asp.net(C#)使用QRCode生成图片中心加Logo或图像的二维码实例

<%@ 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;    }  }}