asp.net生成二维码

下面使用ThoughtWorks.QRCode.dll这个类库，实现生成二维码

使用时需要增加:下面三个命名空间

using ThoughtWorks.QRCode.Codec;

using ThoughtWorks.QRCode.Codec.Data;

using ThoughtWorks.QRCode.Codec.Util;

下面代码主要是在asp.net中，生成一张二维码图片，在网页中显示，而且，将二维码图片保存在了，D：\zlf\zz。png；

using System;using System.Configuration;using System.Data;using System.Linq;using System.Web;using System.Web.Security;using System.Web.UI;using System.Web.UI.HtmlControls;using System.Web.UI.WebControls;using System.Web.UI.WebControls.WebParts;using System.xml.Linq;using System.Drawing.Imaging;using ThoughtWorks.QRCode.Codec;using ThoughtWorks.QRCode.Codec.Data;using ThoughtWorks.QRCode.Codec.Util;using System.IO;using System.Text;public partial class _Default : System.Web.UI.Page {    PRotected void Page_Load(object sender, EventArgs e)    {           }    protected void Button1_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 = "Hello 二维码！";        String data = TextBox1.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");        Directory.CreateDirectory("d:\\\\zlf");        FileStream fs = new FileStream("d:\\\\zlf\\\\zz。png", 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();    }}

aspx页面代码

<%@ Page Language="C#" AutoEventWireup="true"  CodeFile="Default.aspx.cs" Inherits="_Default" %>