Qr code Generator with c#

QR code (abbreviated from Quick Response Code) is first designed for the  automotive industry in Japan. A barcode is a machine-readable optical label that contains information about the item to which it is attached. A QR code uses four standardized encoding modes (numeric, alphanumeric, byte / binary) to efficiently store data.

      I am going to show how to encode and decode a message in QR code by using the qr code library. The qr code library provides a pre-defined functions to encode and decode a message. Moreover the qr code library contains binaries for developing windows form applications, asp .Net web application and windows phone application also.

Now I am going to show the demo of qr code generation process by using simple windows form application

Input (Encode tab):

Output (Decode tab):

Encode Source Code:

 private void button1_Click(object sender, EventArgs e)
        {
            string errorType = comboBox2.SelectedText;
            //select the error correction level
            if (errorType == "Low")
            {
                encoder.ErrorCorrectionLevel = ErrorCorrectionLevel.L;
            }
            else if (errorType == "Medium Low")
            {
                encoder.ErrorCorrectionLevel = ErrorCorrectionLevel.M;
            }
            else if (errorType == "Medium High") 
            {
                encoder.ErrorCorrectionLevel = ErrorCorrectionLevel.Q;
            }
            else if (errorType == "High")
            {
                encoder.ErrorCorrectionLevel = ErrorCorrectionLevel.H;
            }
            //set the width and height for the qr code
            encoder.Width = Int32.Parse(txtwidth.Text);
            encoder.Height=Int32.Parse(txtheight.Text);
            pictureBox1.Image = encoder.Encode(BarcodeFormat.QRCode, textBox1.Text);
        }

Decode Source Code:
 
private void button4_Click(object sender, EventArgs e)
        {
            Dictionary<DecodeOptions, object> decodingOptions = new Dictionary<DecodeOptions, object>(); 
           //add the decoding options
            decodingOptions.Add(DecodeOptions.AutoRotate, true);
            //load the qr code into bitmap
            Bitmap bmp = new Bitmap(textBox4.Text);
            Result result = decoder.Decode(bmp, decodingOptions);
            if (result != null)
            {
                textBox2.Text = result.Text;
            }

        }

Download the complete source code from here.

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Happy coding !!!