C#生成二维码图片

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

 1         /// <summary>
 2         /// 生成二维码图片，并返回文件的保存路径
 3         /// </summary>
 4         /// <param name="nr">要生成二维码的字符串</param>
 5         /// <returns></returns>
 6         private string CreateQR(string nr)
 7         {
 8             Bitmap bt;
 9             if (!string.IsNullOrEmpty(nr))
10             {
11                 string filename = Guid.NewGuid().ToString().ToUpper();
12                 QRCodeEncoder qrCodeEncoder = new QRCodeEncoder();
13                 bt = qrCodeEncoder.Encode(nr, Encoding.UTF8);
14                 string imgPath = Server.MapPath("~/Images/QRcodeImg/") + filename + ".jpg";
15                 try
16                 {
17                     bt.Save(imgPath);
18                     return imgPath;
19                 }
20                 catch (Exception)
21                 {
22                     return "";
23                 }             
24             }
25             else
26             {
27                 return "";
28             }
29         }

 string str =  CreateQR("something");