作业要求
- 使用HttpWebRequest或HttpClient访问网络
- 输入城市查天气，快递查询等生活实用功能至少完成一种
- 自行上网查找API（不可与Demo相同！）
- Bonus：完成两种不同的API，且分别为JSON和XML格式
准备工作
选择管理方案的Nuget程序包
搜索httpclient，并安装
具体实现
先给一个粉红少女系的截图，解析Json得到温度，解析Xml得到PM2.5
再给一个文件目录
MainPage.xaml
<Page
x:Class="week7.MainPage"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:local="using:week7"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
mc:Ignorable="d">
<Grid Background="HotPink">
<Grid.RowDefinitions>
<RowDefinition Height="auto"/>
<RowDefinition Height="auto"/>
</Grid.RowDefinitions>
<StackPanel Grid.Row="0">
<Button x:Name="JsonsearchWeather" Content="Json查询天气" Click="searchWeather_Click"></Button>
<TextBox x:Name="JsonlocationInput" Text="北京" Height="50" Width="200"></TextBox>
<TextBox x:Name="JsonweatherResult" Text="hello weather" Height="50" Width="200"></TextBox>
</StackPanel>
<StackPanel Grid.Row="1">
<Button x:Name="XmlsearchWeather" Content="Xml查询天气" Click="XmlsearchWeather_Click"></Button>
<TextBox x:Name="XmllocationInput" Text="北京" Height="50" Width="200"></TextBox>
<TextBox x:Name="XmlweatherResult" Text="hello weather" Height="50" Width="200"></TextBox>
</StackPanel>
</Grid>
</Page>
MainPage.xmal.cs
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.Net;
using System.Net.Http;
using week7;
// https://go.microsoft.com/fwlink/?LinkId=402352&clcid=0x804 上介绍了“空白页”项模板
namespace week7
{
/// <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 searchWeather_Click(object sender, RoutedEventArgs e)
{
try
{
RootObject myWeather = await OpenWeatherMapProxy.GetWeather(JsonlocationInput.Text);
JsonweatherResult.Text = myWeather.results[0].location.name + "的温度是" + myWeather.results[0].now.temperature;
}
catch
{
}
}
private async void XmlsearchWeather_Click(object sender, RoutedEventArgs e)
{
try
{
var XmlmyWeather = await xmlway.GetWeather(XmllocationInput.Text);
XmlweatherResult.Text = XmlmyWeather.results.currentCity + "的PM2.5是 " + XmlmyWeather.results.pm25;
}
catch
{
}
}
}
}
OpenWeatherMapProxy.cs
这个类实现Json的解析
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Net.Http;
using System.Runtime.Serialization;
using System.Runtime.Serialization.Json;
using System.Text;
using System.Threading.Tasks;
using System.Xml;
namespace week7
{
public class OpenWeatherMapProxy
{
public async static Task<RootObject> GetWeather(string location)
{
string link = "https://api.seniverse.com/v3/weather/now.json?key=pw0dibkghhvjjnc6&location=" + location + "&language=zh-Hans&unit=c";
var http = new HttpClient();
//var response = await http.GetAsync("https://api.seniverse.com/v3/weather/now.json?key=pw0dibkghhvjjnc6&location=beijing&language=zh-Hans&unit=c");
var response = await http.GetAsync(link);
var result = await response.Content.ReadAsStringAsync();
var serializer = new DataContractJsonSerializer(typeof(RootObject));
var ms = new MemoryStream(Encoding.UTF8.GetBytes(result));
var data = (RootObject)serializer.ReadObject(ms);
return data;
}
}
[DataContract]
public class Location
{
[DataMember]
public string id { get; set; }
/// <summary>
/// 北京
/// </summary>
[DataMember]
public string name { get; set; }
/// <summary>
///
/// </summary>
[DataMember]
public string country { get; set; }
/// <summary>
/// 北京,北京,中国
[DataMember]
public string path { get; set; }
/// <summary>
///
[DataMember]
public string timezone { get; set; }
/// <summary>
///
[DataMember]
public string timezone_offset { get; set; }
}
[DataContract]
public class Now
{
/// <summary>
/// 多云
[DataMember]
public string text { get; set; }
/// <summary>
///
[DataMember]
public string code { get; set; }
/// <summary>
///
[DataMember]
public string temperature { get; set; }
}
[DataContract]
public class ResultsItem
{
/// <summary>
///
[DataMember]
public Location location { get; set; }
/// <summary>
///
[DataMember]
public Now now { get; set; }
/// <summary>
///
[DataMember]
public string last_update { get; set; }
}
[DataContract]
public class RootObject
{
/// <summary>
///
[DataMember]
public List<ResultsItem> results { get; set; }
}
}
xmlway.cs
这个类实现Xml解析
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Net.Http;
using System.Runtime.Serialization;
using System.Runtime.Serialization.Json;
using System.Text;
using System.Threading.Tasks;
using System.Xml;
using System.Xml.Serialization;
namespace week7
{
public class xmlway
{
public async static Task<CityWeatherResponse> GetWeather(String Location)
{
string link = "http://api.map.baidu.com/telematics/v3/weather?location=" +Location +"&ak=8IoIaU655sQrs95uMWRWPDIa";
var http = new HttpClient();
//var response = await http.GetAsync("http://api.map.baidu.com/telematics/v3/weather?location=%E6%AD%A6%E6%B1%89&ak=8IoIaU655sQrs95uMWRWPDIa");
var response = await http.GetAsync(link);
var result = await response.Content.ReadAsStringAsync();
