WPF 自定义ItemsControl三层嵌套无法生成第三层控件

2023-11-07 10:19:54 1.4k 阅读 AI 写同款 · GEO 优化AI 选题数据监测一键分发 ›

Dear200892 墨衍会员 · AI 创作全网分发关注 + 加入社区

WPF ItemsControl滚动条实战：从基础封装到复杂嵌套场景本文深入探讨了WPF中ItemsControl滚动条的实战应用，从解决滚动条不显示的基础问题入手，详细介绍了通过ScrollViewer封装和布局约束实现滚动。进一步讲解了如何封装可复用的ScrollableItemsControl自定义控件，并针对复杂嵌套场景，分析了UI虚拟化优化和解决内部控件滚轮事件传递失灵的高级方案，帮助开发者构建高性能、交互流畅的WPF列表界面。阅读详情

我在尝试制作一个数独的小游戏，我自定义了三个控件，分别是：SudokuPanel，SudokuGroup和SudokuItem。

SudokuPanel：作为数独表格的主面板区域，继承ItemsControl，限制了Item项为SudokuGroup。

SudokuGroup：数独9*9的区域，继承ItemsControl，限制了Item项为SudokuItem。

SudokuItem：数独的单元格，继承Button。

在ViewModel定义了属性ObservableCollection<Unit> Units，Unit对象含有ObservableCollection<Cell> Children属性，两个类均实现了INotifyPropertyChanged接口。

现在运行程序，只会显示到SudokuGroup层级，不明白为什么会这样？该如何修改？

<ctrl:SudokuPanel ItemsSource="{Binding Units}" Margin="5">
            <ctrl:SudokuPanel.ItemTemplate>
                <DataTemplate>
                    <ctrl:SudokuGroup ItemsSource="{Binding Children}">
                        <ctrl:SudokuGroup.ItemTemplate>
                            <DataTemplate>
                                <ctrl:SudokuItem Content="2"/>
                            </DataTemplate>
                        </ctrl:SudokuGroup.ItemTemplate>
                    </ctrl:SudokuGroup>
                </DataTemplate>
            </ctrl:SudokuPanel.ItemTemplate>
        </ctrl:SudokuPanel>

我给SudokuGroup添加了一个触发器，整个SudokuGroup背景色都变成了红色，这让我更加觉得是没有生成SudokuItem，而不是SudokuItem“藏”起来了。

<Trigger Property="HasItems" Value="False">
                            <Setter Property="Background" Value="Red"/>
                        </Trigger>

...全文

WPF ItemsControl滚动条实战：从基础封装到复杂场景的ScrollViewer应用本文深入探讨了WPF中ItemsControl滚动条的实现与优化。针对其默认无滚动功能的设计，详细讲解了通过嵌入ScrollViewer或外部包裹两种基础方法实现滚动，并解决了复杂布局下虚拟化、嵌套控件滚轮事件冲突等难题。文章还提供了性能优化建议和构建可复用滚动列表控件的完整实战方案，帮助开发者高效处理WPF中的列表滚动需求。阅读详情

Dear200892

WPF/Silverlight 8,757 成员 12,031 内容

+ 关注 + 加入社区

切换为时间正序

Dear200892 2023-11-07

打赏
举报

其他代码：

/// <summary>
    /// 数独单元格样式选择
    /// </summary>
    public class SudokuItemStyleSelector : StyleSelector
    {
        /// <summary>
        /// 当在派生类中重写返回 <see cref="Style"/> 基于自定义逻辑。
        /// </summary>
        /// <param name="item">使用的内容</param>
        /// <param name="container">将向其应用样式的元素</param>
        /// <returns></returns>
        public override Style SelectStyle(object item, DependencyObject container)
        {
            ItemsControl group = ItemsControl.ItemsControlFromItemContainer(container);
            int index = group.ItemContainerGenerator.IndexFromContainer(container);
            return (Style)Application.Current.TryFindResource($"SudokuItem.{index}");
        }
    }

