背水一战 Windows 10 (50)

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背水一战 Windows 10 (50) - 控件（集合类）: ItemsControl - 基础知识, 数据绑定, ItemsPresenter, GridViewItemPresenter, ListViewItemPresenter　　
作者：webabcd

介绍
背水一战 Windows 10 之 控件（集合类 - ItemsControl）

• 基础知识
  
• 数据绑定
  
• ItemsPresenter
  
• GridViewItemPresenter
  
• ListViewItemPresenter
  

　　
示例
1、ItemsControl 的基础知识
Controls/CollectionControl/ItemsControlDemo/ItemsControlDemo1.xaml



<Page
x:Class="Windows10.Controls.CollectionControl.ItemsControlDemo.ItemsControlDemo1"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:local="using:Windows10.Controls.CollectionControl.ItemsControlDemo"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
mc:Ignorable="d">
<Grid Background="Transparent">
<StackPanel Margin="10 0 10 10">
<!--
ItemsControl - 集合控件
Items - 项集合（[ContentProperty(Name = "Items")]）
ItemsPanel - 用于指定 items 的布局控件，任何 Panel 类型的布局控件均可，所有 items 将在 Panel 内显示（Panel 是所有 items 的容器）
给 ItemsControl 用的，可虚拟化的布局控件有：ItemsStackPanel, ItemsWrapGrid, VirtualizingStackPanel, WrapGrid. 请参见：/Controls/CollectionControl/ItemsControlDemo/LayoutControl/
ItemContainerTransitions - 指定 ItemsControl 的项容器的过渡效果
-->
<ItemsControl Name="itemsControl" Margin="5" HorizontalAlignment="Left">
<ItemsControl.Items>
<Rectangle Width="100" Height="100" Fill="Red" />
<Rectangle Width="100" Height="100" Fill="Green" />
<Rectangle Width="100" Height="100" Fill="Blue" />
</ItemsControl.Items>
<ItemsControl.ItemsPanel>
<ItemsPanelTemplate>
<StackPanel Orientation="Horizontal" />
</ItemsPanelTemplate>
</ItemsControl.ItemsPanel>
<ItemsControl.ItemContainerTransitions>
<TransitionCollection>
<EntranceThemeTransition FromVerticalOffset="1000"/>
</TransitionCollection>
</ItemsControl.ItemContainerTransitions>
</ItemsControl>
<TextBlock Name="lblMsg" Margin="5 " />
</StackPanel>
</Grid>
</Page>
　　Controls/CollectionControl/ItemsControlDemo/ItemsControlDemo1.xaml.cs



/*
* ItemsControl - 集合控件（继承自 Control, 请参见 /Controls/BaseControl/ControlDemo/）
*     ItemsPanelRoot - 用于获取 items 的布局控件（返回一个 Panel 类型的对象）
*     
*
* 本例用于演示 ItemsControl 的基础知识
*/
using Windows.UI.Xaml;
using Windows.UI.Xaml.Controls;
namespace Windows10.Controls.CollectionControl.ItemsControlDemo
{
public sealed partial class ItemsControlDemo1 : Page
{
public ItemsControlDemo1()
{
this.InitializeComponent();
this.Loaded += ItemsControlDemo1_Loaded;
}
private void ItemsControlDemo1_Loaded(object sender, RoutedEventArgs e)
{
lblMsg.Text = "items 的布局控件: " + itemsControl.ItemsPanelRoot.GetType().ToString();
}
}
}
　　
2、ItemsControl 的数据绑定
Controls/CollectionControl/ItemsControlDemo/ItemsControlDemo2.xaml



<Page
x:Class="Windows10.Controls.CollectionControl.ItemsControlDemo.ItemsControlDemo2"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:local="using:Windows10.Controls.CollectionControl.ItemsControlDemo"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
mc:Ignorable="d"
xmlns:common="using:Windows10.Common">
<Grid Background="Transparent">
<StackPanel Margin="10 0 10 10" Orientation="Horizontal">
<!--
ItemsControl - 集合控件
ItemsSource - 数据源
DisplayMemberPath - 每个数据项需要显示的字段
-->
<ItemsControl Name="itemsControl" Margin="5" Width="400" Height="400" HorizontalAlignment="Left" VerticalAlignment="Top"
ItemsSource="{x:Bind Employees}" DisplayMemberPath="Name" />

