asp.net(C#)利用QRCode生成二维码(续)

1<%@ WebHandler Language="C#" Class="GetQRCode" %>
2
3using System;
4using System.Web;
5
6using ThoughtWorks.QRCode.Codec;
7using ThoughtWorks.QRCode.Codec.Data;
8using ThoughtWorks.QRCode.Codec.Util;
9using System.IO;
10using System.Text;
11using System.Drawing;
12using System.Drawing.Drawing2D;
13
14public class GetQRCode : IHttpHandler
15{
16
17    public void ProcessRequest(HttpContext context)
18    {
19
20        String data = context.Request["CodeText"];
21        if (!string.IsNullOrEmpty(data))
22        {
23            QRCodeEncoder qrCodeEncoder = new QRCodeEncoder();
24            qrCodeEncoder.QRCodeEncodeMode = QRCodeEncoder.ENCODE_MODE.BYTE;
25            qrCodeEncoder.QRCodeScale = 4;
26            qrCodeEncoder.QRCodeVersion = 8;
27            qrCodeEncoder.QRCodeErrorCorrect = QRCodeEncoder.ERROR_CORRECTION.M;
28            System.Drawing.Image image = qrCodeEncoder.Encode(data);
29            System.IO.MemoryStream MStream = new System.IO.MemoryStream();
30            image.Save(MStream, System.Drawing.Imaging.ImageFormat.Png);
31
32            System.IO.MemoryStream MStream1 = new System.IO.MemoryStream();
33            CombinImage(image, context.Server.MapPath("~/images/201292891051540.jpg")).Save(MStream1, System.Drawing.Imaging.ImageFormat.Png);
34            context.Response.ClearContent();
35            context.Response.ContentType = "image/png";
36            context.Response.BinaryWrite(MStream1.ToArray());
37
38            //image.Dispose();
39            MStream.Dispose();
40            MStream1.Dispose();
41        }
42
43        context.Response.Flush();
44        context.Response.End();
45    }
46
47    /// <summary>  
48    /// 调用此函数后使此两种图片合并，类似相册，有个  
49    /// 背景图，中间贴自己的目标图片  
50    /// </summary>  
51    /// <param name="imgBack">粘贴的源图片</param>  
52    /// <param name="destImg">粘贴的目标图片</param>  
53    public static Image CombinImage(Image imgBack, string destImg)
54    {
55        Image img = Image.FromFile(destImg);        //照片图片    
56        if (img.Height != 65 || img.Width != 65)
57        {
58            img = KiResizeImage(img, 65, 65, 0);
59        }
60        Graphics g = Graphics.FromImage(imgBack);
61
62        g.DrawImage(imgBack, 0, 0, imgBack.Width, imgBack.Height);      //g.DrawImage(imgBack, 0, 0, 相框宽, 相框高);   
63
64        //g.FillRectangle(System.Drawing.Brushes.White, imgBack.Width / 2 - img.Width / 2 - 1, imgBack.Width / 2 - img.Width / 2 - 1,1,1);//相片四周刷一层黑色边框  
65
66        //g.DrawImage(img, 照片与相框的左边距, 照片与相框的上边距, 照片宽, 照片高);  
67
68        g.DrawImage(img, imgBack.Width / 2 - img.Width / 2, imgBack.Width / 2 - img.Width / 2, img.Width, img.Height);
69        GC.Collect();
70        return imgBack;
71    }
72
73
74    /// <summary>  
75    /// Resize图片  
76    /// </summary>  
77    /// <param name="bmp">原始Bitmap</param>  
78    /// <param name="newW">新的宽度</param>  
79    /// <param name="newH">新的高度</param>  
80    /// <param name="Mode">保留着，暂时未用</param>  
81    /// <returns>处理以后的图片</returns>  
82    public static Image KiResizeImage(Image bmp, int newW, int newH, int Mode)
83    {
84        try
85        {
86            Image b = new Bitmap(newW, newH);
87            Graphics g = Graphics.FromImage(b);
88            // 插值算法的质量  
89            g.InterpolationMode = InterpolationMode.HighQualityBicubic;
90            g.DrawImage(bmp, new Rectangle(0, 0, newW, newH), new Rectangle(0, 0, bmp.Width, bmp.Height), GraphicsUnit.Pixel);
91            g.Dispose();
92            return b;
93        }
94        catch
95        {
96            return null;
97        }
98    }
99
100    public bool IsReusable
101    {
102        get
103        {
104            return false;
105        }
106    }
107}

效果如下