/// <summary>
    /// 数独九宫格样式选择
    /// </summary>
    public class SudokuGroupStyleSelector : StyleSelector
    {
        /// <summary>
        /// 当在派生类中重写返回 <see cref="Style"/> 基于自定义逻辑。
        /// </summary>
        /// <param name="item">使用的内容</param>
        /// <param name="container">将向其应用样式的元素</param>
        /// <returns></returns>
        public override Style SelectStyle(object item, DependencyObject container)
        {
            ItemsControl panel = ItemsControl.ItemsControlFromItemContainer(container);
            int index = panel.ItemContainerGenerator.IndexFromContainer(container);
            return (Style)Application.Current.TryFindResource($"SudokuGroup.{index}");
        }
    }

/// <summary>
    /// 按照参数将Thickness放大指定倍数
    /// </summary>
    public class ThicknessSplitConverter : IValueConverter
    {
        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
        {
            if (value is Thickness thickness)
            {
                if (parameter is string str)
                {
                    string[] array = str.Split(',');
                    if (array.Length == 1)
                        array = new string[4] { array[0], array[0], array[0], array[0] };
                    else if (array.Length != 4)
                        return thickness;

                    Thickness result = new Thickness(thickness.Left, thickness.Top, thickness.Right, thickness.Bottom);

                    if (double.TryParse(array[0], out double leftTimes))
                        result.Left = leftTimes * thickness.Left;

                    if (double.TryParse(array[1], out double topTimes))
                        result.Top = topTimes * thickness.Top;

                    if (double.TryParse(array[2], out double rightTimes))
                        result.Right = rightTimes * thickness.Right;

                    if (double.TryParse(array[3], out double bottomTimes))
                        result.Bottom = bottomTimes * thickness.Bottom;

                    return result;
                }
            }
            return value;
        }

        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
        {
            throw new NotSupportedException();
        }
    }

Dear200892 2023-11-07

打赏
举报

这是SudokuItem相关代码：

/// <summary>
    /// 表示中选择的项目 <see cref="SudokuGroup"/>
    /// </summary>
    public class SudokuItem : Button
    {
        /// <summary>
        /// 表示中选择的项目 <see cref="SudokuGroup"/>
        /// </summary>
        static SudokuItem()
        {
            DefaultStyleKeyProperty.OverrideMetadata(typeof(SudokuItem), new FrameworkPropertyMetadata(typeof(SudokuItem)));
        }

        #region BorderThick

        /// <summary>
        /// 边框厚度
        /// </summary>
        /// <remarks>中间变量,使用<see cref="Border.BorderThickness"/></remarks>
        public static readonly DependencyProperty BorderThickProperty =
            DependencyProperty.Register("BorderThick", typeof(Thickness), typeof(SudokuItem), new PropertyMetadata(new Thickness()));

        /// <summary>
        /// 边框厚度
        /// </summary>
        /// <remarks>中间变量,使用<see cref="Border.BorderThickness"/></remarks>
        public Thickness BorderThick
        {
            get { return (Thickness)GetValue(BorderThickProperty); }
            set { SetValue(BorderThickProperty, value); }
        }

