using System.Drawing;

namespace chestnut_qrcode
{
    /// <summary>
    /// 二维码编码器
    /// </summary>
    public static class Encoder
    {
        /// <summary>
        /// 生成二维码
        /// </summary>
        /// <param name="msg">信息</param>
        /// <param name="version">版本 1 ~ 40</param>
        /// <param name="pixel">像素点大小</param>
        /// <param name="icon_path">图标路径</param>
        /// <param name="icon_size">图标尺寸</param>
        /// <param name="icon_border">图标边框厚度</param>
        /// <param name="white_edge">二维码白边</param>
        /// <returns>位图</returns>
        public static Bitmap code(string msg, int version, int pixel, string icon_path, int icon_size, int icon_border, bool white_edge)
        {

            QRCoder.QRCodeGenerator code_generator = new QRCoder.QRCodeGenerator();

            QRCoder.QRCodeData code_data = code_generator.CreateQrCode(msg, QRCoder.QRCodeGenerator.ECCLevel.M/* 这里设置容错率的一个级别 */, true, true, QRCoder.QRCodeGenerator.EciMode.Utf8, version);

            QRCoder.QRCode code = new QRCoder.QRCode(code_data);

            Bitmap icon = new Bitmap(icon_path);

            Bitmap bmp = code.GetGraphic(pixel, Color.Black, Color.White, icon, icon_size, icon_border, white_edge);

            return bmp;

        }
    }
}

using System;
using System.Drawing;
using System.Windows.Forms;

namespace chestnut_form
{
    public partial class frm_qrcode : Form
    {
        public frm_qrcode()
        {
            InitializeComponent();
        }

        // 窗体加载
        private void frm_qrcode_Load(object sender, EventArgs e)
        {
            cb_version.SelectedIndex = 1;

            cb_pixel.SelectedIndex = 0;

            cb_icon_size.SelectedIndex = 0;

            cb_icon_border.SelectedIndex = 1;
        }

        // 编码
        private void btn_encode_Click(object sender, EventArgs e)
        {
            int version = Convert.ToInt16(cb_version.Text);

            int pixel = Convert.ToInt16(cb_pixel.Text);

            string str_msg = tb_msg.Text;

            int int_icon_size = Convert.ToInt16(cb_icon_size.Text);

            int int_icon_border = Convert.ToInt16(cb_icon_border.Text);

            bool b_we = rb_we_y.Checked ? true : false;

            Bitmap bmp = chestnut_qrcode.Encoder.code(str_msg, version, pixel, "E:/seaconch/git/1.jpg", int_icon_size, int_icon_border, b_we);

            pb_qrcode.Image = bmp;
        }

        // 保存
        private void btn_save_Click(object sender, EventArgs e)
        {
            if (pb_qrcode.Image != null)

                using (SaveFileDialog sfd = new SaveFileDialog())
                {
                    sfd.Filter = "(*.png)|*.png|(*.bmp)|*.bmp";

                    if (sfd.ShowDialog() == DialogResult.OK) pb_qrcode.Image.Save(sfd.FileName);

                }
        }
    }
}