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ItemsControl 的布局控件实例

时间2024-01-30 11:25:02发布访客分类ASP.NET浏览897
导读:收集整理的这篇文章主要介绍了ItemsControl 的布局控件实例,觉得挺不错的,现在分享给大家,也给大家做个参考。示例1、ITemsStackPanel 的示例Controls/CollectionControl/ItemsContro...
收集整理的这篇文章主要介绍了ItemsControl 的布局控件实例,觉得挺不错的,现在分享给大家,也给大家做个参考。示例

1、ITemsStackPanel 的示例
Controls/CollectionControl/ItemsControlDemo/LayoutControl/ItemsStackPanelDemo.xaml

Pagex:Class="Windows10.Controls.CollectionControl.ItemsControlDemo.LayoutControl.ItemsStackPanelDemo"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.LayoutControl"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">
    StackPanel Margin="5">
    !--itemsStackPanel - 虚拟化布局控件,ListView 的默认布局控件                        Orientation - 子元素的排列方向                            Vertical - 垂直排列,默认值                            Horizontal - 水平排列                        CacheLength - 可见区外的需要缓存的数据的大小(以可见区条数大小的倍数为单位),默认值为 4.0                            比如当可见区可以显示 10 条数据,CacheLength 为 4 时,可见区外的需要缓存的数据的大小则为 4 * 10 = 40,也就是说整个缓存数据的大小为 10 + 4 * 10 = 50                            实际测试发现,可能会有一定的偏差,但是大体是准确的-->
ListView Name="listView1" Margin="5" Width="400" Height="400" HorizontalAlignment="Left" ItemsSource="{
x:Bind MyData.View}
    ">
    ListView.ItemTemplate>
    DataTemplate x:DataType="common:NavigationModel">
    Grid Background="Blue">
TextBlock Text="{
x:Bind Title}
    " />
    /Grid>
    /DataTemplate>
    /ListView.ItemTemplate>
    ListView.ItemsPanel>
    ItemsPanelTemplate>
    ItemsStackPanel Orientation="Vertical" CacheLength="4" />
    /ItemsPanelTemplate>
    /ListView.ItemsPanel>
    /ListView>
    TextBlock Name="lblMsg1" Margin="5" />
    /StackPanel>
    StackPanel Margin="5">
    !--ItemsStackPanel - 虚拟化布局控件,ListView 的默认布局控件                        GroupPadding - 每一个数据组的 padding                        GroupHeaderPlacement - 每一个数据组的 header 的显示位置                            Top - 顶部。默认值                            Left - 左侧                        AreStickyGroupHeadersEnabled - 组 header 是否是固定的,即不随组数据的滚动而滚动。默认值为 true-->
ListView Name="listView2" Margin="5" Width="400" Height="400" HorizontalAlignment="Left" ItemsSource="{
x:Bind MyData.View}
    ">
    ListView.GroupStyle>
    GroupStyle>
    GroupStyle.HeaderTemplate>
    DataTemplate>
TextBlock Text="{
Binding Title}
    " />
    /DataTemplate>
    /GroupStyle.HeaderTemplate>
    /GroupStyle>
    /ListView.GroupStyle>
    ListView.ItemTemplate>
    DataTemplate>
TextBlock Text="{
Binding Title}
    " />
    /DataTemplate>
    /ListView.ItemTemplate>
    ListView.ItemsPanel>
    ItemsPanelTemplate>
ItemsStackPanel GroupPadding="4"                                               GroupHeaderPlacement="Top"                                              AreStickyGroupHeadersEnabled="{
Binding IsChecked, ElementName=chkAreStickyGroupHeadersEnabled}
    " />
    /ItemsPanelTemplate>
    /ListView.ItemsPanel>
    /ListView>
    ComboBox x:Name="cmbGroupHeaderPlacement" Margin="5" PlaceholderText="GroupHeaderPlacement" SelectionChanged="cmbGroupHeaderPlacement_SelectionChanged">
    ComboBoxItem>
    Top/ComboBoxItem>
    ComboBoxItem>
    Left/ComboBoxItem>
    /ComboBox>
    CheckBox Name="chkAreStickyGroupHeadersEnabled" Content="AreStickyGroupHeadersEnabled" IsChecked="True" Margin="5" />
    /StackPanel>
    /StackPanel>
    /Grid>
    /Page>
    

Controls/CollectionControl/ItemsControlDemo/LayoutControl/ItemsStackPanelDemo.xaml.cs

