ZXing生成二维码

dll：https://files.cnblogs.com/files/jake-ge/ZXing.rar

引入命名空间

using System.Drawing;
using System.IO;
using ZXing;
using ZXing.Common;

    public byte[] GenBarCode(string Contents)
    {
        EncodingOptions options = new EncodingOptions();
        BarcodeWriter writer = null;
        options.Width = 50;
        options.Height = 50;
        writer = new BarcodeWriter();
        writer.Format = BarcodeFormat.QR_CODE;
        writer.Options = options;

        Bitmap bitmap = writer.Write(Contents);
        MemoryStream ms = new MemoryStream();
        bitmap.Save(ms, System.Drawing.Imaging.ImageFormat.Bmp);
        byte[] bytes = ms.GetBuffer();
        ms.Close();
        return bytes;
    }