C#生成二维码（含解码）

来源：互联网发布：c 面向对象编程 pdf 编辑：程序博客网时间：2024/06/16 04:56
using System;using System.Collections.Generic;using System.ComponentModel;using System.Data;using System.Drawing;using System.Linq;using System.Text;using System.Windows.Forms;using System.Collections;using com.google.zxing;//需要从网上下载using System.Text.RegularExpressions;using ByteMatrix = com.google.zxing.common.ByteMatrix;namespace 二维码{    public partial class Form1 : Form    {        public Form1()        {            InitializeComponent();        }        //生成条形码        private void button1_Click(object sender, EventArgs e)        {            Regex rg = new Regex("^[0-9]{13}$");            if (!rg.IsMatch(textBox1.Text))            {                MessageBox.Show("本例子采用EAN_13编码，需要输入13位数字");                return;            }            try            {                MultiFormatWriter mutiWriter = new com.google.zxing.MultiFormatWriter();                ByteMatrix bm = mutiWriter.encode(textBox1.Text, com.google.zxing.BarcodeFormat.EAN_13, 363, 150);                Bitmap img = bm.ToBitmap();                pictureBox1.Image = img;                //自动保存图片到当前目录                string filename = System.Environment.CurrentDirectory + "\\EAN_13" + DateTime.Now.Ticks.ToString() + ".jpg";                img.Save(filename, System.Drawing.Imaging.ImageFormat.Jpeg);                label2.Text = "图片已保存到：" + filename;            }            catch (Exception ee)            {                 MessageBox.Show(ee.Message);            }        }        //生成二维码        private void button2_Click(object sender, EventArgs e)        {            try            {                MultiFormatWriter mutiWriter = new com.google.zxing.MultiFormatWriter();                ByteMatrix bm = mutiWriter.encode(textBox1.Text, com.google.zxing.BarcodeFormat.QR_CODE, 300, 300);                Bitmap img = bm.ToBitmap();                pictureBox1.Image = img;                string filename = System.Environment.CurrentDirectory + "\\QR" + DateTime.Now.Ticks.ToString() + ".jpg";                img.Save(filename, System.Drawing.Imaging.ImageFormat.Jpeg);                label2.Text = "图片已保存到：" + filename;            }            catch (Exception ee)            {                 MessageBox.Show(ee.Message);             }        }        //生成带图片的二维码        private void button3_Click(object sender, EventArgs e)        {            try            {                MultiFormatWriter mutiWriter = new com.google.zxing.MultiFormatWriter();                Hashtable hint = new Hashtable();                hint.Add(EncodeHintType.CHARACTER_SET, "UTF-8");                hint.Add(EncodeHintType.ERROR_CORRECTION, com.google.zxing.qrcode.decoder.ErrorCorrectionLevel.H);                ByteMatrix bm = mutiWriter.encode(textBox1.Text, com.google.zxing.BarcodeFormat.QR_CODE, 300, 300, hint);                Bitmap img = bm.ToBitmap();                Image middlImg = QRMiddleImg.Image;                System.Drawing.Size realSize = mutiWriter.GetEncodeSize(textBox1.Text, com.google.zxing.BarcodeFormat.QR_CODE, 300, 300);                //计算插入图片的大小和位置                int middleImgW = Math.Min((int)(realSize.Width / 3.5), middlImg.Width);                int middleImgH = Math.Min((int)(realSize.Height / 3.5), middlImg.Height);                int middleImgL = (img.Width - middleImgW) / 2;                int middleImgT = (img.Height - middleImgH) / 2;                //将img转换成bmp格式，否则后面无法创建 Graphics对象                Bitmap bmpimg = new Bitmap(img.Width, img.Height, System.Drawing.Imaging.PixelFormat.Format32bppArgb);                using (Graphics g = Graphics.FromImage(bmpimg))                {                    g.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.HighQualityBicubic;                    g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;                    g.CompositingQuality = System.Drawing.Drawing2D.CompositingQuality.HighQuality;                    g.DrawImage(img, 0, 0);                }                //在二维码中插入图片                System.Drawing.Graphics MyGraphic = System.Drawing.Graphics.FromImage(bmpimg);                //白底                MyGraphic.FillRectangle(Brushes.White, middleImgL, middleImgT, middleImgW, middleImgH);                MyGraphic.DrawImage(middlImg, middleImgL, middleImgT, middleImgW, middleImgH);                pictureBox1.Image = bmpimg;                //自动保存图片到当前目录                string filename = System.Environment.CurrentDirectory + "\\QR" + DateTime.Now.Ticks.ToString() + ".jpg";                bmpimg.Save(filename, System.Drawing.Imaging.ImageFormat.Jpeg);                label2.Text = "图片已保存到：" + filename;            }            catch (Exception ee)            {                 MessageBox.Show(ee.Message);             }        }        string opFilePath = "";        //选择要生成的中间图片        private void pictureBox2_Click(object sender, EventArgs e)        {            openFileDialog1.Filter = "图片文件|*.bmp;*.jpg;*.png;*.ico";            if (openFileDialog1.ShowDialog() == DialogResult.OK)            {                opFilePath = openFileDialog1.FileName;                Image img = Image.FromFile(opFilePath);                QRMiddleImg.Image = img;            }        }        //选择要解码的图片        private void button4_Click(object sender, EventArgs e)        {            openFileDialog1.Filter = "图片文件|*.bmp;*.jpg;*.png;*.ico";            if (openFileDialog1.ShowDialog() == DialogResult.OK)            {                opFilePath = openFileDialog1.FileName;                pictureBox2.ImageLocation = opFilePath;            }        }        //解码二维码        private void button5_Click(object sender, EventArgs e)        {            MultiFormatReader mutiReader = new com.google.zxing.MultiFormatReader();            Bitmap img = (Bitmap)Bitmap.FromFile(opFilePath);            if (img == null)                return;            LuminanceSource ls = new RGBLuminanceSource(img, img.Width, img.Height);            BinaryBitmap bb = new BinaryBitmap(new com.google.zxing.common.HybridBinarizer(ls));            //注意  必须是Utf-8编码            Hashtable hints = new Hashtable();            hints.Add(EncodeHintType.CHARACTER_SET, "UTF-8");            Result r = mutiReader.decode(bb, hints);            richTextBox1.Text = r.Text;        }    }}
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