asp.net 生成二维码 例子

【实例截图】

【核心代码】

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");
        var strDir=Server.MapPath("~/images/");
        Directory.CreateDirectory(strDir);
        FileStream fs = new FileStream(Path.Combine(strDir,DateTime.Now.ToString("yyyy-M-dHHmmss")  "qrcode.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();

    }
}