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

本文实例讲述了asp.net(C#)使用QRCode生成图片中心加Logo或图像的二维码。分享给大家供大家参考，具体如下：

<%@ 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/2012921051540.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;
 }
 }
}

运行效果如下图所示：

PS：本站还提供了一个功能十分强悍的在线二维码生成工具，可实现文本、电话号码、短信、邮件、网址等的二维码生成及logo图标添加功能：

在线生成二维码工具(加强版)：
http://tools.jb51.net/transcoding/jb51qrcode

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希望本文所述对大家asp.net程序设计有所帮助。