/* * ItemsStackPanel - 虚拟化布局控件,ListView 的默认布局控件(继承自 Panel, 请参见 /Controls/LayoutControl/PanelDemo.xaml) *     FirstCacheIndex - 缓存中的第一项在全部数据中的索引位置 *     FirstVisibleIndex - 屏幕上显示的第一项在全部数据中的索引位置 *     LastCacheIndex - 缓存中的最后一项在全部数据中的索引位置 *     LastVisibleIndex - 屏幕上显示的最后一项在全部数据中的索引位置 *     CacheLength - 可见区外的需要缓存的数据的大小(以可见区条数大小的倍数为单位),默认值为 4.0 *         比如当可见区可以显示 10 条数据,CacheLength 为 4 时,可见区外的需要缓存的数据的大小则为 4 * 10 = 40,也就是说整个缓存数据的大小为 10 + 4 * 10 = 50 *         实际测试发现,可能会有一定的偏差,但是大体是准确的 */using System;
    using System.Collections.Generic;
    using System.Linq;
    using System.Xml.Linq;
    using Windows.UI.Xaml;
    using Windows.UI.Xaml.Controls;
    using Windows.UI.Xaml.Controls.Primitives;
    using Windows.UI.Xaml.Data;
    using Windows10.Common;
namespace Windows10.Controls.CollectionControl.ItemsControlDemo.LayoutControl{
public sealed partial class ItemsStackPanelDemo : Page    {
public CollectionViewSource MyData        {
get{
                    XElement root = XElement.Load("SiteMap.xml");
    VAR items = LoadData(root);
    // 构造数据源CollectionViewSource source = new CollectionViewSource();
                    source.IsSourceGrouped = true;
                    source.Source = items;
                    source.ItemsPath = new PropertyPath("Items");
    return source;
            }
        }
            private ItemsStackPanel _itemsStackPanel1 = null;
    private ItemsStackPanel _itemsStackPanel2 = null;
public ItemsStackPanelDemo()        {
    this.Initializecomponent();
    this.Loaded += ItemsStackPanelDemo_Loaded;
        }
private void ItemsStackPanelDemo_Loaded(object sender, RoutedEventArgs e)        {
                DispatcherTimer dTimer = new DispatcherTimer();
                dTimer.Interval = TimeSpan.Zero;
                dTimer.Tick += DTimer_Tick;
                dTimer.Start();
    // 获取 ListView 中的 ItemsStackPanel 控件_itemsStackPanel1 = listView1.ItemsPanelRoot as ItemsStackPanel;
                _itemsStackPanel2 = listView2.ItemsPanelRoot as ItemsStackPanel;
    // 获取 ListView 中的 ItemsStackPanel 控件// _itemsStackPanel1 = Helper.GetVisualChildItemsStackPanel>
    (listView1);
    // _itemsStackPanel2 = Helper.GetVisualChildItemsStackPanel>
    (listView2);
        }
private void DTimer_Tick(object sender, object e)        {
                lblMsg1.Text = "FirstCacheIndex: " + _itemsStackPanel1.FirstCacheIndex.ToString();
                lblMsg1.Text += environment.NewLine;
                lblMsg1.Text += "FirstVisibleIndex: " + _itemsStackPanel1.FirstVisibleIndex.ToString();
                lblMsg1.Text += Environment.NewLine;
                lblMsg1.Text += "LastCacheIndex: " + _itemsStackPanel1.LastCacheIndex.ToString();
                lblMsg1.Text += Environment.NewLine;
                lblMsg1.Text += "LastVisibleIndex: " + _itemsStackPanel1.LastVisibleIndex.ToString();
                lblMsg1.Text += Environment.NewLine;
                lblMsg1.Text += "CacheLength: " + _itemsStackPanel1.CacheLength.ToString();
        }
private void cmbGroupHeaderPlacement_SelectionChanged(object sender, SelectionChangedEventArgs e)        {
                _itemsStackPanel2.GroupHeaderPlacement = (GroupHeaderPlacement)Enum.Parse(typeof(GroupHeaderPlacement), (e.AddedItems[0] as ComboBoxItem).Content.ToString());
        }
    // 解析 xml 数据private ListNavigationModel>
 LoadData(XElement root)        {
    if (root == null)return null;
var items = From n in root.Elements("node")select new NavigationModel                        {
                            Title = (string)n.Attribute("title"),                            Url = (string)n.Attribute("url"),                            Items = LoadData(n)                        }
    ;
    return items.ToList();
        }
    }
}
    


