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Windows Phone 7 MVVM模式数据绑定和传递参数
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數(shù)據(jù)綁定使用了ObservableCollection<T> 類來實(shí)現(xiàn)，ViewModel通過繼承GalaSoft.MvvmLight.ViewModelBase類來實(shí)現(xiàn)，Command
使用GalaSoft.MvvmLight.Command.RelayCommand<T>來實(shí)現(xiàn)。
ObservableCollection<T>表示一個(gè)動(dòng)態(tài)數(shù)據(jù)集合，在添加項(xiàng)、移除項(xiàng)或刷新整個(gè)列表時(shí)，此集合將提供通知。
客戶列表綁定客戶的名字、QQ、地址信息，單擊的時(shí)候顯示客戶的全部詳細(xì)信息。
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View層
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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}}">??????????<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}">??????????????????????????????<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>???????????????????????????????<Custom:Interaction.Triggers>???????????????????????????????????<Custom:EventTrigger?EventName="SelectionChanged">?????????????????????????<GalaSoft_MvvmLight_Command:EventToCommand?x:Name="SelectionCommand"?Command="{Binding?DetailsPageCommand,?Mode=OneWay}"?CommandParameter="{Binding?SelectedItem,?ElementName=PersonListBox}"/>???????????????????????????????????????????</Custom:EventTrigger>??????????????</Custom:Interaction.Triggers>??????????</ListBox>????????</Grid>????</Grid>?</phone:PhoneApplicationPage>? ViewModel層
ViewModelLocator是對(duì)ViewModel進(jìn)行初始化和清理的集中處理的類 添加資源的時(shí)候只需要添加這一個(gè)類就可以了。
ViewModelLocator.cs
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namespace?MvvmLight5.ViewModel ?{ ????public?class?ViewModelLocator ????{ ???????private?static?MainViewModel?_main; ????????///?<summary>???????///?初始化??在這里創(chuàng)建ViewModel??可以將多個(gè)ViewModel在這里一起創(chuàng)建 ???????///?</summary>???????public?ViewModelLocator() ???????{ ??????????CreateMain(); ????????} ????????///?<summary>???????///?獲取MainViewModel的靜態(tài)的實(shí)例對(duì)象 ???????///?</summary>???????public?static?MainViewModel?MainStatic ???????{ ???????????get ???????????{ ???????????????if?(_main?==?null) ???????????????{ ???????????????????CreateMain(); ???????????????} ????????????????return?_main; ???????????} ???????} ????????///?<summary>???????///?獲取MainViewModel的實(shí)例對(duì)象 ???????///?</summary>???????public?MainViewModel?Main ???????{ ???????????get ???????????{ ???????????????return?MainStatic; ???????????} ???????} ????????///?<summary>???????///清理MainViewModel?退出程序的時(shí)候進(jìn)行清理??在App.xmal.cs中調(diào)用 ???????///?</summary>???????public?static?void?ClearMain() ???????{ ??????????_main.Cleanup(); ??????????_main?=?null; ???????} ????????///?<summary>???????///?創(chuàng)建MainViewModel ???????///?</summary>???????public?static?void?CreateMain() ???????{ ??????????if?(?_main?==?null?) ??????????{ ?????????????_main?=?new?MainViewModel(); ??????????} ???????} ????} ?}? 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>???????///?數(shù)據(jù)綁定的客戶列表 ???????///?</summary>???????public?ObservableCollection<Customer>?Customers ???????{ ??????????get ??????????{ ?????????????var?customerCollection?=?new?CustomerCollection(); ?????????????return?customerCollection.Customers; ??????????} ???????} ???????//定義Command ???????public?RelayCommand<Customer>?DetailsPageCommand ???????{ ??????????get; ??????????private?set; ???????} ????????public?string?ApplicationTitle ???????{ ??????????get ??????????{ ?????????????return?"MVVM?LIGHT"; ??????????} ???????} ????????public?string?PageName ???????{ ??????????get ??????????{ ?????????????return?"客戶列表如下:"; ??????????} ???????} ????????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("客戶的詳細(xì)資料如下????名字:"?+?msg.Name?+?"??城市:"?+?msg.City?+?"??地址:"?+?msg.Address?+?"??電話:"?+?msg.Phone?+?"??QQ:"?+?msg.QQ); ??????????return?null; ???????} ????} ?}? Model層
