Windows 8實例教程系列 - 數據綁定高級實例

上篇Windows 8實例教程系列 - 數據綁定基礎實例中，介紹Windows 8應用開發數據綁定基礎，其中包括一些簡單的數據綁定控件的使用。本篇將介紹較爲複雜的數據綁定控件實例，其中包括ListView， GridView，以及GridView分組，GridView分組縮放等綁定功能。

瞭解ListView和GridView數據綁定控件

兩個控件都是繼承自ItemsControl類，在功能上類似，都是在應用中顯示數據集合，但是顯示方式不同。

ListView顯示方式爲垂直堆棧形式，以列表的形式顯示數據；常用於顯示簡潔數據列表，選中選項後顯示詳細數據。

GridView顯示方式是平行堆棧形式，經常會用於顯示較爲豐富的數據集合，例如，相冊列表應用，顯示照片在每個選項。

ListView控件實例

前臺代碼：

<ListView x:Name="lvMainListView" Margin="5"  VerticalAlignment="Top" MaxWidth="400" HorizontalAlignment="Left"
                  ItemTemplate="{StaticResource ContactTemplate}" ScrollViewer.VerticalScrollBarVisibility="Auto" BorderBrush="White" BorderThickness="2" 
                  ScrollViewer.HorizontalScrollBarVisibility="Disabled" SelectionMode="Single"
                  SelectionChanged="lvMainListView_SelectionChanged_1"/>

在ListView中使用了自定義ItemTemplate，自定義設置選項佈局，

<Page.Resources>

        <x:String x:Key="AppName">Windows 8實例教程 - ListView</x:String>

        <Style x:Key="ContactEmailStyle" TargetType="TextBlock">
            <Setter Property="FontFamily" Value="Segoe UI Light"/>
            <Setter Property="FontSize" Value="18"/>
        </Style>

        <Style x:Key="ContactAuthorStyle" TargetType="TextBlock">
            <Setter Property="FontFamily" Value="Segoe UI Light"/>
            <Setter Property="FontSize" Value="14"/>
        </Style>

        <DataTemplate x:Key="ContactTemplate">
            <Grid Margin="10">
                <StackPanel Orientation="Horizontal">
                    <Image Source="{Binding Thumbnail}" Height="60" Width="60" Margin="0,0,10,0"/>
                    <StackPanel Margin="0,0,0,0" Orientation="Vertical">
                        <TextBlock TextWrapping="Wrap" Style="{StaticResource ContactEmailStyle}" 
                                   Text="{Binding Email}" />
                        <TextBlock TextWrapping="Wrap" Style="{StaticResource ContactAuthorStyle}" Text="{Binding Author}" />
                    </StackPanel>
                </StackPanel>
            </Grid>
        </DataTemplate>

    </Page.Resources>

後臺代碼：

public sealed partial class MainPage : Page
    {
        private ObservableCollection<Contact> Contacts = new ObservableCollection<Contact>();

        public MainPage()
        {
            this.InitializeComponent();
            LoadContacts();
        }

        private void LoadContacts()
        {
            Contacts.Add(new Contact
            {
                Email = "[email protected]",
                Author = "Kevin Fan",
                Thumbnail = new BitmapImage(new Uri("ms-appx:///Assets/60Mail01.png", UriKind.RelativeOrAbsolute))
            });

            Contacts.Add(new Contact
            {
                Email = "[email protected]",
                Author = "銀光中國",
                Thumbnail = new BitmapImage(new Uri("ms-appx:///Assets/60Mail02.png", UriKind.RelativeOrAbsolute))
            });

            Contacts.Add(new Contact
            {
                Email = "[email protected]",
                Author = "Sandy Yang",
                Thumbnail = new BitmapImage(new Uri("ms-appx:///Assets/60Mail03.png", UriKind.RelativeOrAbsolute))
            });

            lvMainListView.ItemsSource = Contacts;
        }

        private void lvMainListView_SelectionChanged_1(object sender, SelectionChangedEventArgs e)
        {
            SelectedListItem.Text = String.Format("Selected Contact's Email: {0}", ((Contact)e.AddedItems[0]).Email);
        }
    }

GridView控件

前臺代碼：

<GridView x:Name="gvMainGridView" HorizontalAlignment="Left" Margin="45,30,0,0" Grid.Row="1" VerticalAlignment="Top" MinWidth="200" MinHeight="200"
            ItemTemplate="{StaticResource ContactTemplate}" ItemsPanel="{StaticResource GridViewItemsPanel}"           
            BorderBrush="White" BorderThickness="2" ScrollViewer.VerticalScrollBarVisibility="Auto"
            ScrollViewer.HorizontalScrollBarVisibility="Auto" SelectionMode="Single" Width="800"
            SelectionChanged="gvMainGridView_SelectionChanged_1" />

