1  /// <summary>
 2     /// 含有QR码的描述类和包装编码和渲染
 3     /// </summary>
 4     public class QRCodeHelper
 5     {
 6         /// <summary>
 7         /// 获取二维码
 8         /// </summary>
 9         /// <param name="strContent">待编码的字符</param>
10         /// <param name="ms">输出流</param>
11         /// <param name="moduleSize">大小</param>
12         ///<returns>True if the encoding succeeded, false if the content is empty or too large to fit in a QR code</returns>
13         public static bool GetQRCode(string strContent,MemoryStream ms, int moduleSize = 12)
14         {
15             ErrorCorrectionLevel Ecl = ErrorCorrectionLevel.M; //误差校正水平
16             string Content = strContent;//待编码内容
17             QuietZoneModules QuietZones = QuietZoneModules.Two;  //空白区域
18             var encoder = new QrEncoder(Ecl);
19             QrCode qr;
20             if (encoder.TryEncode(Content, out qr))//对内容进行编码，并保存生成的矩阵
21             {
22                 var render = new GraphicsRenderer(new FixedModuleSize(moduleSize, QuietZones));
23                 render.WriteToStream(qr.Matrix, ImageFormat.Png, ms);
24             }
25             else
26             {
27                 return false;
28             }
29             return true;
30         }
31
32     }  

1 using (var ms = new MemoryStream())
2 {
3     string strContent = "http://www.baidu.com";
4     QRCodeHelper.GetQRCode(strContent, ms, 12);
5     Response.ContentType = "image/Png";
6     Response.OutputStream.Write(ms.GetBuffer(), 0, (int)ms.Length);
7     Response.End();
8 }