        #endregion
    }


<convert:ThicknessSplitConverter x:Key="ThicknessSplitConverter"/>

    <!--数独单元格 样式-->
    <Style x:Key="SudokuItem.Base" TargetType="local:SudokuItem">
        <Setter Property="Padding" Value="5"/>
        <Setter Property="BorderBrush" Value="{DynamicResource Sudoku_Item_BorderBrush}"/>
        <Setter Property="BorderThick" Value="{DynamicResource Sudoku_Item_BorderThickness}"/>
        <Setter Property="BorderThickness" Value="1"/>
        <Setter Property="Background" Value="Transparent"/>
        <Setter Property="TextBlock.Foreground" Value="{DynamicResource Sudoku_Item_Prefedined_Foreground}"/>
        <Setter Property="TextBlock.FontSize" Value="{DynamicResource Sudoku_Item_Value_FontSize}"/>
        <Setter Property="SnapsToDevicePixels" Value="True"/>
        <Setter Property="Template">
            <Setter.Value>
                <ControlTemplate TargetType="local:SudokuItem">
                    <Grid>
                        <Border x:Name="border" Padding="{TemplateBinding Padding}" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" Background="{TemplateBinding Background}" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}">
                            <Rectangle x:Name="rectangle" Fill="Transparent" RadiusX="{DynamicResource Sudoku_Double_Radius}" RadiusY="{DynamicResource Sudoku_Double_Radius}" Visibility="Collapsed"/>                            
                        </Border>
                        <ContentPresenter Content="{TemplateBinding Content}" TextBlock.Foreground="{TemplateBinding TextBlock.Foreground}" TextBlock.FontSize="{TemplateBinding TextBlock.FontSize}" TextBlock.FontWeight="Black" HorizontalAlignment="Center" VerticalAlignment="Center" IsHitTestVisible="False"/>
                    </Grid>
                    <ControlTemplate.Triggers>
                        <Trigger Property="IsMouseOver" Value="True">
                            <Setter TargetName="border" Property="Margin" Value="{Binding RelativeSource={RelativeSource Mode=FindAncestor,AncestorType=local:SudokuItem},Path=BorderThick,Converter={StaticResource ThicknessSplitConverter},ConverterParameter='-2'}"/>
                            <Setter TargetName="border" Property="Border.CornerRadius" Value="{DynamicResource Sudoku_Radius}"/>
                            <Setter TargetName="border" Property="Border.BorderBrush" Value="#1a80b3"/>
                            <Setter TargetName="border" Property="Border.BorderThickness" Value="{DynamicResource Sudoku_Parent_BorderThickness}"/>
                            <Setter TargetName="rectangle" Property="Fill" Value="#6bab21"/>
                        </Trigger>
                        <Trigger Property="IsPressed" Value="True">
                            <Setter Property="TextBlock.Foreground" Value="{DynamicResource Sudoku_Item_Value_Foreground}"/>
                            <Setter TargetName="rectangle" Property="Visibility" Value="Visible"/>
                            <Setter TargetName="border" Property="Border.BorderBrush" Value="{DynamicResource Sudoku_Parent_BorderBrush}"/>
                        </Trigger>
                    </ControlTemplate.Triggers>
                </ControlTemplate>
            </Setter.Value>
        </Setter>
    </Style>

    <!--<Style BasedOn="{StaticResource SudokuItem.Base}" TargetType="local:SudokuItem"/>-->

    <!--数独单元格 左上角 样式-->
    <Style x:Key="SudokuItem.0" TargetType="local:SudokuItem" BasedOn="{StaticResource SudokuItem.Base}">
        <Setter Property="BorderThickness" Value="{Binding RelativeSource={RelativeSource Self},Path=BorderThick,Converter={StaticResource ThicknessSplitConverter},ConverterParameter='0,0,1,1'}"/>
    </Style>
    <!--数独单元格 上部 样式-->
    <Style x:Key="SudokuItem.1" TargetType="local:SudokuItem" BasedOn="{StaticResource SudokuItem.Base}">
        <Setter Property="BorderThickness" Value="{Binding RelativeSource={RelativeSource Self},Path=BorderThick,Converter={StaticResource ThicknessSplitConverter},ConverterParameter='1,0,1,1'}"/>
    </Style>
    <!--数独单元格 右上角 样式-->
    <Style x:Key="SudokuItem.2" TargetType="local:SudokuItem" BasedOn="{StaticResource SudokuItem.Base}">
        <Setter Property="BorderThickness" Value="{Binding RelativeSource={RelativeSource Self},Path=BorderThick,Converter={StaticResource ThicknessSplitConverter},ConverterParameter='1,0,0,1'}"/>
    </Style>

    <!--数独单元格 左中角 样式-->
    <Style x:Key="SudokuItem.3" TargetType="local:SudokuItem" BasedOn="{StaticResource SudokuItem.Base}">
        <Setter Property="BorderThickness" Value="{Binding RelativeSource={RelativeSource Self},Path=BorderThick,Converter={StaticResource ThicknessSplitConverter},ConverterParameter='0,1,1,1'}"/>
    </Style>
    <!--数独单元格 中部 样式-->
    <Style x:Key="SudokuItem.4" TargetType="local:SudokuItem" BasedOn="{StaticResource SudokuItem.Base}">
        <Setter Property="BorderThickness" Value="{Binding RelativeSource={RelativeSource Self},Path=BorderThick,Converter={StaticResource ThicknessSplitConverter},ConverterParameter='1'}"/>
    </Style>
    <!--数独单元格 右中角 样式-->
    <Style x:Key="SudokuItem.5" TargetType="local:SudokuItem" BasedOn="{StaticResource SudokuItem.Base}">
        <Setter Property="BorderThickness" Value="{Binding RelativeSource={RelativeSource Self},Path=BorderThick,Converter={StaticResource ThicknessSplitConverter},ConverterParameter='1,1,0,1'}"/>
    </Style>

