短信验证

1.页面一个验证码文本输入框，后面跟一个“获取验证码”按钮，同时限制按钮的点击时间，一般是限制1分钟才能点击一次

2.点击按钮，将用户ID，生成的验证码，存入数据库，接下来调用短信发送接口将信息发送出去

3.表单提交时，判断该验证码是否正确（是否在表中存在同时验证码是否失效，一般是五分钟内失效）

  string aa = "https://106.ihuyi.com/webservice/sms.php?method=Submit&account= cf_820988647      &password=  092100        &mobile=";
            string bb = id;
            string cc = "&content=您的验证码是：【" + Session["ValidateCode"].ToString() + "】。请不要把验证码泄露给其他人。";

            string url = aa + bb + cc;
          
            string Result = GetHtmlFromUrl(url);
            return Content("<script>alert('以发送到您的手机，请注意查收');location.href='/User/Register</script>");

 public ActionResult tell(string phone,string ids)
        {
			Functionentity entity = new Functionentity();
			string P = Session["User_Phone"].ToString();
			var data = entity.user.Where(p => p.User_Phone == P).FirstOrDefault();
			if(data==null)
			{
				return Content("<script>alert('请填写正确的手机号！');location.href='/User/UserRegister'</script>");
			}
			else
			{
				Session["User_Name"] = data.User_Name;
				string a = Session["ValidateCode"].ToString();
				if (a == phone)
				{
					Session["User_Phone"] = data.User_Phone;
					Session["User_Id"] = data.User_Id;
					Session["User_Photo"] = data.User_Photo;
					return Content("<script>alert('登录成功！');location.href='/Admin/QIndex'</script>");

				}
				else
				{
					return Content("<script>alert('登录失败！');location.href='/User/Register'</script>");
				}
			}
               
        }
        //手机短信验证码
        public string GetHtmlFromUrl(string url)
        {
            string strRet = null;
            if (url == null || url.Trim().ToString() == "")
            {
                return strRet;
            }
            string targeturl = url.Trim().ToString();
            try
            {
                HttpWebRequest hr = (HttpWebRequest)WebRequest.Create(targeturl);
                hr.UserAgent = "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1)";
                hr.Method = "GET";
                hr.Timeout = 30 * 60 * 1000;
                WebResponse hs = hr.GetResponse();
                Stream sr = hs.GetResponseStream();
                StreamReader ser = new StreamReader(sr, Encoding.Default);
                strRet = ser.ReadToEnd();
            }
            catch (Exception ex)
            {
                strRet = null;
            }
            return strRet;
        }

也可参考以下网址：

淘码（新平台还不错）：http://www.taomapt.com/

爱玛（老平台，网页版支持二次接码）：http://www.f02.cn

飞q（老平台流畅）：http://sms.xudan123.com/

51码：http://www.jikesms.com/user/