使用HtmlAgilityPack采集墨迹天气中的天气数据

需要解析对应的HTML源码：

<div class="left"><div class="wea_alert clearfix"><ul><li><a href = "https://tianqi.moji.com/aqi/china/jiangxi/hukou-county" >< span class="level level_2"><img src = "https://h5tq.moji.com/tianqi/assets/images/aqi/2.png" alt="88 良"></span><em>88 良</em></a></li></ul></div><div class="wea_weather clearfix"><em>30</em><span><img src = "https://h5tq.moji.com/tianqi/assets/images/weather/w1.png" alt="多云"></span><b>多云</b><strong class="info_uptime">今天17:04更新</strong></div><div class="wea_about clearfix"><span>湿度 50%</span><em>南风3级</em></div><div class="wea_tips clearfix"><span>今日天气提示</span><em>略微偏热，注意衣物变化。</em></div></div><div class="right"><div class="wea_info_avator"><img src = "https://h5tq.moji.com/tianqi/assets//images/avator/icon/2.png" alt="墨迹天气 小墨哥"><div id = "windows_download" >< img src="https://h5tq.moji.com/tianqi/assets//images/icon/avator_windows.png" height="35" alt="Windows 下载"><a href = "http://download.moji001.com/mojiapp/windoz/MoWeatherInstall_1.8.1.1.exe" target="_blank">Windows 下载</a></div></div></div>

接收数据的对象

public class MainInfos{/// <summary>/// 日期/// </summary>public string TodayDate { get; set; } = DateTime.Now.ToString("yyyy年MM月dd日");/// <summary>/// 温度/// </summary>public string  WenduStr { get; set; }/// <summary>/// 风向/// </summary>public string  FengsuStr { get; set; }/// <summary>///气压/// </summary>public string  QiyaStr { get; set; }/// <summary>/// 湿度/// </summary>public string ShiduStr { get; set; }/// <summary>/// 降水/// </summary>public string JiangshuiStr { get; set; }/// <summary>///空气指数/// </summary>public string KongqiZhishuStr { get; set; }/// <summary>/// 天气/// </summary>public string TianqiStr { get; set; }/// <summary>/// 更新时间/// </summary>public string GenxinShijianStr { get; set; }/// <summary>/// j今日提示/// </summary>public string JinriTishi { get; set; }/// <summary>/// 当前天气的图标地址/// </summary>public string ImagePath { get; set; }}

采集数据的方法：

 /// <summary>/// 读取天气数据/// </summary>public  static class ReadFromWeb{public static MainInfos GetFromUrl(string Url){ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls12 | SecurityProtocolType.Tls11 | SecurityProtocolType.Tls;try{ HtmlWeb web = new HtmlWeb();HtmlAgilityPack.HtmlDocument doc = web.Load(Url);HtmlNode rootnode = doc.DocumentNode;MainInfos ThisMainInfos = null;HtmlNodeCollection GetUrlInfoNodes = doc.DocumentNode.SelectNodes("//div[@class='wrap clearfix wea_info']");if (GetUrlInfoNodes != null){ThisMainInfos = new MainInfos();HtmlNode ThisMainNode = GetUrlInfoNodes.FirstOrDefault();string InnerStr = ThisMainNode.InnerHtml;//截取出来进行数据分析重新创建一个操作HtmlDocument DOCJiequ = new HtmlDocument();DOCJiequ.LoadHtml(InnerStr);///获取空气指数HtmlNodeCollection NodesKongqizhishu  = DOCJiequ.DocumentNode.SelectNodes("//div[@class='wea_alert clearfix']");if (NodesKongqizhishu!=null && NodesKongqizhishu.Count >0 ){HtmlNode KongqiZhishuNode = NodesKongqizhishu[0];ThisMainInfos.KongqiZhishuStr = KongqiZhishuNode.InnerText.Replace("\r\n","").Replace(" ","").Trim();} ///获取天气温度 图标HtmlNodeCollection NodesTianqiWendu = DOCJiequ.DocumentNode.SelectNodes("//div[@class='wea_weather clearfix']");if (NodesTianqiWendu != null && NodesTianqiWendu.Count > 0){HtmlNode ThisWenduNode = NodesTianqiWendu[0]; HtmlNodeCollection WenduShowNodes = ThisWenduNode.ChildNodes;HtmlNode WenduCanshuNode = WenduShowNodes.Where(x => x.Name == "em").FirstOrDefault();//温度if (WenduCanshuNode!=null ){ThisMainInfos.WenduStr = WenduCanshuNode.InnerText;}HtmlNode TianqiCanshuNode = WenduShowNodes.Where(x => x.Name == "b").FirstOrDefault();//天气if (TianqiCanshuNode != null){ThisMainInfos.TianqiStr = TianqiCanshuNode.InnerText;}HtmlNode TianqiTubiaoCanshuNode = WenduShowNodes.Where(x => x.Name == "span").FirstOrDefault();//天气图标if (TianqiTubiaoCanshuNode != null){HtmlNode TianqiImageCanshuNode = TianqiTubiaoCanshuNode.FirstChild;//获取image标签ThisMainInfos.ImagePath =TianqiImageCanshuNode.GetAttributeValue("src",string.Empty);}HtmlNode GenxinShijianCanshuNode = WenduShowNodes.Where(x => x.Name == "strong").FirstOrDefault();//更新时间if (GenxinShijianCanshuNode != null){ThisMainInfos.GenxinShijianStr = GenxinShijianCanshuNode.InnerText;} }///获取湿度 风力HtmlNodeCollection NodesShiduFengli= DOCJiequ.DocumentNode.SelectNodes("//div[@class='wea_about clearfix']");if (NodesShiduFengli!=null &&  NodesShiduFengli.Count > 0){HtmlNode ThisShiduFenliNode = NodesShiduFengli[0];HtmlNode ShiduNode = ThisShiduFenliNode.ChildNodes.Where(x=>x.Name == "span").FirstOrDefault() ;//湿度if (ShiduNode != null){ThisMainInfos.ShiduStr = ShiduNode.InnerText;}HtmlNode FenliNode = ThisShiduFenliNode.ChildNodes.Where(x => x.Name == "em").FirstOrDefault();//风力if (FenliNode != null){ThisMainInfos.FengsuStr = FenliNode.InnerText;} }///获取今日提示HtmlNodeCollection NodesJinritishi = DOCJiequ.DocumentNode.SelectNodes("//div[@class='wea_tips clearfix']");if (NodesJinritishi != null && NodesJinritishi.Count > 0){HtmlNode ThisJinriTishiNode = NodesJinritishi[0]; HtmlNode JinriTishiNode = ThisJinriTishiNode.ChildNodes.Where(x => x.Name == "em").FirstOrDefault();//今日提示if (JinriTishiNode != null){ThisMainInfos.JinriTishi = JinriTishiNode.InnerText;} } }return ThisMainInfos;}catch (WebException ex){//连接失败return null;}}}

应用方法：

MainInfos ThisModel =  ReadFromWeb.GetFromUrl("https://tianqi.moji.com/weather/china/jiangxi/hukou-county");if (ThisModel!=null ){MainGrid.DataContext = ThisModel ;}