QrCode生成二维码

引用类库Gma.QrCodeNet.EnCodeing

主要代码：

CreateQrCode类

1 using System;
2 using System.Collections.Generic;
3 using System.Linq;
4
5 namespace _2DCodeCA
6 {
7     using System.IO;
8     using Gma.QrCodeNet.Encoding;
9     using Gma.QrCodeNet.Encoding.Windows.Render;
10     using System.Drawing.Imaging;
11     using System.Drawing;
12     using System.Drawing.Drawing2D;
13     public class CreateQrCode
14     {
15         public Image Create(string text)
16         {
17             QrCode code;
18             QrEncoder encoder = new QrEncoder(ErrorCorrectionLevel.H);
19             Image img = null;
20             if (encoder.TryEncode(text, out code))
21             {
22                 var render = new GraphicsRenderer(new FixedModuleSize(5, QuietZoneModules.Two));
23                 using (MemoryStream ms = new MemoryStream())
24                 {
25                     render.WriteToStream(code.Matrix, ImageFormat.Png, ms);
26                     img = Image.FromStream(ms);
27                 }
28             }
29             return img;
30         }
31
32         public Image ReviceImage(Image img, int nWidth, int nHeight)
33         {
34             Image b = new Bitmap(nWidth, nHeight);
35             using (Graphics graphics = Graphics.FromImage(b))
36             {
37
38                 graphics.InterpolationMode = InterpolationMode.HighQualityBicubic;
39                 graphics.DrawImage(img, new Rectangle(0, 0, nWidth, nHeight), new Rectangle(0, 0, img.Width, img.Height), GraphicsUnit.Pixel);
40             }
41             return img;
42         }
43
44         public Image Create(string text, string logoPath)
45         {
46             Image imgLogo = Image.FromFile(logoPath);
47             Image img=Create(text);
48             if (imgLogo.Width != 65 || imgLogo.Height != 65)
49             {
50                 imgLogo = ReviceImage(imgLogo, 65, 65);
51             }
52             Graphics graphics = Graphics.FromImage(img);
53             graphics.DrawImage(imgLogo, img.Width / 2 - imgLogo.Width / 2, img.Width / 2 - imgLogo.Width / 2, imgLogo.Width, imgLogo.Height);
54             return img;
55         }
56     }
57 }

界面代码:

1 private void btnCreate_Click(object sender, EventArgs e)
2         {
3             string str = "姓名：" + txtName.Text + "\n号码：" + txtPhone.Text + "\n性别：" + txtSex.Text;
4             CreateQrCode create=new CreateQrCode();
5             if (string.IsNullOrWhiteSpace(txtPath.Text))
6             {
7                 img2DCode.Image = create.Create(str);
8             }
9             else
10             {
11                 img2DCode.Image = create.Create(str, txtPath.Text);
12             }
13
14         }
15
16         private void btnPath_Click(object sender, EventArgs e)
17         {
18             OpenFileDialog open = new OpenFileDialog();
19             open.ShowDialog();
20             txtPath.Text = open.FileName;
21         }

效果图:

文章引用:http://www.tuicool.com/articles/f6ruei

类库下载:http://www.qrcode-generator.com/

转载于:https://www.cnblogs.com/CymbidiumSky/p/4946416.html