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>
- /// <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;
- }
- }
- }
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