c#創建二維碼

在Winform中有很多方法創建二維碼：

1. 利用ThoughtWorks.QRCode.dll,nuget包引用

using System;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using ThoughtWorks.QRCode.Codec;

namespace QRCodeDemo
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
            pictureBox1.ImageLocation = QRCode("http://www.baidu.com");
        }

        private static string QRCode(string encodeString)
        {
            Bitmap bt;
            QRCodeEncoder qRCodeEncoder = new QRCodeEncoder();
            qRCodeEncoder.QRCodeEncodeMode = QRCodeEncoder.ENCODE_MODE.BYTE;
            qRCodeEncoder.QRCodeScale = 4;
            qRCodeEncoder.QRCodeVersion = 6;
            qRCodeEncoder.QRCodeErrorCorrect = QRCodeEncoder.ERROR_CORRECTION.M;
            qRCodeEncoder.QRCodeBackgroundColor = Color.White;
            qRCodeEncoder.QRCodeForegroundColor = Color.Black;
            bt = qRCodeEncoder.Encode(encodeString, Encoding.UTF8);
            string filename = "code";
            string filepath = AppDomain.CurrentDomain.BaseDirectory + "QRCode\\";
            string codeUrl = filepath + filename + ".jpg";
            if (!System.IO.Directory.Exists(filepath))
            {
                System.IO.Directory.CreateDirectory(filepath);
            }
            bt.Save(codeUrl);
            
            return codeUrl;
        }
    }
}

3. 利用Devexpress的BarControl控件。 這個可以直接拖動控件，使用比較簡單
   效果圖：
   

參考:

1. https://www.cnblogs.com/wuhuacong/p/6112976.html
2. https://www.cnblogs.com/cang12138/p/5209669.html