Windows 10中控件集合类的示例分析

这篇文章将为大家详细讲解有关Windows 10中控件集合类的示例分析，小编觉得挺实用的，因此分享给大家做个参考，希望大家阅读完这篇文章后可以有所收获。

示例

1、自定义 ItemsControl（自定义 GirdView 使其每个 item 占用不同大小的空间）
Controls/CollectionControl/ItemsControlDemo/MyItemsControlDemo.xaml

Controls/CollectionControl/ItemsControlDemo/MyItemsControlDemo.xaml.cs

/* * ItemsControl - 集合控件 *     protected virtual void PrepareContainerForItemOverride(DependencyObject element, object item); - 为 item 准备 container 时 *         element - item 的 container *         item - item *          *  * 本例用于演示如何使 GirdView 中的每个 item 占用不同大小的空间 * 1、布局控件要使用 VariableSizedWrapGrid（利用其 RowSpan 和 ColumnSpan 来实现 item 占用不同大小的空间），需要注意的是其并非是虚拟化布局控件 * 2、自定义 GridView，并重写 ItemsControl 的 protected override void PrepareContainerForItemOverride(DependencyObject element, object item) 方法 *    然后设置每个 item 的 VariableSizedWrapGrid.RowSpan 和 VariableSizedWrapGrid.ColumnSpan */using System;using System.Collections.Generic;using System.Linq;using Windows.UI;using Windows.UI.Xaml;using Windows.UI.Xaml.Controls;using Windows.UI.Xaml.Media;using System.Reflection;namespace Windows10.Controls.CollectionControl.ItemsControlDemo{public sealed partial class MyItemsControlDemo : Page    {public MyItemsControlDemo()        {this.InitializeComponent();               BindData();        }private void BindData()        {            Random random = new Random();// 获取 Windows.UI.Colors 的全部数据Type type = typeof(Colors);            List colors = type.GetRuntimeProperties() // GetRuntimeProperties() 在 System.Reflection 命名空间下.Select(c => new ColorModel                {                    ColorName = c.Name,                    ColorValue = new SolidColorBrush((Color)c.GetValue(null)),                    ColSpan = random.Next(1, 3), // 此对象所占网格的列合并数RowSpan = random.Next(1, 3) // 此对象所占网格的行合并数                })                .ToList();// 绑定数据gridView.ItemsSource = colors;        }    }/// 
/// 用于数据绑定的对象/// 
public class ColorModel    {public string ColorName { get; set; }public SolidColorBrush ColorValue { get; set; }// 此对象所占的网格的列合并数public int ColSpan { get; set; }// 此对象所占的网格的行合并数public int RowSpan { get; set; }    }/// 
/// 自定义 GridView，重写 ItemsControl 的 protected override void PrepareContainerForItemOverride(DependencyObject element, object item) 方法/// 用于指定 GridView 的每个 item 所占网格的列合并数和行合并数/// 
public class MyGridView : GridView    {protected override void PrepareContainerForItemOverride(DependencyObject element, object item)        {try{// 设置每个 item 的 VariableSizedWrapGrid.RowSpan 和 VariableSizedWrapGrid.ColumnSpan, 从而实现每个 item 占用不同大小的空间// 仅为演示用，由于这里的 ColSpan 和 RowSpan 都是随机计算的，所以可能会出现空白空间dynamic dynamicItem = item;                element.SetValue(VariableSizedWrapGrid.ColumnSpanProperty, dynamicItem.ColSpan);                element.SetValue(VariableSizedWrapGrid.RowSpanProperty, dynamicItem.RowSpan);            }catch (Exception ex)            {var ignore = ex;// 当有异常情况发生时（比如：item 没有 ColSpan 属性或 RowSpan 属性）element.SetValue(VariableSizedWrapGrid.ColumnSpanProperty, 1);                element.SetValue(VariableSizedWrapGrid.RowSpanProperty, 1);            }finally{base.PrepareContainerForItemOverride(element, item);            }        }    }}

2、自定义 ContentPresenter 实现类似 GridViewItemPresenter 和 ListViewItemPresenter 的效果
Controls/CollectionControl/ItemsControlDemo/MyItemPresenter.cs

