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/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;
}
}
}
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。
