视频地址：
https://channel9.msdn.com/Series/Windows-10-development-for-absolute-beginners/UWP-060-UWP-Weather-Testing-Location-in-the-Phone-Emulator?ocid=EntriesInArea
json2csharp 工具地址 http://json2csharp.chahuo.com/ （这是个坑爹的工具，如果json数据里面有数字开头的类，他的转换不会自动修改，我们的csharp类名是不能用数字开头的）
视频是国外网站 http://json2csharp.com 访问太慢了。
第一步：处理下主界面MainPage.xaml
<Page x:Class="UMPWeather.MainPage" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:local="using:UMPWeather" xmlns:d="http://schemas.microsoft.com/expression/blend/2008" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" mc:Ignorable="d"> <StackPanel> <Button Name="GetWeatherButton" Content="GetWeather" Click="GetWeatherButton_Click"></Button> <TextBlock Name="MyTextBlock"></TextBlock> <Image Name="WeatherImage"></Image> </StackPanel> </Page> View Code第二步：工具=》NuGet包管理器=》管理解决方案的NUGet包=》搜索“http”=》添加microsoft.net.http程序包
第三步：通过webAPI获取天气数据，视频里面用的是openWeatherMap，外国服务器这么慢，用国内的咯，查了下，只有个中国天气网，还有腾讯百度提供的天气API，但是全都要注册，麻烦，我想就直接网页抓取就好了。于是写了个方法来获取这些数据
1 using System; 2 using System.Collections.Generic; 3 using System.Linq; 4 using System.Text; 5 using System.Threading.Tasks; 6 using System.Net.Http; 7 using System.Text.RegularExpressions; 8 using Windows.UI.Xaml.Controls; 9 10 namespace UMPWeather 11 { 12 public class WeatherManager 13 { 14 15 private static async Task<List<string>> getWeatherDataByBaiduAsync() 16 { 17 18 try 19 { 20 List<string> weatherList = new List<string>(); 21 var http = new HttpClient(); 22 var responseString = await http.GetStringAsync("http://www.baidu.com/s?wd=本地天气"); 23 const string regexWeatherString = @"op_weather4_twoicon_today([\s\S]+?)</a>";//匹配 24 MatchCollection myMatch = Regex.Matches(responseString, regexWeatherString); 25 //这个获取到3条数据 第二条是我们要的。 26 #region 获得的数据 27 28 /*op_weather4_twoicon_today OP_LOG_LINK" target="_blank" href='http://www.baidu.com/link?url=IIr1VEd89cnNmtp5DztMt2B_t3rXTE2tjBV8TXaqSThssbE0vKYCwiJiNjO2pfNj3R2FuLM13eV64pcgSQlZ8q' data-click='{"url":"http://www.weather.com.cn/weather/101200501.shtml"}' weath-bg='cloudy' weath-eff='[]'> 29 <p class="op_weather4_twoicon_date"> 30 31 32 周三 05月04日 农历三月廿八 (实时：27℃) 33 </p> 34 35 <div class="op_weather4_twoicon_icon" style="background:url(http://s1.bdstatic.com/r/www/aladdin/img/new_weath/bigicon/3.png);*background:none;*filter:progid:DXImageTransform.Microsoft.AlphaImageLoader(src=http://s1.bdstatic.com/r/www/aladdin/img/new_weath/bigicon/3.png)"></div> 36 37 <p class="op_weather4_twoicon_temp">29 ~ 20<sup>℃</sup></p> 38 <p class="op_weather4_twoicon_weath" 39 title=""> 40 41 阴 42 43 </p> 44 <p class="op_weather4_twoicon_wind">微风</p> 45 46 <p class="op_weather4_twoicon_pm25">实时空气质量: 47 <em style="background:#afdb00"><b>75</b> 良</em> 48 </p> 49 </a>*/ 50 #endregion 51 string ResultString = myMatch[1].ToString(); 52 //一共5个p 分别对应date,temp,weath,wind,pm25 53 const string regexPString = @"<p([\s\S]+?)</p>";//匹配全部的段落 54 myMatch = Regex.Matches(ResultString, regexPString); 55 56 foreach (var item in myMatch) 57 { 58 59 //去除文本中的全部空格 60 string a = item.ToString(); 61 a=a.Replace(" ", ""); 62 a=a.Replace("\n", ""); 63 a=a.Replace(" ", " "); 64 65 //匹配所有标签 66 const string regexString1 = @"<([\s\S]+?)>"; 67 //去除标签 68 a= Regex.Replace(a, regexString1,""); 69 //将今天的天气数据放在天气清单里面 70 weatherList.Add(a); 71 } 72 return weatherList; 73 } 74 catch (Exception ) 75 { 76 77 throw ; 78 79 } 80 } 81 public static async Task<Weather> GetWeatherAsync(Weather weatherToday) 82 { 83 List<string> weatherList = await getWeatherDataByBaiduAsync(); 84 85 if (weatherList.Count == 5) 86 { 87 weatherToday.Data = weatherList[0]; 88 weatherToday.Temp = weatherList[1]; 89 weatherToday.Weath = weatherList[2]; 90 weatherToday.Wind = weatherList[3]; 91 weatherToday.PM25 = weatherList[4]; 92 93 } 94 return weatherToday; 95 } 96 97 } 98 public class Weather 99 { 100 public string Data { get; set; } 101 public string Temp { get; set; } 102 public string Weath { get; set; } 103 public string Wind { get; set; } 104 public string PM25 { get; set; } 105 106 107 } 108 } View Code
第四步：调用看下结果
using System; using System.Collections.Generic; using System.IO; using System.Linq; using System.Runtime.InteropServices.WindowsRuntime; using Windows.Foundation; using Windows.Foundation.Collections; using Windows.UI.Xaml; using Windows.UI.Xaml.Controls; using Windows.UI.Xaml.Controls.Primitives; using Windows.UI.Xaml.Data; using Windows.UI.Xaml.Input; using Windows.UI.Xaml.Media; using Windows.UI.Xaml.Navigation; using System.Text; //“空白页”项模板在 http://go.microsoft.com/fwlink/?LinkId=402352&clcid=0x409 上有介绍 namespace UMPWeather { /// <summary> /// 可用于自身或导航至 Frame 内部的空白页。 /// </summary> public sealed partial class MainPage : Page { public MainPage() { this.InitializeComponent(); } private async void GetWeatherButton_Click(object sender, RoutedEventArgs e) { var weatherToday = await WeatherManager.GetWeatherAsync(new Weather()); WeatherListBox.Items.Add(weatherToday.Data); WeatherListBox.Items.Add(weatherToday.Temp); WeatherListBox.Items.Add(weatherToday.Weath); WeatherListBox.Items.Add(weatherToday.Wind); WeatherListBox.Items.Add(weatherToday.PM25); } } }这个是程序运行结果
转载于:https://www.cnblogs.com/alasq/p/5458591.html