    <!--数独单元格 左下角 样式-->
    <Style x:Key="SudokuItem.6" TargetType="local:SudokuItem" BasedOn="{StaticResource SudokuItem.Base}">
        <Setter Property="BorderThickness" Value="{Binding RelativeSource={RelativeSource Self},Path=BorderThick,Converter={StaticResource ThicknessSplitConverter},ConverterParameter='0,1,1,0'}"/>
    </Style>
    <!--数独单元格 下部 样式-->
    <Style x:Key="SudokuItem.7" TargetType="local:SudokuItem" BasedOn="{StaticResource SudokuItem.Base}">
        <Setter Property="BorderThickness" Value="{Binding RelativeSource={RelativeSource Self},Path=BorderThick,Converter={StaticResource ThicknessSplitConverter},ConverterParameter='1,1,1,0'}"/>
    </Style>
    <!--数独单元格 右下角 样式-->
    <Style x:Key="SudokuItem.8" TargetType="local:SudokuItem" BasedOn="{StaticResource SudokuItem.Base}">
        <Setter Property="BorderThickness" Value="{Binding RelativeSource={RelativeSource Self},Path=BorderThick,Converter={StaticResource ThicknessSplitConverter},ConverterParameter='1,1,0,0'}"/>
    </Style>

Dear200892 2023-11-07

打赏
举报

这是SudokuGroup相关代码：

/// <summary>
    /// 数独九宫格
    /// </summary>
    public class SudokuGroup : ItemsControl
    {
        /// <summary>
        /// 数独九宫格
        /// </summary>
        static SudokuGroup()
        {
            DefaultStyleKeyProperty.OverrideMetadata(typeof(SudokuGroup), new FrameworkPropertyMetadata(typeof(SudokuGroup)));
        }

        #region BorderThick

        /// <summary>
        /// 边框厚度
        /// </summary>
        /// <remarks>中间变量,使用<see cref="Border.BorderThickness"/></remarks>
        public static readonly DependencyProperty BorderThickProperty =
            DependencyProperty.Register("BorderThick", typeof(Thickness), typeof(SudokuGroup), new PropertyMetadata(new Thickness()));

        /// <summary>
        /// 边框厚度
        /// </summary>
        /// <remarks>中间变量,使用<see cref="Border.BorderThickness"/></remarks>
        public Thickness BorderThick
        {
            get { return (Thickness)GetValue(BorderThickProperty); }
            set { SetValue(BorderThickProperty, value); }
        }

        #endregion

        protected override void OnItemsSourceChanged(IEnumerable oldValue, IEnumerable newValue)
        {
            base.OnItemsSourceChanged(oldValue, newValue);
        }

        /// <summary>
        /// 确定指定的项 （或是否可以作为） 自己 ItemContainer。
        /// </summary>
        /// <param name="item">指定的项</param>
        /// <returns> true 如果该项是其自己 ItemContainer; 否则为 false</returns>
        protected override bool IsItemItsOwnContainerOverride(object item)
        {
            return item is SudokuItem;
        }

        /// <summary>
        /// 创建或标识用于显示指定的项的元素
        /// </summary>
        /// <returns></returns>
        protected override DependencyObject GetContainerForItemOverride()
        {
            return new SudokuItem();
        }
    }

<common:SudokuItemStyleSelector x:Key="itemStyleSelector"/>
    <convert:ThicknessSplitConverter x:Key="ThicknessSplitConverter"/>

