C#如何生成二維碼詳解（含解碼）

C#如何生成二維碼詳解（含解碼）

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;
10. using System.Collections;
11. using com.google.zxing;//需要從網上下載
12. using System.Text.RegularExpressions;
13. using ByteMatrix = com.google.zxing.common.ByteMatrix;
15. namespace 二維碼
16. {
17. public partial class Form1 : Form
18. {
19. public Form1()
20. {
21. InitializeComponent();
22. }
23. //生成條形碼
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編碼，需要輸入13位數字");
30. return;
31. }
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;
40. //自動保存圖片到當前目錄
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 = "圖片已保存到：" + filename;
44. }
45. catch (Exception ee)
46. {
47. MessageBox.Show(ee.Message);
48. }
49. }
51. //生成二維碼
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 = "圖片已保存到：" + filename;
64. }
65. catch (Exception ee)
66. {
67. MessageBox.Show(ee.Message);
68. }
69. }
71. //生成帶圖片的二維碼
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. //計算插入圖片的大小和位置
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;
90. //將img轉換成bmp格式，否則後面無法創建 Graphics對象
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. }
100. //在二維碼中插入圖片
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);
106. pictureBox1.Image = bmpimg;
108. //自動保存圖片到當前目錄
109. string filename = System.Environment.CurrentDirectory + "\\QR" + DateTime.Now.Ticks.ToString() + ".jpg";
110. bmpimg.Save(filename, System.Drawing.Imaging.ImageFormat.Jpeg);
111. label2.Text = "圖片已保存到：" + filename;
113. }
114. catch (Exception ee)
115. {
116. MessageBox.Show(ee.Message);
117. }
118. }
120. string opFilePath = "";
121. //選擇要生成的中間圖片
122. private void pictureBox2_Click(object sender, EventArgs e)
123. {
124. openFileDialog1.Filter = "圖片文件|*.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. }
133. //選擇要解碼的圖片
134. private void button4_Click(object sender, EventArgs e)
135. {
136. openFileDialog1.Filter = "圖片文件|*.bmp;*.jpg;*.png;*.ico";
137. if (openFileDialog1.ShowDialog() == DialogResult.OK)
138. {
139. opFilePath = openFileDialog1.FileName;
140. pictureBox2.ImageLocation = opFilePath;
141. }
142. }
144. //解碼二維碼
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 必須是Utf-8編碼
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. }