C# 解析百度天气数据,Rss解析百度新闻以及根据IP获取所在城市

朴灿烈づ我的快乐病毒、 2022-08-07 08:40 219阅读 0赞

接口地址:http://api.map.baidu.com/telematics/v3/weather?location=上海&output=json&ak=hXWAgbsCC9UTkBO5V5Qg1WZ9，其中ak是密钥，自行去申请即可，便于大家测试，楼主就公布并了自己的Key，这样可以直接获取到数据。

获取到的数据是这样的：

{"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，<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">风力</a>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":"<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">紫外线</a>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℃)","<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">day</a>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","<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">day</a>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][Link 1]:

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 <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">day</a>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][Link 1]。

[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 <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">xml</a>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

[Link 1]: http://cpro.baidu.com/cpro/ui/uijs.php?c=news&cf=1001&ch=0&di=128&fv=16&jk=f75039926fbab791&k=%CA%FD%BE%DD%BD%E1%B9%B9&k0=%CA%FD%BE%DD%BD%E1%B9%B9&kdi0=0&luki=1&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
[xml]: 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