    <!--数独九宫格 样式-->
    <Style x:Key="SudokuGroup.Base" TargetType="local:SudokuGroup">
        <Setter Property="BorderBrush" Value="{DynamicResource Sudoku_Parent_BorderBrush}"/>
        <Setter Property="BorderThick" Value="{DynamicResource Sudoku_Parent_BorderThickness}"/>
        <Setter Property="BorderThickness" Value="0"/>
        <Setter Property="Background" Value="Transparent"/>
        <Setter Property="SnapsToDevicePixels" Value="True"/>
        <Setter Property="ItemContainerStyleSelector" Value="{DynamicResource itemStyleSelector}"/>
        <Setter Property="ItemsPanel">
            <Setter.Value>
                <ItemsPanelTemplate>
                    <UniformGrid Rows="3" Columns="3"/>
                </ItemsPanelTemplate>
            </Setter.Value>
        </Setter>
        <Setter Property="Template">
            <Setter.Value>
                <ControlTemplate TargetType="local:SudokuGroup">
                    <Border BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" Background="{TemplateBinding Background}" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}">
                        <ItemsPresenter/>
                    </Border>
                    <ControlTemplate.Triggers>
                        <Trigger Property="HasItems" Value="False">
                            <Setter Property="Background" Value="Red"/>
                        </Trigger>
                    </ControlTemplate.Triggers>
                </ControlTemplate>
            </Setter.Value>
        </Setter>
    </Style>

    <!--数独九宫格 左上角 样式-->
    <Style x:Key="SudokuGroup.0" TargetType="local:SudokuGroup" BasedOn="{StaticResource SudokuGroup.Base}">
        <Setter Property="BorderThickness" Value="{Binding RelativeSource={RelativeSource Self},Path=BorderThick,Converter={StaticResource ThicknessSplitConverter},ConverterParameter='0,0,0,1'}"/>
    </Style>
    <!--数独九宫格 上部 样式-->
    <Style x:Key="SudokuGroup.1" TargetType="local:SudokuGroup" BasedOn="{StaticResource SudokuGroup.Base}">
        <Setter Property="BorderThickness" Value="{Binding RelativeSource={RelativeSource Self},Path=BorderThick,Converter={StaticResource ThicknessSplitConverter},ConverterParameter='1,0,1,1'}"/>
    </Style>
    <!--数独九宫格 右上角 样式-->
    <Style x:Key="SudokuGroup.2" TargetType="local:SudokuGroup" BasedOn="{StaticResource SudokuGroup.Base}">
        <Setter Property="BorderThickness" Value="{Binding RelativeSource={RelativeSource Self},Path=BorderThick,Converter={StaticResource ThicknessSplitConverter},ConverterParameter='0,0,0,1'}"/>
    </Style>

    <!--数独九宫格 左中角 样式-->
    <Style x:Key="SudokuGroup.3" TargetType="local:SudokuGroup" BasedOn="{StaticResource SudokuGroup.Base}">
        <Setter Property="BorderThickness" Value="{Binding RelativeSource={RelativeSource Self},Path=BorderThick,Converter={StaticResource ThicknessSplitConverter},ConverterParameter='0,0,0,1'}"/>
    </Style>
    <!--数独九宫格 中部 样式-->
    <Style x:Key="SudokuGroup.4" TargetType="local:SudokuGroup" BasedOn="{StaticResource SudokuGroup.Base}">
        <Setter Property="BorderThickness" Value="{Binding RelativeSource={RelativeSource Self},Path=BorderThick,Converter={StaticResource ThicknessSplitConverter},ConverterParameter='1,0,1,1'}"/>
    </Style>
    <!--数独九宫格 右中角 样式-->
    <Style x:Key="SudokuGroup.5" TargetType="local:SudokuGroup" BasedOn="{StaticResource SudokuGroup.Base}">
        <Setter Property="BorderThickness" Value="{Binding RelativeSource={RelativeSource Self},Path=BorderThick,Converter={StaticResource ThicknessSplitConverter},ConverterParameter='0,0,0,1'}"/>
    </Style>

    <!--数独九宫格 左下角 样式-->
    <Style x:Key="SudokuGroup.6" TargetType="local:SudokuGroup" BasedOn="{StaticResource SudokuGroup.Base}">
        
    </Style>
    <!--数独九宫格 下部 样式-->
    <Style x:Key="SudokuGroup.7" TargetType="local:SudokuGroup" BasedOn="{StaticResource SudokuGroup.Base}">
        <Setter Property="BorderThickness" Value="{Binding RelativeSource={RelativeSource Self},Path=BorderThick,Converter={StaticResource ThicknessSplitConverter},ConverterParameter='1,0,1,0'}"/>
    </Style>
    <!--数独九宫格 右下角 样式-->
    <Style x:Key="SudokuGroup.8" TargetType="local:SudokuGroup" BasedOn="{StaticResource SudokuGroup.Base}">

