{"error":0,"status":"success","date":"2014-10-27","results":[{"currentCity":"上海","pm25":"95","index":[{"title":"穿衣","zs":"较舒适","tipt":"穿衣指数","des":"建议着薄外套、开衫牛仔衫裤等服装。年老体弱者应适当添加衣物，宜着夹克衫、薄毛衣等。"},{"title":"洗车","zs":"较适宜","tipt":"洗车指数","des":"较适宜洗车，未来一天无雨，<span style="width: auto; height: auto; float: none;" id="0_nwp"><a style="text-decoration: none;" mpid="0" target="_blank" href="http://cpro.baidu.com/cpro/ui/uijs.php?c=news&cf=1001&ch=0&di=128&fv=16&jk=f75039926fbab791&k=%B7%E7%C1%A6&k0=%B7%E7%C1%A6&kdi0=0&luki=5&n=10&p=baidu&q=00007110_cpr&rb=0&rs=1&seller_id=1&sid=91b7ba6f923950f7&ssp2=1&stid=0&t=tpclicked3_hc&tu=u1704338&u=http%3A%2F%2Fwww%2Edaxueit%2Ecom%2Farticle%2F5477%2Ehtml&urlid=0" id="0_nwl"><span style="color:#0000ff;font-size:14px;width:auto;height:auto;float:none;">风力</span></a></span>较小，擦洗一新的汽车至少能保持一天。"},{"title":"旅游","zs":"适宜","tipt":"旅游指数","des":"天气较好，温度适宜，但风稍微有点大。这样的天气适宜旅游，您可以尽情地享受大自然的无限风光。"},{"title":"感冒","zs":"较易发","tipt":"感冒指数","des":"天气较凉，较易发生感冒，请适当增加衣服。体质较弱的朋友尤其应该注意防护。"},{"title":"运动","zs":"较适宜","tipt":"运动指数","des":"天气较好，但风力较大，推荐您进行室内运动，若在户外运动请注意防风。"},{"title":"<span style="width: auto; height: auto; float: none;" id="1_nwp"><a style="text-decoration: none;" mpid="1" target="_blank" href="http://cpro.baidu.com/cpro/ui/uijs.php?c=news&cf=1001&ch=0&di=128&fv=16&jk=f75039926fbab791&k=%D7%CF%CD%E2%CF%DF&k0=%D7%CF%CD%E2%CF%DF&kdi0=0&luki=3&n=10&p=baidu&q=00007110_cpr&rb=0&rs=1&seller_id=1&sid=91b7ba6f923950f7&ssp2=1&stid=0&t=tpclicked3_hc&tu=u1704338&u=http%3A%2F%2Fwww%2Edaxueit%2Ecom%2Farticle%2F5477%2Ehtml&urlid=0" id="1_nwl"><span style="color:#0000ff;font-size:14px;width:auto;height:auto;float:none;">紫外线</span></a></span>强度","zs":"弱","tipt":"紫外线强度指数","des":"紫外线强度较弱，建议出门前涂擦SPF在12-15之间、PA+的防晒护肤品。"}],"weather_data":[{"date":"周一 10月27日 (实时：19℃)","<span style="width: auto; height: auto; float: none;" id="2_nwp"><a style="text-decoration: none;" mpid="2" target="_blank" href="http://cpro.baidu.com/cpro/ui/uijs.php?c=news&cf=1001&ch=0&di=128&fv=16&jk=f75039926fbab791&k=day&k0=day&kdi0=0&luki=2&n=10&p=baidu&q=00007110_cpr&rb=0&rs=1&seller_id=1&sid=91b7ba6f923950f7&ssp2=1&stid=0&t=tpclicked3_hc&tu=u1704338&u=http%3A%2F%2Fwww%2Edaxueit%2Ecom%2Farticle%2F5477%2Ehtml&urlid=0" id="2_nwl"><span style="color:#0000ff;font-size:14px;width:auto;height:auto;float:none;">day</span></a></span>PictureUrl":"http://api.map.baidu.com/images/weather/day/duoyun.png","nightPictureUrl":"http://api.map.baidu.com/images/weather/night/duoyun.png","weather":"多云","wind":"东北风3-4级","temperature":"21 ~ 16℃"},{"date":"周二","dayPictureUrl":"http://api.map.baidu.com/images/weather/day/duoyun.png","nightPictureUrl":"http://api.map.baidu.com/images/weather/night/yin.png","weather":"多云转阴","wind":"东风微风","temperature":"21 ~ 17℃"},{"date":"周三","<span style="width: auto; height: auto; float: none;" id="3_nwp"><a style="text-decoration: none;" mpid="3" target="_blank" href="http://cpro.baidu.com/cpro/ui/uijs.php?c=news&cf=1001&ch=0&di=128&fv=16&jk=f75039926fbab791&k=day&k0=day&kdi0=0&luki=2&n=10&p=baidu&q=00007110_cpr&rb=0&rs=1&seller_id=1&sid=91b7ba6f923950f7&ssp2=1&stid=0&t=tpclicked3_hc&tu=u1704338&u=http%3A%2F%2Fwww%2Edaxueit%2Ecom%2Farticle%2F5477%2Ehtml&urlid=0" id="3_nwl"><span style="color:#0000ff;font-size:14px;width:auto;height:auto;float:none;">day</span></a></span>PictureUrl":"http://api.map.baidu.com/images/weather/day/xiaoyu.png","nightPictureUrl":"http://api.map.baidu.com/images/weather/night/xiaoyu.png","weather":"小雨","wind":"东风微风","temperature":"21 ~ 19℃"},{"date":"周四","dayPictureUrl":"http://api.map.baidu.com/images/weather/day/xiaoyu.png","nightPictureUrl":"http://api.map.baidu.com/images/weather/night/xiaoyu.png","weather":"小雨","wind":"东南风微风","temperature":"23 ~ 20℃"}]}]}

