How to generate QR code in visual studio 2008,asp.net

Question

How to generate QR code in visual studio 2008,asp.net. Means How to add Library For QRCODER

Leon D · Answer

You can use Free Spire.Barcode. https://www.e-iceblue.com/Introduce/barcode-for-net-introduce.html using Spire.Barcode; using System.Drawing; namespace QRCode { class Program { static void Main(string[] args) { BarcodeSettings settings = new BarcodeSettings(); settings.Type = BarCodeType.QRCode; settings.Data = "Hello 123456789"; settings.Data2D = "Hello 123456789"; settings.QRCodeDataMode = QRCodeDataMode.AlphaNumber; settings.X = 1.0f; settings.QRCodeECL = QRCodeECL.H; BarCodeGenerator generator = new BarCodeGenerator(settings); Image image = generator.GenerateImage(); image.Save("QRCode.png"); } } }

Amit Mohanty · Answer

Try to add attached dll in your project.

Sandeep Kumar · Answer

i have all ready done this still same error .net 3.5

Amit Mohanty · Answer

The usage of QRCoder first you must add refernece to the QRCoder.dll. How to add reference: First you right-click on the “ references ” label in the Solution Explorer and click in the context menu on “ Add reference ”. Now click on the “ Browse ” button, select the .dll and confirm your selection by clicking on the “ Ok ” button. Or check the link: https://www.c-sharpcorner.com/UploadFile/1e050f/creating-and-using-dll-class-library-in-C-Sharp/

Sandeep Kumar · Answer

When I Store In Bin Folder DLL FILE THEN ERRO SHOWING Error 4 Could not load file or assembly 'QRCoder' or one of its dependencies. This assembly is built by a runtime newer than the currently loaded runtime and cannot be loaded.

Amit Mohanty · Answer

You can use QRCoder, download QRCoder.dll add to Your project. Here is sample tutorial how use it. https://www.aspsnippets.com/Articles/Dynamically-generate-and-display-QR-code-Image-in-ASPNet.aspx string code = "Your text"; QRCodeGenerator qrGenerator = new QRCodeGenerator(); QRCodeGenerator.QRCode qrCode = qrGenerator.CreateQrCode(code, QRCodeGenerator.ECCLevel.Q); System.Web.UI.WebControls.Image imgBarCode = new System.Web.UI.WebControls.Image(); imgBarCode.Height = 150; imgBarCode.Width = 150; using (Bitmap bitMap = qrCode.GetGraphic(20)) { using (MemoryStream ms = new MemoryStream()) { bitMap.Save(ms, System.Drawing.Imaging.ImageFormat.Png); byte[] byteImage = ms.ToArray(); imgBarCode.ImageUrl = "data:image/png;base64," + Convert.ToBase64String(byteImage); } plBarCode.Controls.Add(imgBarCode); }