ThoughtWorks.QRCode使用示例

QRCodeHelper.cs

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

namespace God.Tools
{
    public class QRCodeHelper
    {
        public async Task<byte[]> SetQRAsync(string str)
        {
            QRCodeEncoder encoder = new QRCodeEncoder();
            encoder.QRCodeEncodeMode = ThoughtWorks.QRCode.Codec.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 = 10;//大小(值越大生成的二维码图片像素越高)使用QRCodeDecoder最大能解码25像素的，手机扫描多大都无所谓
            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 = ThoughtWorks.QRCode.Codec.QRCodeEncoder.ERROR_CORRECTION.M;//错误效验、错误更正(有4个等级)
            string qrdata = str;
            Bitmap bp = encoder.Encode(qrdata.ToString());//, Encoding.GetEncoding("GB2312")
            using (MemoryStream ms = new MemoryStream())
            {
                bp.Save(ms, ImageFormat.Jpeg);
                byte[] bytes = new byte[ms.Length];
                ms.Position = 0;
                await ms.ReadAsync(bytes, 0, bytes.Length);
                return bytes;
            }
        }
    }
}

        /// <summary>
        /// 生成二维码
        /// </summary>
        /// <param name="str"></param>
        /// <returns></returns>
        public async Task<Byte[]> GetQRCodeAsync(string str)
        {
            QRCodeHelper qrh = new QRCodeHelper();
            return await qrh.SetQRAsync(str);
        }