百度APIStore接口访问c#版

#region << 版 本 注 释 >>
/*
 * ========================================================================
 * CLR版本 ：4.0.30319.42000
 * 类 名 称：BDAPIStoreHelper
 * 机器名称：ENGOO-YPF
 * 命名空间：YPF.Common.Web处理
 * 文 件 名：BDAPIStoreHelper
 * 创建时间：2016/12/14 17:55:21
 * 作    者：杨朋飞
 * 说   明：
 * 修改时间：
 * 修 改 人：
 * ========================================================================
*/
#endregion

using System.IO;
using System.Net;
using System.Text;
using System.Web.Script.Serialization;

namespace YPF.Common.Web处理
{
    /// 

    /// 百度APIStore调用帮助类
    /// 
    public class BDAPIStoreHelper
    {


        /// 

        /// 发送HttpPost请求
        /// 
        /// 请求的URL
        /// 请求的参数
        /// 您自己的apikey
        /// 请求结果(json对象)
        public static object Post(string url, string param, string apikey)
        {
            string strURL = url;
            HttpWebRequest request;
            request = (HttpWebRequest)WebRequest.Create(strURL);
            request.Method = "POST";
            // 添加header
            request.Headers.Add("apikey", apikey);
            request.ContentType = "application/x-www-form-urlencoded";
            string paraUrlCoded = param;
            byte[] payload;
            payload = Encoding.UTF8.GetBytes(paraUrlCoded);
            request.ContentLength = payload.Length;
            using (Stream writer = request.GetRequestStream())
            {
                writer.Write(payload, 0, payload.Length);
                HttpWebResponse response;
                response = (HttpWebResponse)request.GetResponse();
                Stream s;
                s = response.GetResponseStream();
                string StrDate = "";
                string strValue = "";
                using (StreamReader Reader = new StreamReader(s, Encoding.UTF8))
                {
                    while ((StrDate = Reader.ReadLine()) != null)
                    {
                        strValue += StrDate + "\r\n";
                    }
                    JavaScriptSerializer js = new JavaScriptSerializer();
                    return js.Deserialize