c#---windows窗体GUI--软件模型4--二维码编码和解码

1.ThoughtWorks.QRCode.dll

2.二维码使用的类

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Net;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.IO;
using ThoughtWorks;
using ThoughtWorks.QRCode;
using ThoughtWorks.QRCode.Codec;
using ThoughtWorks.QRCode.Codec.Data;
using WindowsFormsApplication1.classtools;


namespace WindowsFormsApplication1.classtools
{
    class ErWeiMa
    {

        CurrencyTool ct = new CurrencyTool();
        ///
        //代码如下:c# pictureBox1.Image的获得图片路径的三种方法 winform
        //1.绝对路径:
        //this.pictureBox2.Image=Image.FromFile("D:\\001.jpg");
        //2.相对路径:
        //Application.StartupPath; 
        //可以得到程序根目录 
        //string picPath=Application.StartupPath+"\\1.gif";
        //3.获得网络图片的路径
        //this.pictureBox2.Image= Image.FromStream(System.Net.WebRequest.Create(http://www.xyhhxx.com/images/logo/logo.gif).GetResponse().GetResponseStream());      
        ///
        //二维码生成函数
        public void create_two(PictureBox pictureBox1,TextBox textBox7,string nr)
        {
            try {
                Bitmap bt;
                string enCodeString = nr;
                if (enCodeString == "" || enCodeString == null)
                {
                    MessageBox.Show("信息不能为空！！");
                    return;
                }
                QRCodeEncoder qrCodeEncoder = new QRCodeEncoder();
                bt = qrCodeEncoder.Encode(enCodeString, Encoding.UTF8);
                string filename = string.Format(DateTime.Now.ToString(), "yyyymmddhhmmss")
                 + ".jpg";
                filename = filename.Replace(" ", "");
                filename = filename.Replace(":", "");
                filename = filename.Replace("-", "");
                filename = filename.Replace("/", "");
                filename = filename.Replace(".", "");
                bt.Save(ct.IsFlagPath(Application.StartupPath + "\\image\\") + filename + ".jpg");
                pictureBox1.ImageLocation = Application.StartupPath + "/image/" + filename + ".jpg";
                textBox7.Text = ct.IsFlagPath(Application.StartupPath + "\\image\\") + filename + ".jpg";
            }catch(Exception e){
                MessageBox.Show("您输入的内容过长！");
            }
           
        }




        //生成二维码方法一
        private void CreateCode_Simple(string nr)
        {
            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("ssssssssssst test");
            System.Drawing.Image image = qrCodeEncoder.Encode(nr);
            string filename = DateTime.Now.ToString("yyyymmddhhmmssfff").ToString() + ".jpg";
            string filepath = Application.StartupPath + "\\image" + "\\" + filename;
            System.IO.FileStream fs = new System.IO.FileStream(filepath, System.IO.FileMode.OpenOrCreate, System.IO.FileAccess.Write);
            image.Save(fs, System.Drawing.Imaging.ImageFormat.Jpeg);

            fs.Close();
            image.Dispose();
            //二维码解码
            var codeDecoder = CodeDecoder(filepath);
        }

        /// <summary>
        /// 二维码解码
        /// </summary>
        /// <param name="filePath">图片路径</param>
        /// <returns></returns>
        public string CodeDecoder(string filePath)
        {
            if (!System.IO.File.Exists(filePath))
                return null;
            Bitmap myBitmap = new Bitmap(Image.FromFile(filePath));
            QRCodeDecoder decoder = new QRCodeDecoder();
            string decodedString = decoder.decode(new QRCodeBitmapImage(myBitmap));
            return decodedString;
        }
    }
}

 

3.使用

 string erstr = textBox6.Text.Trim();

//生成二维码

ewm.create_two(pictureBox1,textBox7,erstr);