Windows Phone 7 MVVM模式数据绑定和传递参数

 

数据绑定使用了ObservableCollection<T> 类来实现,ViewModel通过继承GalaSoft.MvvmLight.ViewModelBase类来实现,Command

使用GalaSoft.MvvmLight.Command.RelayCommand<T>来实现。

ObservableCollection<T>表示一个动态数据集合,在添加项、移除项或刷新整个列表时,此集合将提供通知。

客户列表绑定客户的名字、QQ、地址信息,单击的时候显示客户的全部详细信息。

View层

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<phone:PhoneApplicationPage xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:phone="clr-namespace:Microsoft.Phone.Controls;assembly=Microsoft.Phone"
xmlns:shell="clr-namespace:Microsoft.Phone.Shell;assembly=Microsoft.Phone"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:Custom="clr-namespace:System.Windows.Interactivity;assembly=System.Windows.Interactivity"
xmlns:GalaSoft_MvvmLight_Command="clr-namespace:GalaSoft.MvvmLight.Command;assembly=GalaSoft.MvvmLight.Extras.WP7"
x:Class="MvvmLight5.MainPage" FontFamily="{StaticResource PhoneFontFamilyNormal}" FontSize="{StaticResource PhoneFontSizeNormal}" Foreground="{StaticResource PhoneForegroundBrush}" SupportedOrientations="Portrait" Orientation="Portrait"
mc:Ignorable="d" d:DesignWidth="480" d:DesignHeight="768" shell:SystemTray.IsVisible="True"
DataContext="{Binding Main, Source={StaticResource Locator}}">
<!--绑定ViewModel中的Main实例对象 资源在App.xaml中进行了加载-->
<Grid x:Name="LayoutRoot" Background="Transparent">
  <Grid.RowDefinitions><RowDefinition Height="Auto"/><RowDefinition Height="*"/></Grid.RowDefinitions>
<StackPanel x:Name="TitlePanel" Grid.Row="0" Margin="24,24,0,12">
  <TextBlock x:Name="ApplicationTitle" Text="{Binding ApplicationTitle}" Style="{StaticResource PhoneTextNormalStyle}"/><TextBlock x:Name="PageTitle" Text="{Binding PageName}" Margin="-3,-8,0,0" Style="{StaticResource PhoneTextTitle1Style}"/>
</StackPanel>
<Grid x:Name="ContentGrid" Grid.Row="1">
  <ListBox x:Name="PersonListBox" Margin="10" ItemsSource="{Binding Customers}">
  <!--绑定MainViewModel的Customers数据-->
  <ListBox.ItemTemplate>
    <DataTemplate>
      <StackPanel>
        <StackPanel x:Name="DataTemplateStackPanel" Orientation="Horizontal">
            <TextBlock x:Name="Name" Text="{Binding Name}" Margin="0,0,5,0" Style="{StaticResource PhoneTextExtraLargeStyle}"/><TextBlock x:Name="QQ" Text="{Binding QQ}" Margin="0" Style="{StaticResource PhoneTextExtraLargeStyle}"/>
        </StackPanel><TextBlock x:Name="Email" Text="{Binding Address}" Margin="0" Style="{StaticResource PhoneTextSubtleStyle}"/>
      </StackPanel>
    </DataTemplate>
    </ListBox.ItemTemplate>
    <!--添加System.Windows.Interactivity触发器处理事件,放在ListBox里面-->
    <Custom:Interaction.Triggers>
    <!--当选中客户的时候触发该事件-->
    <Custom:EventTrigger EventName="SelectionChanged">
    <GalaSoft_MvvmLight_Command:EventToCommand x:Name="SelectionCommand" Command="{Binding DetailsPageCommand, Mode=OneWay}" CommandParameter="{Binding SelectedItem, ElementName=PersonListBox}"/><!--传递的参数为ListBox选中的Customer对象--></Custom:EventTrigger></Custom:Interaction.Triggers>         </ListBox>
    
</Grid>
 </Grid>
</phone:PhoneApplicationPage>
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ViewModel层

ViewModelLocator是对ViewModel进行初始化和清理的集中处理的类  添加资源的时候只需要添加这一个类就可以了。

ViewModelLocator.cs

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namespace MvvmLight5.ViewModel
{
  public class ViewModelLocator { privatestatic MainViewModel _main;
///<summary>/// 初始化 在这里创建ViewModel 可以将多个ViewModel在这里一起创建 ///</summary>
  public ViewModelLocator()
  {
    CreateMain();
  }
///<summary>/// 获取MainViewModel的静态的实例对象 ///</summary>
  public static MainViewModel MainStatic
  {
    get {
      if (_main ==null)
        {
          CreateMain();
        }
        return _main;
      }
}
     