GridView控件使用兩個自定義Template，分別爲ItemTemplate和ItemsPanel，

<Page.Resources>

        <x:String x:Key="AppName">Windows 8實例教程 - GridView</x:String>
        
        <Style x:Key="ContactEmailStyle" TargetType="TextBlock">
            <Setter Property="FontFamily" Value="Segoe UI Light"/>
            <Setter Property="FontSize" Value="18"/>
        </Style>

        <Style x:Key="ContactAuthorStyle" TargetType="TextBlock">
            <Setter Property="FontFamily" Value="Segoe UI Light"/>
            <Setter Property="FontSize" Value="14"/>
        </Style>

        <DataTemplate x:Key="ContactTemplate">
            <Grid Margin="10">
                <StackPanel Orientation="Horizontal">
                    <Image Source="{Binding Thumbnail}" Height="60" Width="60" Margin="0,0,10,0"/>
                    <StackPanel Margin="0,0,0,0" Orientation="Vertical">
                        <TextBlock TextWrapping="Wrap" Style="{StaticResource ContactEmailStyle}" 
                                   Text="{Binding Email}" />
                        <TextBlock TextWrapping="Wrap" Style="{StaticResource ContactAuthorStyle}" Text="{Binding Author}" />
                    </StackPanel>
                </StackPanel>
            </Grid>
        </DataTemplate>

        <ItemsPanelTemplate x:Key="GridViewItemsPanel">
            <WrapGrid MaximumRowsOrColumns="2" />
        </ItemsPanelTemplate>

    </Page.Resources>

後臺代碼：

public sealed partial class MainPage : Page
    {
        private ObservableCollection<Contact> Contacts = new ObservableCollection<Contact>();
        private CollectionViewSource GroupedItems = new CollectionViewSource { IsSourceGrouped = true };

        public MainPage()
        {
            this.InitializeComponent();
            LoadContacts();
        }

        private void gvMainGridView_SelectionChanged_1(object sender, SelectionChangedEventArgs e)
        {
            SelectedGridItem.Text = String.Format("Selected Contact's Email: {0}", ((Contact)e.AddedItems[0]).Email);
        }

        private void LoadContacts()
        {
            Contacts.Add(new Contact
            {
                Email = "[email protected]",
                Author = "Kevin Fan",
                Thumbnail = new BitmapImage(new Uri("ms-appx:///Assets/60Mail01.png", UriKind.RelativeOrAbsolute))
            });

            Contacts.Add(new Contact
            {
                Email = "[email protected]",
                Author = "銀光中國",
                Thumbnail = new BitmapImage(new Uri("ms-appx:///Assets/60Mail02.png", UriKind.RelativeOrAbsolute))
            });

            Contacts.Add(new Contact
            {
                Email = "[email protected]",
                Author = "Sandy Yang",
                Thumbnail = new BitmapImage(new Uri("ms-appx:///Assets/60Mail03.png", UriKind.RelativeOrAbsolute))
            });


            gvMainGridView.ItemsSource = Contacts;
        }
    }

Windows store應用中，對於GridView控件使用較爲頻繁，下面兩個實例是從GridView擴展而來。

GridView分組

GridView控件分組，通過對於相同對象屬性綁定實現分組功能。該實例分爲Developer，Designer和Manager三組，

前臺代碼：

該實例使用GridView實例中相同模板代碼，這裏不再重複贅述，

<GridView x:Name="gvMainGridView" HorizontalAlignment="Left" Margin="45,30,0,0" Grid.Row="1" VerticalAlignment="Top" MinWidth="200" MinHeight="200"
            ItemTemplate="{StaticResource ContactTemplate}" ItemsPanel="{StaticResource GridViewItemsPanel}"           
            BorderBrush="White" BorderThickness="2" ScrollViewer.VerticalScrollBarVisibility="Auto"
            ScrollViewer.HorizontalScrollBarVisibility="Auto" SelectionMode="Single" MaxWidth="1000" 
            SelectionChanged="gvMainGridView_SelectionChanged_1">
                <GridView.GroupStyle>
                    <GroupStyle>
                        <GroupStyle.HeaderTemplate>
                            <DataTemplate>
                                <TextBlock Text='{Binding Role}' Foreground="White" FontSize="25" Margin="5" />
                            </DataTemplate>
                        </GroupStyle.HeaderTemplate>
                    </GroupStyle>
                </GridView.GroupStyle>
            </GridView>

