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   源码介绍

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using System;
using System.Collections.Generic;
using System.Drawing;
using System.IO;
using System.Linq;
using System.Web;
using System.Web.Mvc;
using ThoughtWorks.QRCode.Codec;
using ThoughtWorks.QRCode.Codec.Data;

namespace QRCode.Controllers
{
    public class HomeController : Controller
    {
        //
        // GET: /Home/
        public ActionResult Index()
        {
            return View();
        }

        //生成二维码方法一
        private void CreateCode_Simple(string nr)
        {
            QRCodeEncoder qrCodeEncoder = new QRCodeEncoder();
            qrCodeEncoder.QRCodeEncodeMode = QRCodeEncoder.ENCODE_MODE.BYTE;
            qrCodeEncoder.QRCodeScale = 4;
            qrCodeEncoder.QRCodeVersion = 8;
            qrCodeEncoder.QRCodeErrorCorrect = QRCodeEncoder.ERROR_CORRECTION.M;
            //System.Drawing.Image image = qrCodeEncoder.Encode("4408810820 深圳－广州 小江");
            System.Drawing.Image image = qrCodeEncoder.Encode(nr);
            string filename = DateTime.Now.ToString("yyyymmddhhmmssfff").ToString()   ".jpg";
            string filepath = Server.MapPath(@"~\Upload")   "\\"   filename;
            System.IO.FileStream fs = new System.IO.FileStream(filepath, System.IO.FileMode.OpenOrCreate, System.IO.FileAccess.Write);
            image.Save(fs, System.Drawing.Imaging.ImageFormat.Jpeg);

            fs.Close();
            image.Dispose();
            //二维码解码
            var codeDecoder = CodeDecoder(filepath);
        }

        ////// 生成二维码
        //////要生成的文字或者数字，支持中文。如： "4408810820 深圳－广州" 或者：4444444444///三种尺寸：BYTE ，ALPHA_NUMERIC，NUMERIC///大小：L M Q H///版本：如 8///比例：如 4///public ActionResult CreateCode_Choose(string strData, string qrEncoding, string level, int version, int scale)
        {
            QRCodeEncoder qrCodeEncoder = new QRCodeEncoder();
            string encoding = qrEncoding;
            switch (encoding)
            {
                case "Byte":
                    qrCodeEncoder.QRCodeEncodeMode = QRCodeEncoder.ENCODE_MODE.BYTE;
                    break;
                case "AlphaNumeric":
                    qrCodeEncoder.QRCodeEncodeMode = QRCodeEncoder.ENCODE_MODE.ALPHA_NUMERIC;
                    break;
                case "Numeric":
                    qrCodeEncoder.QRCodeEncodeMode = QRCodeEncoder.ENCODE_MODE.NUMERIC;
                    break;
                default:
                    qrCodeEncoder.QRCodeEncodeMode = QRCodeEncoder.ENCODE_MODE.BYTE;
                    break;
            }

            qrCodeEncoder.QRCodeScale = scale;
            qrCodeEncoder.QRCodeVersion = version;
            switch (level)
            {
                case "L":
                    qrCodeEncoder.QRCodeErrorCorrect = QRCodeEncoder.ERROR_CORRECTION.L;
                    break;
                case "M":
                    qrCodeEncoder.QRCodeErrorCorrect = QRCodeEncoder.ERROR_CORRECTION.M;
                    break;
                case "Q":
                    qrCodeEncoder.QRCodeErrorCorrect = QRCodeEncoder.ERROR_CORRECTION.Q;
                    break;
                default:
                    qrCodeEncoder.QRCodeErrorCorrect = QRCodeEncoder.ERROR_CORRECTION.H;
                    break;
            }
            //文字生成图片
            Image image = qrCodeEncoder.Encode(strData);
            string filename = DateTime.Now.ToString("yyyymmddhhmmssfff").ToString()   ".jpg";
            string filepath = Server.MapPath(@"~\Upload")   "\\"   filename;
            //如果文件夹不存在，则创建
            //if (!Directory.Exists(filepath))
            //    Directory.CreateDirectory(filepath);
            System.IO.FileStream fs = new System.IO.FileStream(filepath, System.IO.FileMode.OpenOrCreate, System.IO.FileAccess.Write);
            image.Save(fs, System.Drawing.Imaging.ImageFormat.Jpeg);
            fs.Close();
            image.Dispose();
            return Content(@"/Upload/"   filename);
        }

        ////// 二维码解码
        //////图片路径///public string CodeDecoder(string filePath)
        {
            if (!System.IO.File.Exists(filePath))
                return null;
            Bitmap myBitmap = new Bitmap(Image.FromFile(filePath));
            QRCodeDecoder decoder = new QRCodeDecoder();
            string decodedString = decoder.decode(new QRCodeBitmapImage(myBitmap));
            return decodedString;
        }
    }
}