详解ASP.NET 生成二维码实例（采用ThoughtWorks.QRCo

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。

并且提供VS2013写的一个Demo提供给大家免费下载。如有疑问欢迎交流。

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ing?&"; 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(); } }

/// <summary> /// 获取二维码 /// </summary> /// <param>待编码的字符</param> /// <param>输出流</param> ///<returns>True if the encoding succeeded, false if the content is empty or too large to fit in a QR code</returns> 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; }

下面是下载地址：demo