C# 生成并解析二维码图片 Demo

【实例简介】识别二维码，条形码

【实例截图】

【核心代码】

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using com.google.zxing;
using com.google.zxing.common;

namespace zxing
{
    public partial class FrmCode : Form
    {
        public FrmCode()
        {
            InitializeComponent();           
        }

      

        private void btnEnTwo_Click(object sender, EventArgs e)
        {           
            lbshow.Text = "";
            if (string.IsNullOrEmpty(txtMsg.Text))
            {
                MessageBox.Show("请输入文字内容");
                return;
            }
            try
            {
                MultiFormatWriter mutiWriter = new MultiFormatWriter();
                ByteMatrix bm = mutiWriter.encode(txtMsg.Text, BarcodeFormat.QR_CODE, 200, 200);
                Bitmap img = bm.ToBitmap();
                pictureBox1.Image = img;

                //自动保存图片到当前目录
                string filename = System.Environment.CurrentDirectory   "\\QR"   DateTime.Now.Ticks.ToString()   ".jpg";
                img.Save(filename, System.Drawing.Imaging.ImageFormat.Jpeg);
                lbshow.Text = "图片已保存到："   filename;
            }
            catch (Exception ee)
            { MessageBox.Show(ee.Message); }
        }

        private void btnDeTwo_Click(object sender, EventArgs e)
        {
            using (OpenFileDialog openFileDialog = new OpenFileDialog())
            {
                openFileDialog.Title = "选择二维码图片";
                openFileDialog.Filter = "Images (*.BMP;*.JPG;*.GIF)|*.BMP;*.JPG;";
                openFileDialog.AddExtension = true;
                openFileDialog.RestoreDirectory = true;

                if (openFileDialog.ShowDialog() == DialogResult.OK)
                {
                    MultiFormatReader mutiReader = new MultiFormatReader();
                    Bitmap img = (Bitmap)Bitmap.FromFile(openFileDialog.FileName);
                    if (img == null)
                        return;
                    pictureBox1.Image = img;
                    LuminanceSource ls = new RGBLuminanceSource(img, img.Width, img.Height);
                    BinaryBitmap bb = new BinaryBitmap(new HybridBinarizer(ls));

                    Result r = mutiReader.decode(bb);
                    txtMsg.Text = r.Text;
                }
            }
        }


       
    }
}