WP8.1开发:简单天气预报应用(转)

public   class WeatherData
    {
        public int error { get; set; }
        public string status { get; set; }
        public string date { get; set; }
        public List<resultsList> results { get; set; }
 
        public class resultsList
        {
 
            public string currentCity{ get; set; }
 
            public string pm25 { get; set; }
            public List<indexList> index { get; set; }
            public List<weather_dataList> weather_data { get; set; }
        }
        public struct indexList
        {
            public string title { get; set; }
            public string zs { get; set; }
            public string tipt { get; set; }
            public string des { get; set; }  
 
        }
 
        public struct weather_dataList
        {
            public string  date { get; set; }
            public string weather { get; set; }
            public string wind { get; set; }
            public string temperature { get; set; }
            public Uri dayPictureUrl { get; set; }
            public Uri nightPictureUrl { get; set; }    
      }
    }

<Pivot>
            <PivotItem Header="天气" >
                <ListView Name="listWeather">
                        <ListView.Header >
                                 <StackPanel>
                           <TextBlock x:Name="textCity" FontSize="30"></TextBlock>
                           <TextBlock  x:Name="textPm" FontSize="25"  Foreground="Orange"></TextBlock>
                             </StackPanel>
                         </ListView.Header>
                     <ListView.ItemTemplate  >
                        <DataTemplate>
                            <Border  Width="360"   BorderThickness="2" BorderBrush="#FF2996AE">
                            <StackPanel >
                                <TextBlock Text="{Binding date}" FontSize="25"></TextBlock>
                                <TextBlock Text="{Binding weather}" FontSize="30"></TextBlock>
                                    <StackPanel Orientation="Horizontal">
                                    <Image Source="{Binding dayPictureUrl}" Stretch="Uniform"
                                        Width="60" Height="60"></Image>
                                    <Image Source="{Binding nightPictureUrl}" Stretch="Uniform"
                                       Width="60" Height="60"></Image>
                                    </StackPanel>
                                    <TextBlock Text="{Binding wind}" FontSize="25"></TextBlock>
                                <TextBlock Text="{Binding temperature }" FontSize="30"></TextBlock>
 
                            </StackPanel>
                            </Border>
                        </DataTemplate>
                    </ListView.ItemTemplate>
                </ListView>
            </PivotItem>
            <PivotItem Header="指数">
                <ListView Name="listIndex">
                    <ListView.ItemTemplate  >
                        <DataTemplate>
                            <Border>
                            <StackPanel >
                                    <TextBlock Text="{Binding tipt }" FontSize="25" Foreground="#FF2996AE"></TextBlock>
                                    <TextBlock Text="{Binding zs}" FontSize="30"  Foreground="Green"></TextBlock>
                                 <TextBlock Text="{Binding des }" FontSize="20" TextWrapping="Wrap"></TextBlock>
                            </StackPanel>
                            </Border>
                        </DataTemplate>
                    </ListView.ItemTemplate>
                </ListView>
            </PivotItem>
        </Pivot>
 
    </Grid>
    <Page.BottomAppBar>
        <CommandBar  Background="#FF2996AE">
            <AppBarButton Icon="Sync" Label="刷新" Click="AppBarButton_Click"/>
        </CommandBar>
    </Page.BottomAppBar>

  public sealed partial class MainPage : Page
    {
        private string latitude = null;
        private string longitude = null;
        private string responseText = null;
        private HttpClient httpClient;
        private HttpResponseMessage response;
 
        private Weather.WeatherData.resultsList weather;
 
        public MainPage()
        {
            this.InitializeComponent();
            this.NavigationCacheMode = NavigationCacheMode.Required;
 
            httpClient = new HttpClient();
            var headers = httpClient.DefaultRequestHeaders;//获取每个请求标头的集合
            headers.UserAgent.ParseAdd("ie");
            headers.UserAgent.ParseAdd("Mozilla/5.0 (compatible; MSIE 10.0; Windows NT 6.2; WOW64; Trident/6.0)");
        }
 
        protected  async override void OnNavigatedTo(NavigationEventArgs e)
        {
            Geolocator geolocator = new Geolocator();
            geolocator.DesiredAccuracyInMeters = 50;
            try
            {
                Geoposition geoposition = await geolocator.GetGeopositionAsync(
                    maximumAge: TimeSpan.FromMinutes(5),
                    timeout: TimeSpan.FromSeconds(10));
                latitude = geoposition.Coordinate.Point.Position.Latitude.ToString();
                longitude = geoposition.Coordinate.Point.Position.Longitude.ToString();
            }
            catch (UnauthorizedAccessException)
            {
                        Debug.WriteLine( "无法获取位置信息!");
            }
        }
 
        private  async void AppBarButton_Click(object sender, RoutedEventArgs e)
        {
            response = new HttpResponseMessage();
 
            Uri resourceUri;
            String Address = "http://api.map.baidu.com/telematics/v3/weather?location="+longitude+","+latitude+"&output=json&ak=你的KEY";
            Uri.TryCreate(Address.Trim(), UriKind.Absolute, out resourceUri);
 
            try
            {
                response = await httpClient.GetAsync(resourceUri);
 
                response.EnsureSuccessStatusCode();
 
                responseText = await response.Content.ReadAsStringAsync();
 
            }
            catch (Exception ex)
            {
                Debug.WriteLine("网络请求失败!" + ex.Message.ToString());
 
            }
 
            DataContractJsonSerializer obj = new DataContractJsonSerializer(typeof(WeatherData));
            WeatherData weatherData = obj.ReadObject(new MemoryStream(Encoding.UTF8.GetBytes(responseText))) as WeatherData;
            weather = weatherData.results.FirstOrDefault();
          listWeather.ItemsSource = weather.weather_data;
            listIndex.ItemsSource = weather.index;
             textCity.Text = weather.currentCity.ToString();
            textPm.Text= "PM2.5:"+weather.pm25.ToString();
 
        }