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

<%@ 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 name="destImg">粘贴的目标图片 

    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 name="newW">新的宽度 

    /// <param name="newH">新的高度 

    /// <param name="Mode">保留着，暂时未用 

    /// <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;

        }

    }

}