c# s生成二维码

1.添加 ZXing.Net包

2.生成二维码类

using System.Drawing;
using System.IO;
using System.Net;
using System.Net.Http;
using System.Net.Http.Headers;
using ZXing;
using ZXing.Common;

namespace Text
{
    public class QRCodeHelper
    {
        /// <summary>
        /// 生成二维码
        /// </summary>
        /// <param name=\”data\”></param>
        /// <param name=\”width\”></param>
        /// <param name=\”height\”></param>
        /// <returns></returns>
        public static HttpResponseMessage CreateQRCode(string data, int width, int height)
        {
            Bitmap bt = null;
            BarcodeWriter bcw = new BarcodeWriter();
            bcw.Format = BarcodeFormat.QR_CODE;
            bcw.Options.Hints.Add(EncodeHintType.DISABLE_ECI, true);
            bcw.Options.Hints.Add(EncodeHintType.CHARACTER_SET, \”utf-8\”);
            bcw.Options.Hints.Add(EncodeHintType.ERROR_CORRECTION, ZXing.QrCode.Internal.ErrorCorrectionLevel.H);
            bcw.Options.Height = height;
            bcw.Options.Width = width;
            bcw.Options.Margin = 0;
            BitMatrix bm = bcw.Encode(data);
            bt = bcw.Write(bm);

            MemoryStream ms = new MemoryStream();
            bt.Save(ms, System.Drawing.Imaging.ImageFormat.Png);

            var hrm = new HttpResponseMessage(HttpStatusCode.OK);
            hrm.Content = new ByteArrayContent(ms.ToArray());
            hrm.Content.Headers.ContentType = new MediaTypeHeaderValue(\”image/png\”);
            return hrm;
        }
    }
}