/* * 自定义 ContentPresenter 实现类似 GridViewItemPresenter 和 ListViewItemPresenter 的效果 */using System;using Windows.Foundation;using Windows.UI;using Windows.UI.Xaml;using Windows.UI.Xaml.Controls;using Windows.UI.Xaml.Media;using Windows.UI.Xaml.Media.Animation;using Windows.UI.Xaml.Shapes;namespace Windows10.Controls.CollectionControl.ItemsControlDemo{class MyItemPresenter : ContentPresenter    {        Panel _container = null; // item 的容器（即在 DataTemplate 中定义的根元素，在示例 MyItemPresenterDemo.xaml 中用的是 Grid）Rectangle _pointerOverBorder = null; // 鼠标经过 item 时覆盖在 item 上的 rectangleRectangle _focusVisual = null; // 选中 item 时覆盖在 item 上的 rectangleStoryboard _pointerDownStoryboard = null; // 鼠标按下时的动画Storyboard _pointerUpStoryboard = null; // 鼠标抬起时的动画public MyItemPresenter()            : base()        {base.Margin = new Thickness(10);        }// override OnApplyTemplate() - 应用控件模板时调用protected override void OnApplyTemplate()        {base.OnApplyTemplate();            _container = (Panel)VisualTreeHelper.GetChild(this, 0);        }// override GoToElementStateCore() - VisualState 转换时调用（此方法仅在自定义 ContentPresenter 并将其应用于 GridView 或 ListView 的 ItemContainerStyle 时才会被调用）//     stateName - VisualState 的名字//     useTransitions - 是否使用 VisualTransition 过渡效果protected override bool GoToElementStateCore(string stateName, bool useTransitions)        {base.GoToElementStateCore(stateName, useTransitions);switch (stateName)            {// 正常状态case "Normal":                    HidePointerOverVisuals();                    HideFocusVisuals();if (useTransitions)                    {                        StopPointerDownAnimation();                    }break;// 选中状态case "Selected":case "PointerFocused":                    ShowFocusVisuals();if (useTransitions)                    {                        StopPointerDownAnimation();                    }break;// 取消选中状态case "Unfocused":                    HideFocusVisuals();break;// 鼠标经过状态case "PointerOver":                    ShowPointerOverVisuals();if (useTransitions)                    {                        StopPointerDownAnimation();                    }break;// 鼠标点击状态case "Pressed":case "PressedSelected":if (useTransitions)                    {                        StartPointerDownAnimation();                    }break;default: break;            }return true;        }private void StartPointerDownAnimation()        {if (_pointerDownStoryboard == null)                CreatePointerDownStoryboard();            _pointerDownStoryboard.Begin();        }private void StopPointerDownAnimation()        {if (_pointerUpStoryboard == null)                CreatePointerUpStoryboard();            _pointerUpStoryboard.Begin();        }private void ShowFocusVisuals()        {if (!FocusElementsAreCreated())                CreateFocusElements();            _focusVisual.Opacity = 1;        }private void HideFocusVisuals()        {if (FocusElementsAreCreated())                _focusVisual.Opacity = 0;        }private void ShowPointerOverVisuals()        {if (!PointerOverElementsAreCreated())                CreatePointerOverElements();            _pointerOverBorder.Opacity = 1;        }private void HidePointerOverVisuals()        {if (PointerOverElementsAreCreated())                _pointerOverBorder.Opacity = 0;        }private void CreatePointerDownStoryboard()        {/* * 用这种方式为 item 实现鼠标按下的效果会报错（Attempted to read or write protected memory. This is often an indication that other memory is corrupt.），不知道为什么             * PointerDownThemeAnimation pointerDownAnimation = new PointerDownThemeAnimation();             * Storyboard.SetTarget(pointerDownAnimation, _container);             * Storyboard pointerDownStoryboard = new Storyboard();             * pointerDownStoryboard.Children.Add(pointerDownAnimation);             */DoubleAnimation da1 = new DoubleAnimation()            {                To = 0.9,                Duration = TimeSpan.FromMilliseconds(100)            };            DoubleAnimation da2 = new DoubleAnimation()            {                To = 0.9,                Duration = TimeSpan.FromMilliseconds(100)            };            Storyboard.SetTarget(da1, _container);            Storyboard.SetTargetProperty(da1, "(UIElement.RenderTransform).