1.下载ThoughtWorks.QRCode引用并添加在工程中
2.在实现类QRCodeEncoderDemo中引入Dll，添加方法
using System;using System.Collections.Generic;using System.Drawing;using System.Drawing.Drawing2D;using System.Linq;using System.Web;using ThoughtWorks.QRCode;using ThoughtWorks.QRCode.Codec;namespace WebApplication3{ public class QRCodeEncoderDemo { /// <summary> /// 生成二维码. /// </summary> /// <param name="data">需要添加进去的文本</param> /// <returns></returns> public System.Drawing.Image GCode(String data) { QRCodeEncoder qrCodeEncoder = new QRCodeEncoder(); qrCodeEncoder.QRCodeEncodeMode = QRCodeEncoder.ENCODE_MODE.BYTE; qrCodeEncoder.QRCodeScale = 5; qrCodeEncoder.QRCodeVersion = 7; qrCodeEncoder.QRCodeErrorCorrect = QRCodeEncoder.ERROR_CORRECTION.L; var pbImg = qrCodeEncoder.Encode(data, System.Text.Encoding.UTF8); var width = pbImg.Width / 10; var dwidth = width * 2; Bitmap bmp = new Bitmap(pbImg.Width + dwidth, pbImg.Height + dwidth); Graphics g = Graphics.FromImage(bmp); var c = System.Drawing.Color.White; g.FillRectangle(new SolidBrush(c), 0, 0, pbImg.Width + dwidth, pbImg.Height + dwidth); g.DrawImage(pbImg, width, width); g.Dispose(); return bmp; } /// <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="sourceImg">粘贴的源图片</param> /// <param name="destImg">粘贴的目标图片</param> public static System.Drawing.Image CombinImage(System.Drawing.Image imgBack, string destImg) { System.Drawing.Image img = System.Drawing.Image.FromFile(destImg); //照片图片 if (img.Height != 50 || img.Width != 50) { img = KiResizeImage(img, 60, 60, 0); } Graphics g = Graphics.FromImage(imgBack); //g.DrawImage(imgBack, 0, 0, 相框宽, 相框高); g.DrawImage(imgBack, 0, 0, imgBack.Width, imgBack.Height); //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 System.Drawing.Image KiResizeImage(System.Drawing.Image bmp, int newW, int newH, int Mode) { try { System.Drawing.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; } } }}
3.生成二维码(psb.jpg可自选，此处默认)
protected void BtnCreate_Click(object sender, EventArgs e) { QRCodeEncoderDemo qrc = new QRCodeEncoderDemo(); //生成二维码图片 System.Drawing.Image ImageBack=qrc.GCode(this.txtstr.Text.ToString()); string DestImg = Server.MapPath(@"~/Image/psb.jpg"); System.Drawing.Image Img = QRCodeEncoderDemo.CombinImage(ImageBack, DestImg); string filename = DateTime.Now.ToString("yyyyMMddhhmmss") + ".jpg"; Img.Save(Server.MapPath(@"~/Image/") + filename); this.Img.ImageUrl = "~/Image/" + filename; }
4.解析二维码
protected void Button1_Click(object sender, EventArgs e) { QRCodeDecoder decoder = new QRCodeDecoder(); Bitmap bt = new Bitmap(Server.MapPath(@"~/Image/"+this.Img.ImageUrl.Substring(this.Img.ImageUrl.LastIndexOf('/')))); string decodedString = decoder.decode(new QRCodeBitmapImage(bt),Encoding.UTF8); this.TxtContent.Text = decodedString; }
