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);
}

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