机票预定页

（1）XAML

DataContext="{Binding BookFlight, Source={StaticResource Locator}}"

（2） XAML

SupportedOrientations="Portrait"

Orientation="Portrait"

shell:SystemTray.IsVisible="False"

（3）XAML

 <i:Interaction.Triggers>

        <i:EventTrigger EventName="BackKeyPress">

            <cmd:EventToCommand  Command="{Binding BackKeyPressCommand}"/>

        </i:EventTrigger>

 </i:Interaction.Triggers>

一是触发器的详细介绍；而是BackKeyPressCommand的使用。

BackKeyPressCommand = new RelayCommand(() =>

{

       _isLoad = true;

 });

（4）查看StaticSource的定义处

（5）

<CustomAppBar:BindableApplicationBar x:Name="AppBar" Mode="Default" BarOpacity="1"  IsMenuEnabled="True"  >

            <CustomAppBar:BindableApplicationBarIconButton Command="{Binding FlightSearchCollectCommand}" IsEnabled="True"  IconUri="Images/appbar/appbar_history.png" Text="查询历史" />

            <CustomAppBar:BindableApplicationBarIconButton Command="{Binding AirTicketSearchCommand}" IsEnabled="True"  IconUri="Images/appbar/appbar_search.png" Text="搜索" />

            <!--<CustomAppBar:BindableApplicationBarIconButton Command="{Binding AirFlightCollectCommand}" IsEnabled="True"  IconUri="Images/appbar/appbar_collect.png" Text="航班收藏" />-->

            <CustomAppBar:BindableApplicationBar.MenuItems>

                <CustomAppBar:BindableApplicationBarMenuItem  Text="航班收藏"  Command="{Binding AirFlightCollectCommand}"/>

            </CustomAppBar:BindableApplicationBar.MenuItems>

</CustomAppBar:BindableApplicationBar>

CustomAppBar:BindableApplicationBar
（6）BookFlightVM.cs

 public BookFlightVM()

 {

       NavigationHelper.NavigatedMsgReg(this);

       CreateCommands();

  }

NavigationHelper.NavigatedMsgReg(this);

注册导航完成MSG
（7）BookFlightVM.cs

 #region StartCity   出发城市

        private Airport _startCity = App.Settings.PreferredDepartureAirport;

        public Airport StartCity

        {

            get { return _startCity; }

            set

            {

                if (_startCity != value)

                {

                    _startCity = value;

                    RaisePropertyChanged("StartCity");

                }

            }

        }

#endregion

App.Settings.PreferredDepartureAirport;

（8）XAML

<Controls:FlightCitySelectionControl  FlightCity="{Binding StartCity,Mode=TwoWay}"  Grid.Row="1"/>

城市选择

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