How to split data to text boxes when read qr code data ?

[4x2y]

Try this

            // QR is a string contains QR reader output
            string[] lines = QR.Split(new string[] { Environment.NewLine }, StringSplitOptions.None);
            textBox1.Text = lines[1].Substring(lines[1].IndexOf(":") + 1);
            textBox2.Text = lines[2].Substring(lines[2].IndexOf(":") + 1);
            textBox3.Text = lines[3].Substring(lines[3].IndexOf(":") + 1);