Use QR Code Image Url[Sample|Source|Documentation] Value in this QR code is "1234567890" Description C1QRCode provides a QR code image which is encoded according to a special string value. Users can use the QR code image directly by following code: if (!IsPostBack) { C1QRCode qrCode = new C1QRCode(); qrCode.Text = "1234567890"; this.Image1.ImageUrl = qrCode.ImageUrl; }