QRCode.aspx.cs

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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;
namespace BySoft.Web.Site
{
    public partial class QRCode : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {

        }

        protected void Button1_Click(object sender, EventArgs e)
        {
            string CodeText = TextBox1.Text.Trim();
            if (!string.IsNullOrEmpty(CodeText))
            { 
                QRCodeEncoder qrCodeEncoder = new QRCodeEncoder();
                qrCodeEncoder.QRCodeEncodeMode = QRCodeEncoder.ENCODE_MODE.BYTE;
                qrCodeEncoder.QRCodeScale = 4;
                qrCodeEncoder.QRCodeVersion = 8;
                qrCodeEncoder.QRCodeErrorCorrect = QRCodeEncoder.ERROR_CORRECTION.M;
                System.Drawing.Bitmap image = qrCodeEncoder.Encode(CodeText);
                System.IO.MemoryStream MStream = new System.IO.MemoryStream();
                image.Save(MStream, System.Drawing.Imaging.ImageFormat.Png);

                string filename = DateTime.Now.ToString("yyyymmddhhmmssfff").ToString() + ".jpg";
                string filepath = Server.MapPath(@"UpFile") + "\\" + filename;
                System.IO.FileStream fs = new System.IO.FileStream(filepath, System.IO.FileMode.OpenOrCreate, System.IO.FileAccess.Write);
                image.Save(fs, System.Drawing.Imaging.ImageFormat.Jpeg);
                fs.Close();
                image.Dispose(); 
                ImageCode.Visible = true;
                ImageCode.ImageUrl = "UpFile/" + filename;
            }
        }  
    }
}