(TransformGroup.Children)[0].(ScaleTransform.ScaleX)");            Storyboard.SetTarget(da2, _container);            Storyboard.SetTargetProperty(da2, "(UIElement.RenderTransform).(TransformGroup.Children)[0].(ScaleTransform.ScaleY)");if (!(_container.RenderTransform is TransformGroup))            {                TransformGroup Group = new TransformGroup();                Group.Children.Add(new ScaleTransform());                _container.RenderTransform = Group;                _container.RenderTransformOrigin = new Point(0.5, 0.5);            }            _pointerDownStoryboard = new Storyboard();            _pointerDownStoryboard.Children.Add(da1);            _pointerDownStoryboard.Children.Add(da2);            _pointerDownStoryboard.Begin();        }private void CreatePointerUpStoryboard()        {            DoubleAnimation da1 = new DoubleAnimation()            {                To = 1,                Duration = TimeSpan.FromMilliseconds(100)            };            DoubleAnimation da2 = new DoubleAnimation()            {                To = 1,                Duration = TimeSpan.FromMilliseconds(100)            };            Storyboard.SetTarget(da1, _container);            Storyboard.SetTargetProperty(da1, "(UIElement.RenderTransform).(TransformGroup.Children)[0].(ScaleTransform.ScaleX)");            Storyboard.SetTarget(da2, _container);            Storyboard.SetTargetProperty(da2, "(UIElement.RenderTransform).(TransformGroup.Children)[0].(ScaleTransform.ScaleY)");if (!(_container.RenderTransform is TransformGroup))            {                TransformGroup Group = new TransformGroup();                Group.Children.Add(new ScaleTransform());                _container.RenderTransform = Group;                _container.RenderTransformOrigin = new Point(0.5, 0.5);            }            _pointerUpStoryboard = new Storyboard();            _pointerUpStoryboard.Children.Add(da1);            _pointerUpStoryboard.Children.Add(da2);            _pointerUpStoryboard.Begin();        }private void CreatePointerOverElements()        {            _pointerOverBorder = new Rectangle();            _pointerOverBorder.IsHitTestVisible = false;            _pointerOverBorder.Opacity = 0;// 这里把颜色写死了，仅为演示用，实际写的时候要摘出来写成依赖属性_pointerOverBorder.Fill = new SolidColorBrush(Color.FromArgb(0x50, 0x50, 0x50, 0x50));            _container.Children.Insert(_container.Children.Count, _pointerOverBorder);        }private void CreateFocusElements()        {            _focusVisual = new Rectangle();            _focusVisual.IsHitTestVisible = false;            _focusVisual.Height = 10;            _focusVisual.VerticalAlignment = VerticalAlignment.Bottom;// 这里把颜色写死了，仅为演示用，实际写的时候要摘出来写成依赖属性_focusVisual.Fill = new SolidColorBrush(Color.FromArgb(0xff, 0xff, 0x0, 0x0));            _container.Children.Insert(0, _focusVisual);        }private bool FocusElementsAreCreated()        {return _focusVisual != null;        }private bool PointerOverElementsAreCreated()        {return _pointerOverBorder != null;        }    }}

Controls/CollectionControl/ItemsControlDemo/MyItemPresenterDemo.xaml

Controls/CollectionControl/ItemsControlDemo/MyItemPresenterDemo.xaml.cs

/* * 本例用于演示如何自定义 ContentPresenter 实现类似 GridViewItemPresenter 和 ListViewItemPresenter 的效果 */using Windows.UI.Xaml.Controls;using Windows.UI.Xaml.Navigation;using Windows10.Common;namespace Windows10.Controls.CollectionControl.ItemsControlDemo{public sealed partial class MyItemPresenterDemo : Page    {public MyItemPresenterDemo()        {this.InitializeComponent();        }protected override void OnNavigatedTo(NavigationEventArgs e)        {            gridView.ItemsSource = TestData.GetEmployees();        }    }}

关于"Windows 10中控件集合类的示例分析"这篇文章就分享到这里了，希望以上内容可以对大家有一定的帮助，使各位可以学到更多知识，如果觉得文章不错，请把它分享出去让更多的人看到。