1. using System;  
2. using System.Collections.Generic;  
3. using System.ComponentModel;  
4. using System.Data;  
5. using System.Drawing;  
6. using System.Linq;  
7. using System.Text;  
8. using System.Windows.Forms;  
9.   
10. using System.Collections;  
11. using com.google.zxing;//需要从网上下载  
12. using System.Text.RegularExpressions;  
13. using ByteMatrix = com.google.zxing.common.ByteMatrix;  
14.   
15. namespace 二维码  
16. {  
17.     public partial class Form1 : Form  
18.     {  
19.         public Form1()  
20.         {  
21.             InitializeComponent();  
22.         }  
23.         //生成条形码  
24.         private void button1_Click(object sender, EventArgs e)  
25.         {  
26.             Regex rg = new Regex("^[0-9]{13}$");  
27.             if (!rg.IsMatch(textBox1.Text))  
28.             {  
29.                 MessageBox.Show("本例子采用EAN_13编码，需要输入13位数字");  
30.                 return;  
31.             }  
32.   
33.             try  
34.             {  
35.                 MultiFormatWriter mutiWriter = new com.google.zxing.MultiFormatWriter();  
36.                 ByteMatrix bm = mutiWriter.encode(textBox1.Text, com.google.zxing.BarcodeFormat.EAN_13, 363, 150);  
37.                 Bitmap img = bm.ToBitmap();  
38.                 pictureBox1.Image = img;  
39.   
40.                 //自动保存图片到当前目录  
41.                 string filename = System.Environment.CurrentDirectory + "\\EAN_13" + DateTime.Now.Ticks.ToString() + ".jpg";  
42.                 img.Save(filename, System.Drawing.Imaging.ImageFormat.Jpeg);  
43.                 label2.Text = "图片已保存到：" + filename;  
44.             }  
45.             catch (Exception ee)  
46.             {   
47.                 MessageBox.Show(ee.Message);  
48.             }  
49.         }  
50.   
51.         //生成二维码  
52.         private void button2_Click(object sender, EventArgs e)  
53.         {  
54.             try  
55.             {  
56.                 MultiFormatWriter mutiWriter = new com.google.zxing.MultiFormatWriter();  
57.                 ByteMatrix bm = mutiWriter.encode(textBox1.Text, com.google.zxing.BarcodeFormat.QR_CODE, 300, 300);  
58.                 Bitmap img = bm.ToBitmap();  
59.                 pictureBox1.Image = img;  
60.                 string filename = System.Environment.CurrentDirectory + "\\QR" + DateTime.Now.Ticks.ToString() + ".jpg";  
61.                 img.Save(filename, System.Drawing.Imaging.ImageFormat.Jpeg);  
62.                 label2.Text = "图片已保存到：" + filename;  
63.   
64.             }  
65.             catch (Exception ee)  
66.             {   
67.                 MessageBox.Show(ee.Message);   
68.             }  
69.         }  
70.   
71.         //生成带图片的二维码  
72.         private void button3_Click(object sender, EventArgs e)  
73.         {  
74.             try  
75.             {  
76.                 MultiFormatWriter mutiWriter = new com.google.zxing.MultiFormatWriter();  
77.                 Hashtable hint = new Hashtable();  
78.                 hint.Add(EncodeHintType.CHARACTER_SET, "UTF-8");  
79.                 hint.Add(EncodeHintType.ERROR_CORRECTION, com.google.zxing.qrcode.decoder.ErrorCorrectionLevel.H);  
80.                 ByteMatrix bm = mutiWriter.encode(textBox1.Text, com.google.zxing.BarcodeFormat.QR_CODE, 300, 300, hint);  
81.                 Bitmap img = bm.ToBitmap();  
82.                 Image middlImg = QRMiddleImg.Image;  
83.                 System.Drawing.Size realSize = mutiWriter.GetEncodeSize(textBox1.Text, com.google.zxing.BarcodeFormat.QR_CODE, 300, 300);  
84.                 //计算插入图片的大小和位置  
85.                 int middleImgW = Math.Min((int)(realSize.Width / 3.5), middlImg.Width);  
86.                 int middleImgH = Math.Min((int)(realSize.Height / 3.5), middlImg.Height);  
87.                 int middleImgL = (img.Width - middleImgW) / 2;  
88.                 int middleImgT = (img.Height - middleImgH) / 2;  
89.   
