[R语言] 生成二维码与返回流

using System;
using System.Collections.Generic;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Web;
namespace Glonee.Handler
{
  /// <summary>
  /// ErWeiMa 的摘要说明
  /// </summary>
  public class ErWeiMa : IHttpHandler
  {
    public void Proce***equest(HttpContext context)
    {
      context.Response.ContentType = "text/plain";
      string strSource = context.Request.Params["strSource"];
      string text = "";
      int width = 250;
      int height = 250;
      string fontName = "楷体";
      Image image = (GetTwoDimensionCode(strSource,text,width,height,fontName));
      context.Response.ContentType = "image/jpeg";
      image.Save(context.Response.OutputStream, System.Drawing.Imaging.ImageFormat.Jpeg);
      image.Dispose();
    }
    public bool IsReusable
    {
      get
      {
        return false;
      }
    }
    public static Bitmap GetTwoDimensionCode(string strSource,
       string text, int width, int height, string fontName)
    {
      // 创建Bitmap对象
      Bitmap bmp = new Bitmap(width, height);
      // 从image创建 Graphics对象
      Graphics objGraphics = Graphics.FromImage(bmp);
      // 填上背景色
      objGraphics.FillRectangle(Brushes.White, 0, 0, bmp.Width, bmp.Height);
      // 
      ThoughtWorks.QRCode.Codec.QRCodeEncoder qrCodeEncoder =
        new ThoughtWorks.QRCode.Codec.QRCodeEncoder();
      // 设置编码方法
      qrCodeEncoder.QRCodeEncodeMode =
        ThoughtWorks.QRCode.Codec.QRCodeEncoder.ENCODE_MODE.BYTE;
      // 设置大小
      qrCodeEncoder.QRCodeScale = 3;
      // 适用于信息量较少的情形，图像越小保存的信息量越少
      // qrCodeEncoder.QRCodeScale = 4;
      // 设置版本
      qrCodeEncoder.QRCodeVersion = 0;
      // 设置错误校验的级别，正因为二维码有纠错能力，才能够加入logo
      qrCodeEncoder.QRCodeErrorCorrect =
        ThoughtWorks.QRCode.Codec.QRCodeEncoder.ERROR_CORRECTION.M;
      Image image = qrCodeEncoder.Encode(strSource, Encoding.GetEncoding("utf-8"));
      // 写入二维码
      int x = (int)(width - image.Width) / 2;
      int y = (int)(height - image.Height) / 2;
      objGraphics.DrawImage(image, new Point(x, y));
// 添加Logo图标
      image = Image.FromFile(@"G:\ASP.net\S2结业项目\MI\MI\img\logo-footer.png");
      x = (int)(width - image.Width) / 2;
      y = (int)(height - image.Height) / 2;
      objGraphics.DrawImage(image, new Point(x, y));
      // 写入字符串
      //objGraphics.DrawString(text, new Font(fontName, 13, FontStyle.Bold), 
      //  Brushes.Black, new PointF(43, 15));
      return bmp;
    }
  }
}

想要使用这个返回的值 就直接src 去访问这个handler