public AddCityPage()
{
this.InitializeComponent();
this.navigationHelper = new NavigationHelper(this);
this.NavigationCacheMode = Windows.UI.Xaml.Navigation.NavigationCacheMode.Required;
cityService = CityService.GetInstance();
userService = UserService.GetInstance();
resposeCities = new GetCityRespose();
resposeHotCities = new GetHotCityRespose();
resposeUserCity = new GetUserCityRespose();
}
public async Task<GetCityRespose> GetCityAsync()
{
GetCityRespose respose = new GetCityRespose();
respose = await Weather.Utils.JsonSerializeHelper.JsonDeSerializeForFileByInstalledLocationAsync<GetCityRespose>("Data\\Cities.json").ConfigureAwait(false);
return respose;
}
protected async override void OnNavigatedTo(NavigationEventArgs e)
{
this.navigationHelper.OnNavigatedTo(e);
// 获取用户城市数据
resposeUserCity = await userService.GetUserCityAsync();
// 获取城市
resposeCities = await cityService.GetCityAsync();
// 获取人们城市
resposeHotCities = await cityService.GetHotCityAsync(); ;
// 数据绑定
page = new ViewModel.SelectCityPage();
page.Cities = resposeCities.Cities;
page.HotCities = resposeHotCities.Cities;
LayoutRoot.DataContext = page;
}
/// <summary>
/// 此部分中提供的方法只是用于使
/// NavigationHelper 可响应页面的导航方法。
/// <para>
/// 应将页面特有的逻辑放入用于
/// <see cref="NavigationHelper.LoadState"/>
/// 和 <see cref="NavigationHelper.SaveState"/> 的事件处理程序中。
/// 除了在会话期间保留的页面状态之外
/// LoadState 方法中还提供导航参数。
/// </para>
/// </summary>
/// <param name="e">提供导航方法数据和
/// 无法取消导航请求的事件处理程序。</param>
protected async override void OnNavigatedTo(NavigationEventArgs e)
{
this.navigationHelper.OnNavigatedTo(e);
resposeUserCity = await userService.GetUserCityAsync();
if (resposeUserCity == null)
{
isNotFirst = false;
}
else
{
isNotFirst = true;
}
resposeCities = await cityService.GetCityAsync();
resposeHotCities = await cityService.GetHotCityAsync(); ;
page = new ViewModel.SelectCityPage();
page.Cities = resposeCities.Cities;
page.HotCities = resposeHotCities.Cities;
LayoutRoot.DataContext = page;
HardwareButtons.BackPressed += HardwareButtons_BackPressed;
}
