgDecoded = System.Text.Encoding.UTF8.GetString(dataInBytes); Console.WriteLine("message: " + textMsgDecoded); }
When you run the program, you will find the scanned QR Code data below.
