using System;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.IO;
using System.Linq;
using System.Net;
using System.Text;
using System.Text.RegularExpressions;
using System.Web;
using System.Web.Security;
using System.Web.Services;
using System.Web.Services.Protocols;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml;
using System.Xml.Linq;
namespace WebApplication4
{
    public partial class _Default : System.Web.UI.Page
    {
        public string HttpSMSPost(HttpWebRequest hr, string parameters)
        {
            string strRet = null;
            ASCIIEncoding encoding = new ASCIIEncoding();
            byte[] data = encoding.GetBytes(parameters);

            try
            {
                hr.KeepAlive = false;
                hr.Method = "POST";
                hr.ContentType = "application/x-www-form-urlencoded";
                hr.ContentLength = data.Length;
                Stream newStream = hr.GetRequestStream();
                newStream.Write(data, 0, data.Length);
                newStream.Close();

                HttpWebResponse myResponse = (HttpWebResponse)hr.GetResponse();
                StreamReader reader = new StreamReader(myResponse.GetResponseStream(), Encoding.GetEncoding("gb2312"));
                strRet = reader.ReadToEnd();
                reader.Close();
                myResponse.Close();

            }
            catch (Exception ex)
            {
                strRet = ex.ToString();
            }
            return strRet;
        }
        protected void Page_Load(object sender, EventArgs e)
        {
          string url = "http://域名/LANZGateway/DirectSendSMSs.asp";
 string SMSparameters = "UserID=999999&Account=lanz2016&Password=735FF0028B7831D2783DD7EE98E3095DB94A1D64
&Content=" + System.Web.HttpUtility.UrlEncode("您的注册验证码为8268，该验证码10分钟内有效。如非本人操作请忽略此短信！【浪驰软件】",
 Encoding.GetEncoding("GB2312")) + "&Phones=11111111111&ReturnXJ=1";

          string targeturl = url.Trim().ToString();
          HttpWebRequest hr = (HttpWebRequest)WebRequest.Create(targeturl);
          string res = HttpSMSPost(hr, SMSparameters);
          Response.Write(res);
        }
    }
}
/pre>

XML：
<?xml version="1.0" encoding="GB2312"?>
<LANZ_ROOT>
<ErrorNum>0</ErrorNum>
<JobID>2321313130</JobID>
<PhonesSend>98</PhonesSend>
<ErrPhones>13855556666;13611112222</ErrPhones>
<DeductionSMSs>1000</DeductionSMSs>
</LANZ_ROOT>
 
JSON：
{
  "LANZ_ROOT": {
    "ErrorNum": "0",
    "JobID": "2321313130",
    "PhonesSend": "98",
    "ErrPhones": "13855556666;13611112222",
    "DeductionSMSs": "1000"
  }
}