Customers.cs
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using?System; ?using?System.Collections.Generic; ?using?System.Collections.ObjectModel; ??namespace?MvvmLight5.Model ?{ ????public?class?CustomerCollection ????{ ???????//在這里綁定數(shù)據(jù)使用了ObservableCollection<T>?類?? ???????private?readonly?ObservableCollection<Customer>?_customers?=?new?ObservableCollection<Customer>(); ???????public?ObservableCollection<Customer>?Customers ???????{ ??????????get?{?return?_customers;?} ???????} ????????public?Customer?GetCustomerByID(?int?id?) ???????{ ??????????return?_customers[?id?]; ???????} ????????public?CustomerCollection() ???????{ ??????????try ??????????{ ?????????????GenerateCustomers(); ??????????} ??????????catch?(?Exception?e?) ??????????{ ?????????????System.Windows.MessageBox.Show(?"Exception:?"?+?e.Message?); ??????????} ???????} ????????//初始化數(shù)據(jù) ???????public?void?GenerateCustomers() ???????{ ?????????????_customers.Add(?new?Customer(1,"黃小琥","臺(tái)灣高雄市十六街8號(hào)","高雄","13457789907","3232","huangxiaohu@qq.com")?); ?????????????_customers.Add(new?Customer(2,?"李開復(fù)",?"北京市東城區(qū)十六街8號(hào)",?"北京",?"136589907",?"787222894",?"huasdsdu@qq.com")); ?????????????_customers.Add(new?Customer(3,?"周杰倫",?"臺(tái)灣臺(tái)北市十六街8號(hào)",?"臺(tái)北",?"145455779907",?"2323266",?"232@qq.com")); ?????????????_customers.Add(new?Customer(4,?"郎咸平",?"香港十六街8號(hào)",?"香港",?"145489907",?"787222894",?"6ggg@qq.com")); ?????????????_customers.Add(new?Customer(5,?"加菲貓",?"高雄市十六街8號(hào)",?"高雄市",?"15777789907",?"333434",?"2323@qq.com")); ?????????????_customers.Add(new?Customer(6,?"灰太狼",?"臺(tái)灣第三代市十六街8號(hào)",?"高雄市",?"134357789907",?"23232",?"3232@qq.com")); ?????????????_customers.Add(new?Customer(7,?"喜洋洋",?"臺(tái)灣高雄市十六街8號(hào)",?"高雄市",?"134544589907",?"23232777",?"88sds@qq.com")); ?????????????_customers.Add(new?Customer(8,?"春哥",?"臺(tái)灣所得稅十六街8號(hào)",?"高雄市",?"13453445907",?"888888",?"sdsgg@qq.com")); ?????????? ???????} ????} ?????public?class?Customer ????{ ???????public?int?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; ??????????PhonePhone?=?Phone; ??????????QQ?=?qq; ??????????Email?=?email; ???????} ????} ?}? App.xaml 程序初始化處理
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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>?????????<vm:ViewModelLocator?x:Key="Locator"??????????????????????????????d:IsDataSource="True"?/>?????</Application.Resources>??????<Application.ApplicationLifetimeObjects>??????????????????<shell:PhoneApplicationService?Launching="Application_Launching"????????????????????????????????????????Closing="Application_Closing"????????????????????????????????????????Activated="Application_Activated"????????????????????????????????????????Deactivated="Application_Deactivated"?/>?????</Application.ApplicationLifetimeObjects>??</Application>? cs
?// 清理ViewModel資源
????? private void Application_Closing( object sender, ClosingEventArgs e )
????? {
???????? ViewModelLocator.ClearMain();
????? }?
轉(zhuǎn)載于:https://blog.51cto.com/linzheng/1078630
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