Form1.cs

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using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Drawing.Imaging;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using ThoughtWorks.QRCode.Codec;

namespace QRCODE
{
    public partial class Form1 : Form
    {
        string imgPath;
        string outpath;
        /// <summary>
        /// 使用ThoughtWorks生成二维码图片
        /// </summary>
        /// <param name="imgPath">图片路径</param>
        /// <param name="codeContent">内容信息</param>
        /// <returns></returns>
        public string NewQRCodeByThoughtWorks(string codeContent, ImageFormat imgType)
        {
            QRCodeEncoder encoder = new QRCodeEncoder();
            encoder.QRCodeEncodeMode = QRCodeEncoder.ENCODE_MODE.BYTE;//编码方式(注意：BYTE能支持中文，ALPHA_NUMERIC扫描出来的都是数字)
            encoder.QRCodeScale = 4;//大小(值越大生成的二维码图片像素越高)
            encoder.QRCodeVersion = 0;//版本(注意：设置为0主要是防止编码的字符串太长时发生错误)
            encoder.QRCodeErrorCorrect = QRCodeEncoder.ERROR_CORRECTION.M;//错误效验、错误更正(有4个等级)
           // encoder.QRCodeBackgroundColor = Color.Yellow;
           // encoder.QRCodeForegroundColor = Color.Green;

            Bitmap bcodeBitmap = encoder.Encode(codeContent);
            if (string.IsNullOrWhiteSpace(outpath))
            {
                FolderBrowserDialog folderBrowserDialog = new FolderBrowserDialog();
                folderBrowserDialog.Description = "选择Word文档生成的文件夹";
                folderBrowserDialog.ShowNewFolderButton = false;
                folderBrowserDialog.RootFolder = Environment.SpecialFolder.Personal;
                folderBrowserDialog.ShowDialog();
                outpath = folderBrowserDialog.SelectedPath;
             
            }
            string qrname = string.IsNullOrWhiteSpace(this.textBox2.Text) ? "out" : this.textBox2.Text;
            qrname = qrname.EndsWith(".jpg") ? qrname : qrname + ".jpg";
            imgPath = string.IsNullOrWhiteSpace(outpath) ? System.Environment.CurrentDirectory + "/" + qrname : outpath + "/" + qrname;

            bcodeBitmap.Save(imgPath, imgType);//@"E:\test.png"      ImageFormat.Png
            bcodeBitmap.Dispose();
            MessageBox.Show("生成成功!");
            return imgPath;
        }

        /// <summary>
        /// 使用ZxingNet生成二维码图片
        /// </summary>
        /// <param name="imgPath">图片路径</param>
        /// <param name="codeContent">内容信息</param>