详解ASP.NET 生成二维码实例（采用ThoughtWorks.QRCode和QrCode.Net两种方式）

最近做项目遇到生成二维码的问题，发现网上用的最多的是ThoughtWorks.QRCode和QrCode.Net两种方式。访问官网看着例子写了两个Demo，使用过程中发现两个都挺好用的，ThoughtWorks.QRCode的功能更多一些，但是dll文件有6兆，QrCode.Net只有400多K，大家根据自己的需要选择吧。附上代码仅供参考。

ThoughtWorks.QRCode：

private void CreateQrcode(string nr)

    {

      Bitmap bt;

      string enCodeString = nr;

      QRCodeEncoder qrCodeEncoder = new QRCodeEncoder();

      bt = qrCodeEncoder.Encode(enCodeString, Encoding.UTF8);

      string filename = DateTime.Now.ToString("yyyymmddhhmmss");

      string path = Server.MapPath("~/image/") + filename + ".jpg";

      Response.Write(path);

      bt.Save(path);

      this.Image1.ImageUrl = "~/image/" + filename + ".jpg";

    }

QrCode.Net:

protected void Button1_Click(object sender, EventArgs e)

    {

      using (var ms = new MemoryStream())

      {
        string stringtest = "中国inghttp://www.baidu.com/mvc.test?&";

        GetQRCode(stringtest, ms);

        Response.ContentType = "image/Png";

        Response.OutputStream.Write(ms.GetBuffer(), 0, (int)ms.Length);

        Image img = Image.FromStream(ms);

        string filename = DateTime.Now.ToString("yyyymmddhhmmss");

        string path = Server.MapPath("~/image/") + filename + ".png";

        img.Save(path);

        Response.End();

      } 
    }

    /// 


    /// 获取二维码

    /// 

    /// 待编码的字符

    /// 输出流

    ///True if the encoding succeeded, false if the content is empty or too large to fit in a QR code

    public static bool GetQRCode(string strContent, MemoryStream ms)

    {

      ErrorCorrectionLevel Ecl = ErrorCorrectionLevel.M; //误差校正水平 

      string Content = strContent;//待编码内容

      QuietZoneModules QuietZones = QuietZoneModules.Two; //空白区域 

      int ModuleSize = 12;//大小

      var encoder = new QrEncoder(Ecl);

      QrCode qr;

      if (encoder.TryEncode(Content, out qr))//对内容进行编码，并保存生成的矩阵

      {

        var render = new GraphicsRenderer(new FixedModuleSize(ModuleSize, QuietZones));

        render.WriteToStream(qr.Matrix, ImageFormat.Png, ms);

      }

      else

      {

        return false;

      }

      return true;

    }