90.                 //将img转换成bmp格式，否则后面无法创建 Graphics对象  
91.                 Bitmap bmpimg = new Bitmap(img.Width, img.Height, System.Drawing.Imaging.PixelFormat.Format32bppArgb);  
92.                 using (Graphics g = Graphics.FromImage(bmpimg))  
93.                 {  
94.                     g.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.HighQualityBicubic;  
95.                     g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;  
96.                     g.CompositingQuality = System.Drawing.Drawing2D.CompositingQuality.HighQuality;  
97.                     g.DrawImage(img, 0, 0);  
98.                 }  
99.   
100.                 //在二维码中插入图片  
101.                 System.Drawing.Graphics MyGraphic = System.Drawing.Graphics.FromImage(bmpimg);  
102.                 //白底  
103.                 MyGraphic.FillRectangle(Brushes.White, middleImgL, middleImgT, middleImgW, middleImgH);  
104.                 MyGraphic.DrawImage(middlImg, middleImgL, middleImgT, middleImgW, middleImgH);  
105.   
106.                 pictureBox1.Image = bmpimg;  
107.   
108.                 //自动保存图片到当前目录  
109.                 string filename = System.Environment.CurrentDirectory + "\\QR" + DateTime.Now.Ticks.ToString() + ".jpg";  
110.                 bmpimg.Save(filename, System.Drawing.Imaging.ImageFormat.Jpeg);  
111.                 label2.Text = "图片已保存到：" + filename;  
112.   
113.             }  
114.             catch (Exception ee)  
115.             {   
116.                 MessageBox.Show(ee.Message);   
117.             }  
118.         }  
119.   
120.         string opFilePath = "";  
121.         //选择要生成的中间图片  
122.         private void pictureBox2_Click(object sender, EventArgs e)  
123.         {  
124.             openFileDialog1.Filter = "图片文件|*.bmp;*.jpg;*.png;*.ico";  
125.             if (openFileDialog1.ShowDialog() == DialogResult.OK)  
126.             {  
127.                 opFilePath = openFileDialog1.FileName;  
128.                 Image img = Image.FromFile(opFilePath);  
129.                 QRMiddleImg.Image = img;  
130.             }  
131.         }  
132.   
133.         //选择要解码的图片  
134.         private void button4_Click(object sender, EventArgs e)  
135.         {  
136.             openFileDialog1.Filter = "图片文件|*.bmp;*.jpg;*.png;*.ico";  
137.             if (openFileDialog1.ShowDialog() == DialogResult.OK)  
138.             {  
139.                 opFilePath = openFileDialog1.FileName;  
140.                 pictureBox2.ImageLocation = opFilePath;  
141.             }  
142.         }  
143.   
144.         //解码二维码  
145.         private void button5_Click(object sender, EventArgs e)  
146.         {  
147.             MultiFormatReader mutiReader = new com.google.zxing.MultiFormatReader();  
148.             Bitmap img = (Bitmap)Bitmap.FromFile(opFilePath);  
149.             if (img == null)  
150.                 return;  
151.             LuminanceSource ls = new RGBLuminanceSource(img, img.Width, img.Height);  
152.             BinaryBitmap bb = new BinaryBitmap(new com.google.zxing.common.HybridBinarizer(ls));  
153.             //注意  必须是Utf-8编码  
154.             Hashtable hints = new Hashtable();  
155.             hints.Add(EncodeHintType.CHARACTER_SET, "UTF-8");  
156.             Result r = mutiReader.decode(bb, hints);  
157.             richTextBox1.Text = r.Text;  
158.         }  
159.     }  
160. }  

C#如何生成二维码详解（含解码）