2、ItemsWrapGrid 的示例
Controls/CollectionControl/ItemsControlDemo/LayoutControl/ItemsWrapGridDemo.xaml

Pagex:Class="Windows10.Controls.CollectionControl.ItemsControlDemo.LayoutControl.ItemsWrapGridDemo"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.LayoutControl"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">
    StackPanel Margin="5">
    !--ItemsWrapGrid - 虚拟化布局控件,GridView 的默认布局控件                        Orientation - 子元素的排列方向                            Vertical - 垂直排列,默认值                            Horizontal - 水平排列                        ItemWidth - 每个 item 的宽                        ItemHeight - 每个 item 的高                        MaximumRowsOrColumns - 最大行数或最大列数(默认值为 -1)                        CacheLength - 可见区外的需要缓存的数据的大小(以可见区条数大小的倍数为单位),默认值为 4.0                            比如当可见区可以显示 10 条数据,CacheLength 为 4 时,可见区外的需要缓存的数据的大小则为 4 * 10 = 40,也就是说整个缓存数据的大小为 10 + 4 * 10 = 50                            实际测试发现,可能会有一定的偏差,但是大体是准确的-->
GridView Name="gridView1" Margin="5" Width="400" Height="400" HorizontalAlignment="Left" ItemsSource="{
x:Bind MyData.View}
    ">
    GridView.ItemTemplate>
    DataTemplate x:DataType="common:NavigationModel">
    Grid Background="Blue">
TextBlock Text="{
x:Bind Title}
    " />
    /Grid>
    /DataTemplate>
    /GridView.ItemTemplate>
    GridView.ItemsPanel>
    ItemsPanelTemplate>
    ItemsWrapGrid Orientation="Horizontal" ItemWidth="120" ItemHeight="50" MaximumRowsOrColumns="3" CacheLength="4" />
    /ItemsPanelTemplate>
    /GridView.ItemsPanel>
    /GridView>
    TextBlock Name="lblMsg1" Margin="5" />
    /StackPanel>
    StackPanel Margin="5">
    !--ItemsWrapGrid - 虚拟化布局控件,GridView 的默认布局控件                        GroupPadding - 每一个数据组的 padding                        GroupHeaderPlacement - 每一个数据组的 header 的显示位置                            Top - 顶部。默认值                            Left - 左侧                        AreStickyGroupHeadersEnabled - 组 header 是否是固定的,即不随组数据的滚动而滚动。默认值为 true-->
ListView Name="gridView2" Margin="5" Width="400" Height="400" HorizontalAlignment="Left" ItemsSource="{
x:Bind MyData.View}
    ">
    ListView.GroupStyle>
    GroupStyle>
    GroupStyle.HeaderTemplate>
    DataTemplate>
TextBlock Text="{
Binding Title}
    " />
    /DataTemplate>
    /GroupStyle.HeaderTemplate>
    /GroupStyle>
    /ListView.GroupStyle>
    ListView.ItemTemplate>
    DataTemplate>
TextBlock Text="{
Binding Title}
    " Width="100" />
    /DataTemplate>
    /ListView.ItemTemplate>
    ListView.ItemsPanel>
    ItemsPanelTemplate>
ItemsWrapGrid Orientation="Horizontal" MaximumRowsOrColumns="3"   GroupPadding="4"   GroupHeaderPlacement="Top"                                            AreStickyGroupHeadersEnabled="{
Binding IsChecked, ElementName=chkAreStickyGroupHeadersEnabled}
    " />
    /ItemsPanelTemplate>
    /ListView.ItemsPanel>
    /ListView>
    ComboBox x:Name="cmbGroupHeaderPlacement" Margin="5" PlaceholderText="GroupHeaderPlacement" SelectionChanged="cmbGroupHeaderPlacement_SelectionChanged">
    ComboBoxItem>
    Top/ComboBoxItem>
    ComboBoxItem>
    Left/ComboBoxItem>
    /ComboBox>
    CheckBox Name="chkAreStickyGroupHeadersEnabled" Content="AreStickyGroupHeadersEnabled" IsChecked="True" Margin="5" />
    /StackPanel>
    /StackPanel>
    /Grid>
    /Page>
    

Controls/CollectionControl/ItemsControlDemo/LayoutControl/ItemsWrapGridDemo.xaml.cs

