.net生成二维码

下好QRCode.dll引用到项目中

using System;

using System.Collections.Generic;

using System.Linq;

using System.Web;

using System.Web.UI;

using System.Web.UI.WebControls;

using ThoughtWorks.QRCode.Codec;

using ThoughtWorks.QRCode.Codec.Data;

using ThoughtWorks.QRCode.Codec.Util;

using System.IO;

using System.Text;

namespace Experiment

{

    public partial class WebForm1 : System.Web.UI.Page

    {

        protected void Page_Load(object sender, EventArgs e)

        {

            if (!IsPostBack)

            {

            }

        }

        protected void btnGet_Click(object sender, EventArgs e)

        {

            QRCodeEncoder qrCodeEncoder = new QRCodeEncoder();

            qrCodeEncoder.QRCodeEncodeMode = QRCodeEncoder.ENCODE_MODE.BYTE;

            qrCodeEncoder.QRCodeScale = 4;

            qrCodeEncoder.QRCodeVersion = 8;

            qrCodeEncoder.QRCodeErrorCorrect = QRCodeEncoder.ERROR_CORRECTION.M;

            String data = txtinfo.Text.ToString();

            Response.Write(data);

            System.Drawing.Bitmap image = qrCodeEncoder.Encode(data);

            System.IO.MemoryStream MStream = new System.IO.MemoryStream();

            image.Save(MStream, System.Drawing.Imaging.ImageFormat.Png);

            Response.ClearContent();

            Response.ContentType = "image/Png";

            Response.BinaryWrite(MStream.ToArray());

            //FileInfo f = new FileInfo(@"d:\zl.png");  

            string path = Server.MapPath("2dbcode/");

            string tempname = Guid.NewGuid().ToString()+".png";

            Directory.CreateDirectory(path);

            FileStream fs = new FileStream(path + tempname, FileMode.CreateNew, FileAccess.ReadWrite);

            BinaryWriter bw = new BinaryWriter(fs, UTF8Encoding.UTF8);

            byte[] by = MStream.ToArray();

            for (int i = 0; i < MStream.ToArray().Length; i++)

            bw.Write(by[i]);

            fs.Close();

        }

    }

}