<!--
ItemsControl - 集合控件
ItemsPanel - 用于指定 items 的布局控件，任何 Panel 类型的布局控件均可，所有 items 将在 Panel 内显示（Panel 是所有 items 的容器）
给 ItemsControl 用的，可虚拟化的布局控件有：ItemsStackPanel, ItemsWrapGrid, VirtualizingStackPanel, WrapGrid. 请参见：/Controls/CollectionControl/ItemsControlDemo/LayoutControl/
ItemContainerStyle - 每个数据项的容器的样式
ListView 的 ItemContainer 是 ListViewItem
GridView 的 ItemContainer 是 GridViewItem
ItemTemplate - 每个数据项的数据模板
-->
<ListView Name="listView" Margin="5" Width="400" Height="400" HorizontalAlignment="Left" VerticalAlignment="Top"
ItemsSource="{x:Bind Employees}">
<ListView.ItemTemplate>
<DataTemplate x:DataType="common:Employee">
<Grid Background="Red">
<TextBlock Text="{x:Bind Name}" />
</Grid>
</DataTemplate>
</ListView.ItemTemplate>
<ListView.ItemsPanel>
<ItemsPanelTemplate>
<StackPanel Orientation="Vertical" />
</ItemsPanelTemplate>
</ListView.ItemsPanel>
<ListView.ItemContainerStyle>
<Style TargetType="ListViewItem">
<Setter Property="Padding" Value="10" />
<Setter Property="Background" Value="Orange" />
</Style>
</ListView.ItemContainerStyle>
</ListView>
</StackPanel>
</Grid>
</Page>
　　Controls/CollectionControl/ItemsControlDemo/ItemsControlDemo2.xaml.cs



/*
* ItemsControl - 集合控件（继承自 Control, 请参见 /Controls/BaseControl/ControlDemo/）
*     DependencyObject ContainerFromIndex(int index) - 获取指定索引位置的 item 的 container
*     DependencyObject ContainerFromItem(object item) - 获取指定数据对象的 item 的 container
*     int IndexFromContainer(DependencyObject container) - 获取指定 ItemContainer 的索引位置
*     object ItemFromContainer(DependencyObject container) - 获取指定 ItemContainer 的绑定对象
*     
*
* 本例用于演示 ItemsControl 的数据绑定
*/
using System.Collections.ObjectModel;
using Windows.UI.Xaml;
using Windows.UI.Xaml.Controls;
using System.Linq;
using Windows10.Common;
namespace Windows10.Controls.CollectionControl.ItemsControlDemo
{
public sealed partial class ItemsControlDemo2 : Page
{
public ObservableCollection<Employee> Employees { get; set; } = TestData.GetEmployees(100);
public ItemsControlDemo2()
{
this.InitializeComponent();
listView.Loaded += ListView_Loaded;
}
private void ListView_Loaded(object sender, RoutedEventArgs e)
{
// 获取第 4 条数据的 ItemContainer
ListViewItem itemContainer1 = listView.ContainerFromIndex(3) as ListViewItem;
// 获取第 1 条数据的 ItemContainer
ListViewItem itemContainer2 = listView.ContainerFromItem(Employees.First()) as ListViewItem;
// 获取 itemContainer1 的索引位置
int index = listView.IndexFromContainer(itemContainer1);
// 获取 itemContainer2 的绑定对象
Employee employee = listView.ItemFromContainer(itemContainer2) as Employee;
}
}
}
　　
3、ItemsPresenter - 用来呈现 ItemsControl 的 Items
Controls/CollectionControl/ItemsControlDemo/ItemsPresenterDemo.xaml



<Page
x:Class="Windows10.Controls.CollectionControl.ItemsControlDemo.ItemsPresenterDemo"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:local="using:Windows10.Controls.CollectionControl.ItemsControlDemo"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
mc:Ignorable="d">
<Grid Background="Transparent">
<StackPanel Margin="10 0 10 10">
<!--
ItemsPresenter - 用来呈现 ItemsControl 的 Items
Padding - 全部 Items 与 ItemsPresenter 之间的 Padding
Header, HeaderTemplate, Footer, HeaderTransitions - 顾名思义，不用解释
HeaderTransitions - header 的过渡效果
FooterTransitions - footer 的过渡效果
-->
<ItemsControl Margin="5" HorizontalAlignment="Left">
<ItemsControl.Items>
<Rectangle Width="100" Height="100" Fill="Red" />
<Rectangle Width="100" Height="100" Fill="Green" />
<Rectangle Width="100" Height="100" Fill="Blue" />
</ItemsControl.Items>
<ItemsControl.Template>
<ControlTemplate>
<Border BorderBrush="Orange" BorderThickness="1" Width="400" Height="400">
<ItemsPresenter VerticalAlignment="Center" HorizontalAlignment="Center"
Padding="0">
<ItemsPresenter.HeaderTemplate>
<DataTemplate>
<TextBlock Text="header" Foreground="Orange" />
</DataTemplate>
</ItemsPresenter.HeaderTemplate>
<ItemsPresenter.FooterTemplate>
<DataTemplate>
<TextBlock Text="footer" Foreground="Orange" />
</DataTemplate>
</ItemsPresenter.FooterTemplate>
<ItemsPresenter.HeaderTransitions>
<TransitionCollection>
<EntranceThemeTransition FromVerticalOffset="1000"/>
</TransitionCollection>
</ItemsPresenter.HeaderTransitions>
<ItemsPresenter.FooterTransitions>
<TransitionCollection>
<EntranceThemeTransition FromVerticalOffset="1000"/>
</TransitionCollection>
</ItemsPresenter.FooterTransitions>
</ItemsPresenter>
</Border>
</ControlTemplate>
</ItemsControl.Template>
</ItemsControl>
</StackPanel>
</Grid>
</Page>
　　Controls/CollectionControl/ItemsControlDemo/ItemsPresenterDemo.xaml.cs