後臺代碼：

後臺代碼數據源代碼與GridView實例類似，只是在頁面載入時需要對數據源進行分組操作。代碼如下：

private List<Contact> AllContacts = new List<Contact>();
        private CollectionViewSource ContactCollection = new CollectionViewSource { IsSourceGrouped = true, ItemsPath = new PropertyPath("Contacts") };

        public MainPage()
        {
            this.InitializeComponent();
            LoadContacts();
            var groupedContacts = AllContacts.GroupBy(x => x.Role).Select(x => new GroupContactList { Role = x.Key, Contacts = x.ToList() });
            ContactCollection.Source = groupedContacts.ToList();
            gvMainGridView.ItemsSource = ContactCollection.View;
        }

GridView Zoom分組

該實例根據GridView分組功能使用SemanticZoom控件實現數據分組以及縮放功能。

前臺代碼：

<SemanticZoom x:Name="MainZoomControl" HorizontalAlignment="Left" Margin="45,30,0,0" Grid.Row="1" VerticalAlignment="Top">
                <SemanticZoom.ZoomedOutView>
                    <GridView x:Name="gvZoomedOutGridView" MinWidth="200" MinHeight="200"
                    ItemTemplate="{StaticResource ZoomedOutBookTemplate}"
                    BorderBrush="White" BorderThickness="2" ScrollViewer.VerticalScrollBarVisibility="Auto"
                    ScrollViewer.HorizontalScrollBarVisibility="Auto" SelectionMode="Single" MaxWidth="1000" >
                        <GridView.ItemsPanel>
                            <ItemsPanelTemplate>
                                <StackPanel Orientation="Horizontal" VerticalAlignment="Center" HorizontalAlignment="Center" />
                            </ItemsPanelTemplate>
                        </GridView.ItemsPanel>
                    </GridView>
                </SemanticZoom.ZoomedOutView>
                <SemanticZoom.ZoomedInView>
                    <GridView x:Name="gvZoomedInGridView" HorizontalAlignment="Left" Margin="45,30,0,0" Grid.Row="1" VerticalAlignment="Top" MinWidth="200" MinHeight="200"
                    ItemTemplate="{StaticResource ContactTemplate}" ItemsPanel="{StaticResource GridViewItemsPanel}"           
                    BorderBrush="White" BorderThickness="2" ScrollViewer.VerticalScrollBarVisibility="Auto"
                    ScrollViewer.HorizontalScrollBarVisibility="Auto" SelectionMode="Single" MaxWidth="1000"
                              ItemsSource="{Binding Source={StaticResource ContactCollection}}">
                        <GridView.GroupStyle>
                            <GroupStyle>
                                <GroupStyle.HeaderTemplate>
                                    <DataTemplate>
                                        <TextBlock Text='{Binding Role}' Foreground="White" FontSize="25" Margin="5" />
                                    </DataTemplate>
                                </GroupStyle.HeaderTemplate>

                                <GroupStyle.Panel>
                                    <ItemsPanelTemplate>
                                        <VariableSizedWrapGrid Orientation="Vertical" Height="400" />
                                    </ItemsPanelTemplate>
                                </GroupStyle.Panel>
                            </GroupStyle>
                        </GridView.GroupStyle>
                    </GridView>
                </SemanticZoom.ZoomedInView>
            </SemanticZoom>

後代代碼：

private List<GroupContactList> GroupedContacts = new List<GroupContactList>();
        private List<Contact> AllContacts = new List<Contact>();

        public MainPage()
        {
            this.InitializeComponent();
            LoadContacts();

            var groupedContacts = AllContacts.GroupBy(x => x.Role).Select(x => new GroupContactList { Role = x.Key, Contacts = x.ToList() });
            GroupedContacts = groupedContacts.ToList();
            ContactCollection.Source = groupedContacts.ToList();
            gvZoomedOutGridView.ItemsSource = ContactCollection.View.CollectionGroups;

        }

本篇介紹一些較爲複雜的數據綁定控件實例，歡迎留言討論學習。

本篇源代碼

加入QQ羣交流學習：

22308706(一羣) 超級羣500人
37891947(二羣) 超級羣500人
100844510(三羣) 高級羣200人
32679922(四羣) 超級羣500人
23413513(五羣) 高級羣200人
32679955(六羣) 超級羣500人
88585140(八羣) 超級羣500人
128043302(九羣企業應用開發推薦羣) 高級羣200人
101364438(十羣) 超級羣500人

68435160(十一羣企業應用開發推薦羣)超級羣500人

Windows 8實例教程系列 - 數據綁定高級實例

Silverlight動態設置WCF服務Endpoint

輕鬆搭建Windows8雲平臺開發環境

SharePoint 2013技巧分享系列 - Active Directory同步顯示用戶照片

我的友情鏈接

SharePoint 2013常用開發工具分享

Mac下配置sublime實現LaTeX

https://yachay.unat.edu.pe/blog/index.php?comment_area=format_blog&comment_component=blog&comment_co

linux以太網驅動總結