using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
/// <summary>
///  Call the network API  generate 2 D code    A lot  2013 years 11 month 12 day 10:54:38
/// </summary>
public class Qr
{
    public Qr()
    {
        //
        //TODO:  Add the constructor logic here
        //
    }
    /*
    bg  The background color  bg= Color code, such as: bg=ffffff
    fg  The foreground color  fg= Color code, such as: fg=cc0000
    gc  The gradient color  gc= Color code, such as: gc=cc00000
    el  Error correction level  el Available value: h\q\m\l , such as: el=h
    w  The size  w= Values (pixels), such as: w=300
    m  Quiet area (margin)  m= Values (pixels), such as: m=30
    pt  Color of registration point (frame)  pt= Color code, such as: pt=00ff00
    inpt  Color of registration point (inner point)  inpt= Color code, such as: inpt=000000
    logo logo The picture  logo= Image address, e.g. : logo=http://www.xxx.cn/logo.png
    */
    public const string api = "http://qr.liantu.com/api.php";
    /// <summary>
    ///  According to the URL And parameters   The return address
    /// </summary>
    /// <param name="name"></param>
    /// <param name="tel"></param>
    /// <param name="email"></param>
    /// <param name="logo"></param>
    /// <returns></returns>
    public static string GenerationCard(string name, string tel, string email, string logo = "")
    {
        string RequestUrl = api;
        string mecard = "MECARD:N:" + name + ";TEL:" + tel + ";EMAIL:" + email + ";";
        RequestUrl += "?text=" + mecard;
        if (logo != "")
        {
            RequestUrl += "&logo=" + logo;
        }
        return RequestUrl;
    }
}

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