二维码生成

public enum ENCODE_MODE  //编码模式（我自己的理解，以下类同）

        {
            ALPHA_NUMERIC,
            NUMERIC,
            BYTE
        }
 
        public enum ERROR_CORRECTION  //（误差校正级别）
        {
            L,
            M,
            Q,
            H
        }

 1 public ErWeiMa()
 2         {
 3             _QRCode = new QRCodeEncoder();
 4             _QRCode.QRCodeEncodeMode = QRCodeEncoder.ENCODE_MODE.BYTE;
 5             _QRCode.QRCodeErrorCorrect = QRCodeEncoder.ERROR_CORRECTION.M;
 6             _QRCode.QRCodeScale = 4;
 7 
 8             encoding = Encoding.UTF8;
 9         }
10 
11 
12  /// <summary>
13         /// 获取二维码图像base64字符串，可直接赋值给img对象的src显示
14         /// 默认编码UTF8，QRCodeEncoder默认值为Unicode
15         /// </summary>
16         /// <param name="content">编码内容</param>
17         /// <returns>二维码图像base64字符串</returns>
18         public string Encode(string content)
19         {
20             this.InitVersion(content);
21             using(var ms = new MemoryStream())
22             using (Bitmap image = _QRCode.Encode(content, encoding))
23             {
24                 image.Save(ms, System.Drawing.Imaging.ImageFormat.Jpeg);
25                 return "data:image/jpeg;base64,"+ Convert.ToBase64String(ms.ToArray());
26             }
27         }
28         /// <summary>
29         /// 获取二维码图像base64字符串，可直接赋值给img对象的src显示
30         /// </summary>
31         /// <param name="content">编码内容</param>
32         /// <param name="encoding">编码类型</param>
33         /// <returns>二维码图像base64字符串</returns>
34         public string Encode(string content,Encoding encoding)
35         {
36             this.encoding = encoding;
37             this.InitVersion(content);
38             using (var ms = new MemoryStream())
39             using (Bitmap image = _QRCode.Encode(content, encoding))
40             {
41                 image.Save(ms, System.Drawing.Imaging.ImageFormat.Jpeg);
42                 return "data:image/jpeg;base64," + Convert.ToBase64String(ms.ToArray());
43             }
44         }

1 ErWeiMa.ErWeiMa er = new ErWeiMa.ErWeiMa();
2  this.img1.Src = er.Encode("中国");