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：
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<%@ 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：
希望本文所述对大家asp.net程序设计有所帮助。