/* * ItemsWrapGrid - 虚拟化布局控件,GridView 的默认布局控件(继承自 Panel, 请参见 /Controls/LayoutControl/PanelDemo.xaml) *     FirstCacheIndex - 缓存中的第一项在全部数据中的索引位置 *     FirstVisibleIndex - 屏幕上显示的第一项在全部数据中的索引位置 *     LastCacheIndex - 缓存中的最后一项在全部数据中的索引位置 *     LastVisibleIndex - 屏幕上显示的最后一项在全部数据中的索引位置 *     CacheLength - 可见区外的需要缓存的数据的大小(以可见区条数大小的倍数为单位),默认值为 4.0 *         比如当可见区可以显示 10 条数据,CacheLength 为 4 时,可见区外的需要缓存的数据的大小则为 4 * 10 = 40,也就是说整个缓存数据的大小为 10 + 4 * 10 = 50 *         实际测试发现,可能会有一定的偏差,但是大体是准确的 */using System;
    using System.Collections.Generic;
    using System.Linq;
    using System.Xml.Linq;
    using Windows.UI.Xaml;
    using Windows.UI.Xaml.Controls;
    using Windows.UI.Xaml.Controls.Primitives;
    using Windows.UI.Xaml.Data;
    using Windows10.Common;
namespace Windows10.Controls.CollectionControl.ItemsControlDemo.LayoutControl{
public sealed partial class ItemsWrapGridDemo : Page    {
public CollectionViewSource MyData        {
get{
                    XElement root = XElement.Load("SiteMap.xml");
    var items = LoadData(root);
    // 构造数据源CollectionViewSource source = new CollectionViewSource();
                    source.IsSourceGrouped = true;
                    source.Source = items;
                    source.ItemsPath = new PropertyPath("Items");
    return source;
            }
        }
    private ItemsWrapGrid _itemsWrapGrid1 = null;
    private ItemsWrapGrid _itemsWrapGrid2 = null;
public ItemsWrapGridDemo()        {
    this.InitializeComponent();
    this.Loaded += ItemsWrapGridDemo_Loaded;
        }
private void ItemsWrapGridDemo_Loaded(object sender, RoutedEventArgs e)        {
                DispatcherTimer dTimer = new DispatcherTimer();
                dTimer.Interval = TimeSpan.Zero;
                dTimer.Tick += DTimer_Tick;
                dTimer.Start();
    // 获取 GridView 中的 ItemsWrapGrid 控件_itemsWrapGrid1 = gridView1.ItemsPanelRoot as ItemsWrapGrid;
                _itemsWrapGrid2 = gridView2.ItemsPanelRoot as ItemsWrapGrid;
    // 获取 GridView 中的 ItemsWrapGrid 控件// _itemsWrapGrid1 = Helper.GetVisualChildItemsWrapGrid>
    (gridView1);
    // _itemsWrapGrid2 = Helper.GetVisualChildItemsWrapGrid>
    (gridView2);
        }
private void DTimer_Tick(object sender, object e)        {
                lblMsg1.Text = "FirstCacheIndex: " + _itemsWrapGrid1.FirstCacheIndex.ToString();
                lblMsg1.Text += Environment.NewLine;
                lblMsg1.Text += "FirstVisibleIndex: " + _itemsWrapGrid1.FirstVisibleIndex.ToString();
                lblMsg1.Text += Environment.NewLine;
                lblMsg1.Text += "LastCacheIndex: " + _itemsWrapGrid1.LastCacheIndex.ToString();
                lblMsg1.Text += Environment.NewLine;
                lblMsg1.Text += "LastVisibleIndex: " + _itemsWrapGrid1.LastVisibleIndex.ToString();
                lblMsg1.Text += Environment.NewLine;
                lblMsg1.Text += "CacheLength: " + _itemsWrapGrid1.CacheLength.ToString();
        }
private void cmbGroupHeaderPlacement_SelectionChanged(object sender, SelectionChangedEventArgs e)        {
                _itemsWrapGrid2.GroupHeaderPlacement = (GroupHeaderPlacement)Enum.Parse(typeof(GroupHeaderPlacement), (e.AddedItems[0] as ComboBoxItem).Content.ToString());
        }
    // 解析 xml 数据private ListNavigationModel>
 LoadData(XElement root)        {
    if (root == null)return null;
var items = from n in root.Elements("node")select new NavigationModel                        {
                            Title = (string)n.Attribute("title"),                            Url = (string)n.Attribute("url"),                            Items = LoadData(n)                        }
    ;
    return items.ToList();
        }
    }
}
    



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