    </Style>

Dear200892 2023-11-07

打赏
举报

这是SudokuPanel相关代码：

 /// <summary>
    /// 数独面板
    /// </summary>
    public class SudokuPanel : ItemsControl
    {
        /// <summary>
        /// 数独面板
        /// </summary>
        static SudokuPanel()
        {
            DefaultStyleKeyProperty.OverrideMetadata(typeof(SudokuPanel), new FrameworkPropertyMetadata(typeof(SudokuPanel)));
        }

        /// <summary>
        /// 确定指定的项 （或是否可以作为） 自己 ItemContainer。
        /// </summary>
        /// <param name="item">指定的项</param>
        /// <returns> true 如果该项是其自己 ItemContainer; 否则为 false</returns>
        protected override bool IsItemItsOwnContainerOverride(object item)
        {
            return item is SudokuGroup;
        }

        /// <summary>
        /// 创建或标识用于显示指定的项的元素
        /// </summary>
        /// <returns></returns>
        protected override DependencyObject GetContainerForItemOverride()
        {
            return new SudokuGroup();
        }
    }

<!--九宫格边框颜色-->
            <SolidColorBrush x:Key="Sudoku_Parent_BorderBrush" Color="#0A3043"/>
            <!--九宫格边框大小-->
            <Thickness x:Key="Sudoku_Parent_BorderThickness">2</Thickness>
            <!--九宫格圆角半径-->
            <CornerRadius x:Key="Sudoku_Radius">10</CornerRadius>
            <system:Double x:Key="Sudoku_Double_Radius">10</system:Double>
            <!--数独单元格边框颜色-->
            <SolidColorBrush x:Key="Sudoku_Item_BorderBrush" Color="#0A3043"/>
            <!--数独单元格边框大小-->
            <Thickness x:Key="Sudoku_Item_BorderThickness">0.5</Thickness>
            <!--数独单元格字体大小-->
            <system:Double x:Key="Sudoku_Item_Value_FontSize">25</system:Double>
            <!--数独单元格 默认生成的字体颜色-->
            <SolidColorBrush x:Key="Sudoku_Item_Prefedined_Foreground" Color="#8F9CA3"/>
            <!--数独单元格 字体颜色-->
            <SolidColorBrush x:Key="Sudoku_Item_Value_Foreground" Color="#0A3043"/>

<common:SudokuGroupStyleSelector x:Key="groupStyleSelector"/>

    <!--数独面板 样式-->
    <Style TargetType="local:SudokuPanel">
        <Setter Property="BorderBrush" Value="{DynamicResource Sudoku_Parent_BorderBrush}"/>
        <Setter Property="BorderThickness" Value="{DynamicResource Sudoku_Parent_BorderThickness }"/>
        <Setter Property="Background" Value="Transparent"/>
        <Setter Property="SnapsToDevicePixels" Value="True"/>
        <Setter Property="Border.CornerRadius" Value="{DynamicResource Sudoku_Radius}"/>
        <Setter Property="ItemContainerStyleSelector" Value="{DynamicResource groupStyleSelector}"/>
        <Setter Property="ItemsPanel">
            <Setter.Value>
                <ItemsPanelTemplate>
                    <UniformGrid Rows="3" Columns="3"/>
                </ItemsPanelTemplate>
            </Setter.Value>
        </Setter>
        <Setter Property="Template">
            <Setter.Value>
                <ControlTemplate TargetType="local:SudokuPanel">
                    <Border BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" Background="{TemplateBinding Background}" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" CornerRadius="{TemplateBinding Border.CornerRadius}">
                        <ItemsPresenter/>
                    </Border>
                    <ControlTemplate.Triggers>
                        <Trigger Property="IsMouseOver" Value="True">
                            <Setter Property="Cursor" Value="Hand"/>
                        </Trigger>
                    </ControlTemplate.Triggers>
                </ControlTemplate>
            </Setter.Value>
        </Setter>
    </Style>

WPF 自定义ItemsControl三层嵌套无法生成第三层控件

现在运行程序，只会显示到SudokuGroup层级，不明白为什么会这样？该如何修改？

相关推荐