.net 提取 json 数据

.net 提取 json 数据.

HttpHelper.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Net;
using System.Text;
using System.IO;

namespace Weixin.Common
{
    public class HttpHelper
    {
        private const string DefaultUserAgent = "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.2; SV1; .NET CLR 1.1.4322; .NET CLR 2.0.50727)";

        /// <summary>
        /// 创建GET方式的HTTP请求  
        /// </summary>
        /// <param name="url">请求URL</param>
        /// <param name="timeout">请求超时时间</param>
        /// <param name="userAgent">浏览器信息</param>
        /// <param name="encoding">编码</param>
        /// <param name="headers">请求头信息</param>
        /// <param name="cookies">随同HTTP请求发送的Cookie信息，如果不需要身份验证可以为空</param>
        /// <returns></returns>
        public static String Get(string url, int? timeout, string userAgent, Encoding encoding, IList<KeyValuePair<string, string>> headers, CookieCollection cookies = null)
        {
            var reponse = CreateGetHttpResponse(url, timeout, userAgent, headers, cookies);
            return ResponseToString(reponse, encoding);

        }

        /// <summary>  
        /// 创建GET方式的HTTP请求  
        /// </summary>  
        /// <param name="url">请求的URL</param>  
        /// <param name="timeout">请求的超时时间</param>  
        /// <param name="userAgent">请求的客户端浏览器信息，可以为空</param>  
        /// <param name="headers">请求的客户端浏览器头，可以为空</param>  
        /// <param name="cookies">随同HTTP请求发送的Cookie信息，如果不需要身份验证可以为空</param>  
        /// <returns></returns>  
        public static HttpWebResponse CreateGetHttpResponse(string url, int? timeout, string userAgent,
            IList<KeyValuePair<string, string>> headers, CookieCollection cookies = null)
        {
            if (string.IsNullOrEmpty(url))
            {
                throw new ArgumentNullException("url");
            }
            var request = WebRequest.Create(url) as HttpWebRequest;
            if (request == null)
            {
                return null;
            }
            request.Method = "GET";
            request.UserAgent = DefaultUserAgent;
            if (!string.IsNullOrEmpty(userAgent))
            {
                request.UserAgent = userAgent;
            }
            if (timeout.HasValue)
            {
                request.Timeout = timeout.Value;
            }
            if (cookies != null)
            {
                request.CookieContainer = new CookieContainer();
                request.CookieContainer.Add(cookies);
            }
            //如果Header
            if (headers != null)
            {
                foreach (var header in headers)
                {
                    request.Headers.Add(header.Key, header.Value);
                }
            }
            return request.GetResponse() as HttpWebResponse;
        }

        public static string ResponseToString(WebResponse reponse, Encoding encoding)
        {
            var result = string.Empty;
            if (reponse != null)
            {
                using (var stream = reponse.GetResponseStream())
                {
                    if (stream != null)
                    {
                        using (var sr = new StreamReader(stream, encoding))
                        {
                            result = sr.ReadToEnd();
                        }
                    }
                }
                reponse.Close();
            }
            return result;
        }
    }
}

使用:

string jsonUrl = "http://www.xxx.cn/api/replymsg?keywords=" + con; //得到json
/* {"id":1,"keywords":"一图了然","title":"一图了然｜秒懂“三互”大通关建设改革方案","img":null,"link":"http://mp.weixin.qq.com/s?__***38f#rd","createTime":"\/Date(1428129560757)\/"} */  

string tt = HttpHelper.Get(jsonUrl, null, null, Encoding.UTF8, null, null);
if (jsonUrl.Count() != 0)
{
	twxxInfo twxx = new twxxInfo();
	try
	{
		twxx = JsonConvert.DeserializeObject<twxxInfo>(tt);
	}
	catch (Exception ex)
	{
		title = ex.Message;
	}
	string title = twxx.title;
	string description = twxx.description;
	string img = twxx.img;
	string link = twxx.link;
	string[,] kw = { { "" + title + "", "" + description + "", "" + img + "", "" + link + "" } };
	weixinVO = getMenuHelper(kw);
	return weixinVO;
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;

namespace Weixin.Common
{
    public class twxxInfo
    {
        public int id { get; set; }
        public string keywords { get; set; }
        public string title { get; set; }
        public string img { get; set; }
        public string description { get; set; }
        public string link { get; set; }
        public Nullable<System.DateTime> createTime { get; set; }
    }
}