ASP.NET实现二维码

using system;
using system.collections.generic;
using system.drawing;
using system.linq;
using system.text;
using system.web;
using system.web.ui;
using system.web.ui.webcontrols;
using thoughtworks.qrcode.codec;

namespace wechat
{
public partial class webform2 : system.web.ui.page
{
protected void page_load(object sender, eventargs e)
{

}

protected void btncrc_click(object sender, eventargs e)
{
//创建时间
datetime currenttime = new system.datetime();
//取当前年月日时分秒
currenttime = system.datetime.now;
//取当前年
int year = currenttime.year;
//取当前月
int month = currenttime.month;
//取当前日
int day = currenttime.day;
if (day < 10)
{
day = 0 + day;
}
//取当前时
int hour = currenttime.hour;
//取当前分
int minute = currenttime.minute;
int minute1 = currenttime.minute + 10;
//取当前秒
int second = currenttime.second;
//取当前毫秒
int millisecond = currenttime.millisecond;
this.txtcrc.text = second.tostring();
thoughtworksqrcode("您好欢迎使用二维码查看！");
}
private void thoughtworksqrcode(string strtxt)
{
try
{
bitmap bt;
string encodestring = strtxt;
qrcodeencoder qrcodeencoder = new qrcodeencoder();
bt = qrcodeencoder.encode(encodestring, encoding.utf8);
string filename = datetime.now.tostring("yyyymmddhhmmss");
filename = filename.replace(" ", "");
filename = filename.replace(":", "");
filename = filename.replace("-", "");
filename = filename.replace(".", "");
bt.save(server.mappath("~/images/") + filename + ".jpg");
this.image1.imageurl = "~/images/" + filename + ".jpg";
}
catch (exception e)
{
throw e;
}

}

//public void generateqrcode(string content)
//{
// try
// {
// // _filelog.info("generateqrcode|开始生成二维码");
// if (null != content)
// {
// //初始化二维码生成工具
// var qrcodeencoder = new qrcodeencoder
// {
// qrcodeencodemode = qrcodeencoder.encode_mode.byte,
// qrcodeerrorcorrect = qrcodeencoder.error_correction.m,
// qrcodeversion = 0,
// qrcodescale = 4
// };
// //将字符串生成二维码图片
// var image = qrcodeencoder.encode(content);
// var ms = new memorystream();
// image.save(ms, imageformat.png);
// response.binarywrite(ms.getbuffer());
// response.end();
// }
// //_filelog.info("cloudcardcontroller|generateqrcode|成功生成二维码");
// }
// catch (exception ex)
// {
// //_filelog.error("generateqrcode|生成二维码出现异常,异常信息：" + ex.message);
// }

//}
//private void createcode_simple(string nr)
//{
// qrcodeencoder qrcodeencoder = new qrcodeencoder();
// qrcodeencoder.qrcodeencodemode = qrcodeencoder.encode_mode.byte;
// qrcodeencoder.qrcodescale = 4;
// qrcodeencoder.qrcodeversion = 8;
// qrcodeencoder.qrcodeerrorcorrect = qrcodeencoder.error_correction.m;
// //system.drawing.image image = qrcodeencoder.encode("4408810820 深圳－广州 小江");
// system.drawing.image image = qrcodeencoder.encode(nr);
// string filename = datetime.now.tostring("yyyymmddhhmmssfff").tostring() + ".jpg";
// string filepath = server.mappath(@"~\upload") + "\\" + 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();
// //二维码解码
// var codedecoder = codedecoder(filepath);
//}

///// <summary>
///// 二维码解码
///// </summary>
///// <param name="filepath">图片路径</param>
///// <returns></returns>
//public string codedecoder(string filepath)
//{
// if (!system.io.file.exists(filepath))
// return null;
// bitmap mybitmap = new bitmap(image.fromfile(filepath));
// qrcodedecoder decoder = new qrcodedecoder();
// string decodedstring = decoder.decode(new qrcodebitmapimage(mybitmap));
// return decodedstring;
//}
}
}