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/ 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>
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 //去除文本中的全部空格
59 string a = item.ToString();
60 a.Replace(" ", "");
61
62 //将今天的天气数据放在天气清单里面
63 weatherList.Add(a);
64 }
65 return weatherList;
66 }
67 catch (Exception )
68 {
69
70 throw ;
71
72 }
73 }
74 public static async Task<Weather> GetWeatherAsync(Weather weatherToday)
75 {
76 List<string> weatherList = await getWeatherDataByBaiduAsync();
77
78 if (weatherList.Count == 5)
79 {
80 weatherToday.Data = weatherList[0];
81 weatherToday.Temp = weatherList[1];
82 weatherToday.Weath = weatherList[2];
83 weatherToday.Wind = weatherList[3];
84 weatherToday.PM25 = weatherList[4];
85
86 }
87 return weatherToday;
88 }
89
90 }
91 public class Weather
92 {
93 public string Data { get; set; }
94 public string Temp { get; set; }
95 public string Weath { get; set; }
96 public string Wind { get; set; }
97 public string PM25 { get; set; }
98
99
100 }
101 }
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
还要做些后续处理，不过不管怎样，数据总算是能获取到了。
时间： 2024-08-01 09:14:24