ASP. NET (C #) uses QRCode to generate a QR code (cont.)-Add a logo or image to the image center of the QR code.

2. <%@ WebHandler language="C #" class="Getqrcode"%>
6. Using System;
8. Using System.Web;
12. Using ThoughtWorks.QRCode.Codec;
14. Using ThoughtWorks.QRCode.Codec.Data;
16. Using ThoughtWorks.QRCode.Codec.Util;
18. Using System.IO;
20. Using System.Text;
22. Using System.Drawing;
24. Using System.Drawing.Drawing2D;
28. Public class Getqrcode:ihttphandler
30. {
34. public void ProcessRequest (HttpContext context)
36. {
40. String data = context.  request["Codetext"];
42. if (! String. IsNullOrEmpty (data))
44. {
46. Qrcodeencoder Qrcodeencoder = new Qrcodeencoder ();
48. Qrcodeencoder.qrcodeencodemode = Qrcodeencoder.encode_mode. BYTE;
50. Qrcodeencoder.qrcodescale = 4;
52. Qrcodeencoder.qrcodeversion = 8;
54. Qrcodeencoder.qrcodeerrorcorrect = qrcodeencoder.error_correction. M
56. System.Drawing.Image Image = qrcodeencoder.encode (data);
58. System.IO.MemoryStream Mstream = new System.IO.MemoryStream ();
60. Image. Save (Mstream, System.Drawing.Imaging.ImageFormat.Png);
64. System.IO.MemoryStream MStream1 = new System.IO.MemoryStream ();
66. Combinimage (image, context. Server.MapPath ("~/images/201292891051540.jpg")).  Save (MStream1, System.Drawing.Imaging.ImageFormat.Png);
68. Context. Response.clearcontent ();
70. Context.  Response.ContentType = "Image/png";
72. Context. Response.BinaryWrite (Mstream1.toarray ());
76. //image.   Dispose ();
78. Mstream.dispose ();
80. Mstream1.dispose ();
82. }
86. Context. Response.Flush ();
88. Context. Response.End ();
90. }
94. // <summary>
96. //// Call this function to merge the two pictures, like the album, there is a
98. /// background map, paste your own target image in the middle
100. // </summary>
102. /// <param name= "Imgback" > Paste the source picture </param>
104. /// <param name= "destimg" > pasted target picture </param>
106. public static image combinimage (image imgback, string destimg)
108. {
110. Image img = image.fromfile (destimg); //Photo gallery
112. if (img. Height! = 65 | | Img. Width! =)
114. {
116. img = Kiresizeimage (IMG, 65, 65, 0);
118. }
120. Graphics g = graphics.fromimage (Imgback);
124. G.drawimage (imgback, 0, 0, imgback.width, imgback.height);      //g.drawimage (imgback, 0, 0, frame width, frame height);
128. //g.fillrectangle (System.Drawing.Brushes.White, IMGBACK.WIDTH/2-img. WIDTH/2-1, IMGBACK.WIDTH/2-img. WIDTH/2-1,1,1);//paint a black border around the photo
132. //g.drawimage (img, photo with picture frame on the left margin, photo with frame top margin, photo width, photo high);
136. G.drawimage (IMG, IMGBACK.WIDTH/2-img. WIDTH/2, Imgback.width/2-img. WIDTH/2, IMG. Width, IMG. Height);
138. Gc. Collect ();
140. return imgback;
142. }
148. // <summary>
150. /// Resize Pictures
152. // </summary>
154. /// <param name= "BMP" > Original bitmap</param>
156. /// <param name= "NEWW" > New width </param>
158. /// <param name= "NEWH" > New heights </param>
160. /// <param name= "Mode" > reserved, temporarily unused </param>
162. /// <returns> pictures after processing </returns>
164. public static image kiresizeimage (image bmp, int neww, int newh, int Mode)
166. {
168. Try
170. {
172. Image B = new Bitmap (NEWW, NEWH);
174. Graphics g = graphics.fromimage (b);
176. the quality of the//interpolation algorithm
178. G.interpolationmode = Interpolationmode.highqualitybicubic;
180. G.drawimage (BMP, new Rectangle (0, 0, NEWW, NEWH), new Rectangle (0, 0, BMP. Width, BMP.  Height), GraphicsUnit.Pixel);
182. G.dispose ();
184. return B;
186. }
188. Catch
190. {
192. return null;
194. }
196. }
200. public bool IsReusable
202. {
204. Get
206. {
208. return false;
210. }
212. }
214. }