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MainViewModel.cs

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using System.Collections.ObjectModel;
using GalaSoft.MvvmLight;
using GalaSoft.MvvmLight.Command;
using MvvmLight5.Model;
namespace MvvmLight5.ViewModel
{
    public class MainViewModel : ViewModelBase
    {
      ///<summary>/// 数据绑定的客户列表 ///</summary>
      public ObservableCollection<Customer> Customers
      {
        get
        {
          var customerCollection =new CustomerCollection();
          return customerCollection.Customers;
        }
       }
        
        //定义Command
        public RelayCommand<Customer> DetailsPageCommand { get; privateset; }
        public string ApplicationTitle { get { return"MVVM LIGHT"; } }
        public string PageName { get { return"客户列表如下:"; } }
        public string Welcome { get { return"Welcome to MVVM Light"; }
      }
        ///<summary>/// 初始化 MainViewModel
        ///</summary>
      public MainViewModel()
      {
        //初始化Command
        DetailsPageCommand =new RelayCommand<Customer>( ( msg ) => GoToDetailsPage( msg ) );
      }
      private object GoToDetailsPage( Customer msg )
      {
        System.Windows.MessageBox.Show("客户的详细资料如下 名字:"+ msg.Name +" 城市:"+ msg.City +" 地址:"+ msg.Address +" 电话:"+ msg.Phone +" QQ:"+ msg.QQ); returnnull;
      }
    }
  }
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Model层

Customers.cs

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using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
namespace MvvmLight5.Model
{
    publicclass CustomerCollection
    {
      //在这里绑定数据使用了ObservableCollection<T> 类
      private readonly ObservableCollection<Customer> _customers =new ObservableCollection<Customer>();
      public Observable Collection<Customer> Customers { get { return _customers; } }
      public Customer GetCustomerByID( int id ) { return _customers[ id ]; }
      public Customer Collection()
      {
        try
        {
          GenerateCustomers();
        }
        catch ( Exception e )
        {
          System.Windows.MessageBox.Show( "Exception: "+ e.Message );
        }
      }
        //初始化数据
        public void GenerateCustomers()
        {
            _customers.Add( new Customer(1,"黄小琥","台湾高雄市十六街8号","高雄","13457789907","3232","huangxiaohu@qq.com") );
            _customers.Add(new Customer(2, "李开复", "北京市东城区十六街8号", "北京", "136589907", "787222894", "huasdsdu@qq.com"));
            _customers.Add(new Customer(3, "周杰伦", "台湾台北市十六街8号", "台北", "145455779907", "2323266", "232@qq.com"));
            _customers.Add(new Customer(4, "郎咸平", "香港十六街8号", "香港", "145489907", "787222894", "6ggg@qq.com"));
            _customers.Add(new Customer(5, "加菲猫", "高雄市十六街8号", "高雄市", "15777789907", "333434", "2323@qq.com"));
            _customers.Add(new Customer(6, "灰太狼", "台湾第三代市十六街8号", "高雄市", "134357789907", "23232", "3232@qq.com"));
            _customers.Add(new Customer(7, "喜洋洋", "台湾高雄市十六街8号", "高雄市", "134544589907", "23232777", "88sds@qq.com"));
            _customers.Add(new Customer(8, "春哥", "台湾所得税十六街8号", "高雄市", "13453445907", "888888", "sdsgg@qq.com")); }
        }

        public class Customer { publicint ID { get; set; }
        public string Name { get ; set; }
        public string Address { get; set; }
        public string City { get; set; }
        public string Phone { get; set; }
        public string QQ { get; set; }
        public string Email { get; set; }
        public Customer() { }
        public Customer( int id, string name, string address, string city, string phone, string qq, string email )
        {
          ID = id; Name = name; Address = address; City = city; Phone = Phone; QQ = qq; Email = email; }
        }
}
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App.xaml 程序初始化处理

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<Application x:Class="MvvmLight5.App" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:phone="clr-namespace:Microsoft.Phone.Controls;assembly=Microsoft.Phone"
xmlns:shell="clr-namespace:Microsoft.Phone.Shell;assembly=Microsoft.Phone"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
mc:Ignorable="d" xmlns:vm="clr-namespace:MvvmLight5.ViewModel">
<!--Application Resources-->
<Application.Resources>
  <vm:ViewModelLocator x:Key="Locator" d:IsDataSource="True"/>
</Application.Resources>
<Application.ApplicationLifetimeObjects>
<!--Required object that handles lifetime events for the application-->
  <shell:PhoneApplicationService Launching="Application_Launching" Closing="Application_Closing" Activated="Application_Activated" Deactivated="Application_Deactivated"/>
</Application.ApplicationLifetimeObjects>
</Application>
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cs

// 清理ViewModel资源
private  void Application_Closing( object sender, ClosingEventArgs e )
{
  ViewModelLocator.ClearMain();
}

posted on 2013-04-22 17:01  小 鬼  阅读(208)  评论(0编辑  收藏  举报

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