C # Generate two-dimensional code images

Use C # to generate a two-dimensional code picture and save it to the specified directory.

1. Add a reference to the generated QR code picture DLL:

: Http://files.cnblogs.com/files/zflsyn/ThoughtWorks.QRCode.zip

2. Referencing namespaces

1 using System.Text; 2 using System.Drawing; 3 using ThoughtWorks; 4 using Thoughtworks.qrcode; 5 using ThoughtWorks.QRCode.Codec;

3. Add a method to create a two-dimensional code image

1         /// <summary>2         ///generate a QR code image and return the file's save path3         /// </summary>4         /// <param name= "nr" >a string to generate a two-dimensional code</param>5         /// <returns></returns>6         Private stringCREATEQR (stringnr)7         {8 Bitmap bt;9             if(!string. IsNullOrEmpty (NR))Ten             { One                 stringfilename =Guid.NewGuid (). ToString (). ToUpper (); AQrcodeencoder Qrcodeencoder =NewQrcodeencoder (); -BT =Qrcodeencoder.encode (NR, Encoding.UTF8); -                 stringImgpath = Server.MapPath ("~/images/qrcodeimg/") + filename +". jpg"; the                 Try -                 { - BT. Save (Imgpath); -                     returnImgpath; +                 } -                 Catch(Exception) +                 { A                     return ""; at                 }              -             } -             Else -             { -                 return ""; -             } in}

4. Use this method

string str =  CREATEQR ("something");

C # Generate two-dimensional code images