/*
* ItemsPresenter - 用来呈现 ItemsControl 的 Items（继承自 FrameworkElement, 请参见 /Controls/BaseControl/FrameworkElementDemo/）
*/
using Windows.UI.Xaml.Controls;
namespace Windows10.Controls.CollectionControl.ItemsControlDemo
{
public sealed partial class ItemsPresenterDemo : Page
{
public ItemsPresenterDemo()
{
this.InitializeComponent();
}
}
}
　　
4、GridViewItemPresenter 和 ListViewItemPresenter - 用于呈现 GridView 或 ListView 的 Item
Controls/CollectionControl/ItemsControlDemo/ItemPresenterDemo.xaml



<Page
x:Class="Windows10.Controls.CollectionControl.ItemsControlDemo.ItemPresenterDemo"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:local="using:Windows10.Controls.CollectionControl.ItemsControlDemo"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
mc:Ignorable="d">
<Page.Resources>
<Style x:Key="MyGridViewItemPresenterTemplate" TargetType="GridViewItem">
<Setter Property="Background" Value="Transparent"/>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="GridViewItem">
<!--
GridViewItemPresenter 和 ListViewItemPresenter - 用于呈现 GridView 或 ListView 的 Item
Margin - item 的 margin
SelectionCheckMarkVisualEnabled - 是否显示选中状态的标记
SelectedBorderThickness - 选中状态的边框粗细
SelectedBackground - 选中状态的边框颜色
CheckBrush - 选中状态的图标（本例就是那个小对勾）
...... - 还有好多好多，看文档吧
-->
<GridViewItemPresenter Margin="10" SelectionCheckMarkVisualEnabled="True" SelectedBorderThickness="3" SelectedBackground="Red" CheckBrush="{ThemeResource ListViewItemCheckThemeBrush}"/>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
</Page.Resources>
<Grid Background="Transparent">
<GridView x:Name="gridView" Margin="10 0 10 10"
ItemContainerStyle="{StaticResource MyGridViewItemPresenterTemplate}"
SelectionMode="Multiple">
<GridView.ItemTemplate>
<DataTemplate>
<StackPanel Height="100" Width="100" Background="Blue">
<TextBlock x:Name="lblName" Text="{Binding Name}" Foreground="Yellow" />
<TextBlock x:Name="lblAge" Text="{Binding Age}" Foreground="Aqua" />
<TextBlock x:Name="lblIsMale" Text="{Binding IsMale}" Foreground="Gray" />
</StackPanel>
</DataTemplate>
</GridView.ItemTemplate>
</GridView>
</Grid>
</Page>
　　Controls/CollectionControl/ItemsControlDemo/ItemPresenterDemo.xaml.cs



/*
* GridViewItemPresenter, ListViewItemPresenter - 用于呈现 GridView 或 ListView 的 Item（继承自 ContentPresenter, 请参见 /Controls/BaseControl/ContentControlDemo/ContentPresenterDemo.xaml）
*/
using Windows.UI.Xaml.Controls;
using Windows.UI.Xaml.Navigation;
using Windows10.Common;
namespace Windows10.Controls.CollectionControl.ItemsControlDemo
{
public sealed partial class ItemPresenterDemo : Page
{
public ItemPresenterDemo()
{
this.InitializeComponent();
}
protected override void OnNavigatedTo(NavigationEventArgs e)
{
gridView.ItemsSource = TestData.GetEmployees();
}
}
}
　　
OK
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