根据返回的Json定义出相应的数据结构:

public class BaiduTQ{public int error { get; set; }public string status { get; set; }public string date { get; set; }public List<BaiduResult> results { get; set; }}public class BaiduResult{public string currentCity { get; set; }public string pm25 { get; set; }public List<BaiduIndex> index { get; set; }public List<BaiDuWeaterData> weather_data { get; set; }}public class BaiduIndex{public string title { get; set; }public string zs { get; set; }public string tipt { get; set; }public string des { get; set; }}public class BaiDuWeaterData{public string date { get; set; }public string <span style="width: auto; height: auto; float: none;" id="7_nwp"><a style="text-decoration: none;" mpid="7" target="_blank" href="http://cpro.baidu.com/cpro/ui/uijs.php?c=news&cf=1001&ch=0&di=128&fv=16&jk=f75039926fbab791&k=day&k0=day&kdi0=0&luki=2&n=10&p=baidu&q=00007110_cpr&rb=0&rs=1&seller_id=1&sid=91b7ba6f923950f7&ssp2=1&stid=0&t=tpclicked3_hc&tu=u1704338&u=http%3A%2F%2Fwww%2Edaxueit%2Ecom%2Farticle%2F5477%2Ehtml&urlid=0" id="7_nwl"><span style="color:#0000ff;font-size:14px;width:auto;height:auto;float:none;">day</span></a></span>PictureUrl { get; set; }public string nightPictureUrl { get; set; }public string weather { get; set; }public string wind { get; set; }public string temperature { get; set; }}

然后直接通过Newtonsoft.Json 反序列化成即可。

　　既然是获取天气，肯定是希望获取客户所在城市的天气，下一步则是需要根据用户机器IP获取所在城市，然后获取该城市的天气信息。

IP获取城市

　　通过淘宝的IP库,http://ip.taobao.com/,即可查询指定IP所在的城市、国家、运营商等。

　　有了上面的途径，我们下一步的工作就是获取客户的外网IP，而外网IP，是机器连接外网才会有，所以楼主写了一个页面，部署在外网服务器。

　　相关代码如下:

var ip = Request.UserHostAddress;using (var client = new WebClient()){var url = "http://ip.taobao.com/service/getIpInfo.php?ip=" + ip;client.Encoding = Encoding.UTF8;var str = client.DownloadString(url);Response.Write(str);}

　　这样我们就可以获取到客户所在城市的天气数据了。

获取百度新闻

　　最近还有个小需求，获取某某新闻数据，楼主习惯性的查了下百度的相关资料，能通过Rss来获取百度新闻数据。

　　接口地址:http://news.baidu.com/n?cmd=7&loc=0&name=%B1%B1%BE%A9&tn=rss

　　打开后，查看它的源，无非就是xml文件，我们可以将xml文件，序列化成对象，如果没有接触过这类知识，可以看下《xml与对象的序列化和反序列化》。

　　根据它的源，就能轻松定义出数据结构。

[XmlRoot("rss")]
public class Rss
{public Channel channel { get; set; }
}
[XmlRoot("channel")]
public class Channel
{public string title { get; set; }public BaiduImage image { get; set; }public string link { get; set; }public string description { get; set; }public string language { get; set; }public string lastBuildDate { get; set; }public string docs { get; set; }public string generator { get; set; }[XmlElement]public List<Channel_Item> item { get; set; }
}public class BaiduImage
{public string title { get; set; }public string link { get; set; }public string url { get; set; }
}public class Channel_Item
{public string title { get; set; }public string link { get; set; }public string pubDate { get; set; }public string guid { get; set; }public string source { get; set; }public string author { get; set; }public string description { get; set; }
}

序列化的方法很简单。

/// <summary>
/// 反序列化
/// </summary>
public static T Deserialize<T>(string <span style="width: auto; height: auto; float: none;" id="4_nwp"><a style="text-decoration: none;" mpid="4" target="_blank" href="http://cpro.baidu.com/cpro/ui/uijs.php?c=news&cf=1001&ch=0&di=128&fv=16&jk=f75039926fbab791&k=xml&k0=xml&kdi0=0&luki=6&n=10&p=baidu&q=00007110_cpr&rb=0&rs=1&seller_id=1&sid=91b7ba6f923950f7&ssp2=1&stid=0&t=tpclicked3_hc&tu=u1704338&u=http%3A%2F%2Fwww%2Edaxueit%2Ecom%2Farticle%2F5477%2Ehtml&urlid=0" id="4_nwl"><span style="color:#0000ff;font-size:14px;width:auto;height:auto;float:none;">xml</span></a></span>Content)
{XmlSerializer xs = new XmlSerializer(typeof(T));using (StringReader strReader = new StringReader(xmlContent)){XmlReader xmlReader = XmlReader.Create(strReader);return (T)xs.Deserialize(xmlReader);}
}

相关测试代码如下:
见个人CSDN下载中心
http://download.csdn.net/detail/u010416101/8532211