var serializer = new XmlSerializer(typeof(CityWeatherResponse));
var ms = new MemoryStream(Encoding.UTF8.GetBytes(result));
var data = (CityWeatherResponse)serializer.Deserialize(ms);
return data;
}
public class Weather_data
{
/// <summary>
///
/// </summary>
public List<string> date { get; set; }
/// <summary>
///
/// </summary>
public List<string> dayPictureUrl { get; set; }
/// <summary>
///
/// </summary>
public List<string> nightPictureUrl { get; set; }
/// <summary>
///
/// </summary>
public List<string> weather { get; set; }
/// <summary>
///
/// </summary>
public List<string> wind { get; set; }
/// <summary>
///
/// </summary>
public List<string> temperature { get; set; }
}
public class Index
{
/// <summary>
///
/// </summary>
public List<string> title { get; set; }
/// <summary>
///
/// </summary>
public List<string> zs { get; set; }
/// <summary>
///
/// </summary>
public List<string> tipt { get; set; }
/// <summary>
///
/// </summary>
public List<string> des { get; set; }
}
public class Results
{
/// <summary>
/// 北京
/// </summary>
public string currentCity { get; set; }
/// <summary>
///
/// </summary>
public Weather_data weather_data { get; set; }
/// <summary>
///
/// </summary>
public Index index { get; set; }
/// <summary>
///
/// </summary>
public string pm25 { get; set; }
}
public class CityWeatherResponse
{
/// <summary>
///
/// </summary>
public string error { get; set; }
/// <summary>
///
/// </summary>
public string status { get; set; }
/// <summary>
///
/// </summary>
public string date { get; set; }
/// <summary>
///
/// </summary>
public Results results { get; set; }
}
//public class Root
//{
// /// <summary>
// ///
// /// </summary>
// public CityWeatherResponse CityWeatherResponse { get; set; }
//}
}
}
解释OpenWeatherMapProxy.cs和xmlway.cs
我主要是反序列化Json和xml格式，生成一个class，解析Json都是正常的，解析xml的时候list<string>类型的值为空，不知道原因是什么，所以只得到了PM2.5，虽然可以用GetElementsByTagName，得到想要的变量，感觉那么写就不需要解析了，直接提取了。怎么得到对应Json和xml的类，可以先试一下这个链接测试返回值是Json，把里面的内容全部复制，然后进入Json转Class（似乎被墙了）这个网站，转换一下就OK了，xml也可以用上诉的网站转成Json格式，再用Json格式转成Class，等于几乎不用写代码。
更新与问题解决
先来一张粉嫩少女系的最新截图
最新的版本解决了list<string>的问题,方法是把xml直接转成class，在这个网站可以直接转，xml转c#实体类
xmlway.cs
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Net.Http;
using System.Runtime.Serialization;
using System.Runtime.Serialization.Json;
using System.Text;
using System.Threading.Tasks;
using System.Xml;
using System.Xml.Serialization;
namespace week7
{
public class xmlway
{
public async static Task<CityWeatherResponse> GetWeather(String Location)
{
string link = "http://api.map.baidu.com/telematics/v3/weather?location=" + Location + "&ak=8IoIaU655sQrs95uMWRWPDIa";
var http = new HttpClient();
//var response = await http.GetAsync("http://api.map.baidu.com/telematics/v3/weather?location=%E6%AD%A6%E6%B1%89&ak=8IoIaU655sQrs95uMWRWPDIa");
var response = await http.GetAsync(link);
var result = await response.Content.ReadAsStringAsync();
var serializer = new XmlSerializer(typeof(CityWeatherResponse));
var ms = new MemoryStream(Encoding.UTF8.GetBytes(result));
var data = (CityWeatherResponse)serializer.Deserialize(ms);
return data;
}
}
[XmlRoot(ElementName = "weather_data")]
public class Weather_data
{
[XmlElement(ElementName = "date")]
public List<string> Date { get; set; }
[XmlElement(ElementName = "dayPictureUrl")]
public List<string> DayPictureUrl { get; set; }
[XmlElement(ElementName = "nightPictureUrl")]
public List<string> NightPictureUrl { get; set; }
[XmlElement(ElementName = "weather")]
public List<string> Weather { get; set; }
[XmlElement(ElementName = "wind")]
public List<string> Wind { get; set; }
[XmlElement(ElementName = "temperature")]
public List<string> Temperature { get; set; }
}
[XmlRoot(ElementName = "index")]
public class Index
{
[XmlElement(ElementName = "title")]
public List<string> Title { get; set; }
[XmlElement(ElementName = "zs")]
public List<string> Zs { get; set; }
[XmlElement(ElementName = "tipt")]
public List<string> Tipt { get; set; }
[XmlElement(ElementName = "des")]
public List<string> Des { get; set; }
}
[XmlRoot(ElementName = "results")]
public class Results
{
[XmlElement(ElementName = "currentCity")]
public string CurrentCity { get; set; }
[XmlElement(ElementName = "weather_data")]
public Weather_data Weather_data { get; set; }
[XmlElement(ElementName = "index")]
public Index Index { get; set; }
[XmlElement(ElementName = "pm25")]
public string Pm25 { get; set; }
}
[XmlRoot(ElementName = "CityWeatherResponse")]
public class CityWeatherResponse
{
[XmlElement(ElementName = "error")]
public string Error { get; set; }
[XmlElement(ElementName = "status")]
public string Status { get; set; }
[XmlElement(ElementName = "date")]
public string Date { get; set; }
[XmlElement(ElementName = "results")]
public Results Results { get; set; }
}
}