asp.net(C#)利用QRCode生成二维码(续)-在二维码图片中心加Logo或图像

来源：互联网发布：网络导航编辑：程序博客网时间：2024/05/14 10:00
    <%@ WebHandler Language="C#" Class="GetQRCode" %>            using System;      using System.Web;            using ThoughtWorks.QRCode.Codec;      using ThoughtWorks.QRCode.Codec.Data;      using ThoughtWorks.QRCode.Codec.Util;      using System.IO;      using System.Text;      using System.Drawing;      using System.Drawing.Drawing2D;            public class GetQRCode : IHttpHandler      {                public void ProcessRequest(HttpContext context)          {                    String data = context.Request["CodeText"];              if (!string.IsNullOrEmpty(data))              {                  QRCodeEncoder qrCodeEncoder = new QRCodeEncoder();                  qrCodeEncoder.QRCodeEncodeMode = QRCodeEncoder.ENCODE_MODE.BYTE;                  qrCodeEncoder.QRCodeScale = 4;                  qrCodeEncoder.QRCodeVersion = 8;                  qrCodeEncoder.QRCodeErrorCorrect = QRCodeEncoder.ERROR_CORRECTION.M;                  System.Drawing.Image image = qrCodeEncoder.Encode(data);                  System.IO.MemoryStream MStream = new System.IO.MemoryStream();                  image.Save(MStream, System.Drawing.Imaging.ImageFormat.Png);                        System.IO.MemoryStream MStream1 = new System.IO.MemoryStream();                  CombinImage(image, context.Server.MapPath("~/images/201292891051540.jpg")).Save(MStream1, System.Drawing.Imaging.ImageFormat.Png);                  context.Response.ClearContent();                  context.Response.ContentType = "image/png";                  context.Response.BinaryWrite(MStream1.ToArray());                        //image.Dispose();                  MStream.Dispose();                  MStream1.Dispose();              }                    context.Response.Flush();              context.Response.End();          }                /// <summary>            /// 调用此函数后使此两种图片合并，类似相册，有个            /// 背景图，中间贴自己的目标图片            /// </summary>            /// <param name="imgBack">粘贴的源图片</param>            /// <param name="destImg">粘贴的目标图片</param>            public static Image CombinImage(Image imgBack, string destImg)          {              Image img = Image.FromFile(destImg);        //照片图片                  if (img.Height != 65 || img.Width != 65)              {                  img = KiResizeImage(img, 65, 65, 0);              }              Graphics g = Graphics.FromImage(imgBack);                    g.DrawImage(imgBack, 0, 0, imgBack.Width, imgBack.Height);      //g.DrawImage(imgBack, 0, 0, 相框宽, 相框高);                       //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                      //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);                      g.DrawImage(img, imgBack.Width / 2 - img.Width / 2, imgBack.Width / 2 - img.Width / 2, img.Width, img.Height);              GC.Collect();              return imgBack;          }                      /// <summary>            /// Resize图片            /// </summary>            /// <param name="bmp">原始Bitmap</param>            /// <param name="newW">新的宽度</param>            /// <param name="newH">新的高度</param>            /// <param name="Mode">保留着，暂时未用</param>            /// <returns>处理以后的图片</returns>            public static Image KiResizeImage(Image bmp, int newW, int newH, int Mode)          {              try              {                  Image b = new Bitmap(newW, newH);                  Graphics g = Graphics.FromImage(b);                  // 插值算法的质量                    g.InterpolationMode = InterpolationMode.HighQualityBicubic;                  g.DrawImage(bmp, new Rectangle(0, 0, newW, newH), new Rectangle(0, 0, bmp.Width, bmp.Height), GraphicsUnit.Pixel);                  g.Dispose();                  return b;              }              catch              {                  return null;              }          }                public bool IsReusable          {              get              {                  return false;              }          }      }
效果如下
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