Blend 修改TreeViewItem樣式

来源:https://www.cnblogs.com/njit-77/archive/2020/02/13/12303397.html

Blend 修改TreeViewItem樣式 1、用Blend for Visual Studio 2019 新建Wpf項目,拖動一個TreeView控制項到Grid上 2、在繪圖視窗選中TreeViewItem,右鍵編輯模版 編輯副本 3、繪製水平、垂直虛線( "參考博文" ) 在TreeViewI ...


Blend 修改TreeViewItem樣式

1、用Blend for Visual Studio 2019 新建Wpf項目,拖動一個TreeView控制項到Grid上

    <Grid>
        <TreeView>
            <TreeViewItem Header="TreeViewItem">
                <TreeViewItem Header="TreeViewItem"/>
            </TreeViewItem>
            <TreeViewItem Header="TreeViewItem">
                <TreeViewItem Header="TreeViewItem"/>
            </TreeViewItem>
        </TreeView>
    </Grid>

2、在繪圖視窗選中TreeViewItem,右鍵編輯模版->編輯副本

3、繪製水平、垂直虛線(參考博文

在TreeViewItem ControlTemplate模板中增加

<!-- Connecting Lines -->
<!-- Horizontal line -->
<Rectangle x:Name="HorLn" 
           Margin="10,0,0,0" 
           Height="1" 
           Stroke="#FF565656" 
           SnapsToDevicePixels="True" 
           StrokeDashCap="Square" 
           StrokeDashOffset="1"/>

<!-- Vertical line -->
<Rectangle x:Name="VerLn" 
           Width="1" 
           Stroke="#FF565656" 
           Margin="0,0,-2,0" 
           Grid.RowSpan="2" 
           SnapsToDevicePixels="true" 
           Fill="White" 
           StrokeDashCap="Square" 
           StrokeDashArray="1,5"/>

對於當前層最後一個節點,不再畫它水平方向線以下的垂直線,這裡使用到轉換器完成

    class TreeViewLineConverter : IValueConverter
    {
        public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
        {
            var item = value as TreeViewItem;
            ItemsControl ic = ItemsControl.ItemsControlFromItemContainer(item);
            return ic.ItemContainerGenerator.IndexFromContainer(item) == ic.Items.Count - 1;
        }

        public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
        {
            return false;
        }
    }

觸發器需增加代碼

                            <!-- 當前層最後一個元素不畫下方垂直線 -->
                            <DataTrigger Binding="{Binding RelativeSource={RelativeSource Self}, Converter={StaticResource LineConverter}}" Value="true">
                                <Setter TargetName="VerLn" Property="Height" Value="15"/>
                                <Setter TargetName="VerLn" Property="VerticalAlignment" Value="Top"/>
                            </DataTrigger>
                            <!-- Root第一個元素不顯示上方垂直線 -->
                            <Trigger Property="TabIndex" Value="1">
                                <Setter TargetName="VerLn" Property="Margin" Value="0,12,1,0"/>
                                <Setter TargetName="VerLn" Property="Height" Value="Auto"/>
                            </Trigger>

完整樣式代碼

        <Style x:Key="TreeViewItemFocusVisual">
            <Setter Property="Control.Template">
                <Setter.Value>
                    <ControlTemplate>
                        <Rectangle/>
                    </ControlTemplate>
                </Setter.Value>
            </Setter>
        </Style>
        <SolidColorBrush x:Key="TreeViewItem.TreeArrow.Static.Checked.Fill" Color="#FF595959"/>
        <SolidColorBrush x:Key="TreeViewItem.TreeArrow.Static.Checked.Stroke" Color="#FF262626"/>
        <SolidColorBrush x:Key="TreeViewItem.TreeArrow.MouseOver.Stroke" Color="#FF27C7F7"/>
        <SolidColorBrush x:Key="TreeViewItem.TreeArrow.MouseOver.Fill" Color="#FFCCEEFB"/>
        <SolidColorBrush x:Key="TreeViewItem.TreeArrow.MouseOver.Checked.Stroke" Color="#FF1CC4F7"/>
        <SolidColorBrush x:Key="TreeViewItem.TreeArrow.MouseOver.Checked.Fill" Color="#FF82DFFB"/>
        <PathGeometry x:Key="TreeArrow" Figures="M0,0 L0,6 L6,0 z"/>
        <SolidColorBrush x:Key="TreeViewItem.TreeArrow.Static.Fill" Color="#FFFFFFFF"/>
        <SolidColorBrush x:Key="TreeViewItem.TreeArrow.Static.Stroke" Color="#FF818181"/>
        <Style x:Key="ExpandCollapseToggleStyle" TargetType="{x:Type ToggleButton}">
            <Setter Property="Focusable" Value="False"/>
            <Setter Property="Width" Value="16"/>
            <Setter Property="Height" Value="16"/>
            <Setter Property="Template">
                <Setter.Value>
                    <ControlTemplate TargetType="{x:Type ToggleButton}">
                        <Border Background="Transparent" Height="16" Padding="5,5,5,5" Width="16">
                            <Path x:Name="ExpandPath" Data="{StaticResource TreeArrow}" Fill="{StaticResource TreeViewItem.TreeArrow.Static.Fill}" Stroke="{StaticResource TreeViewItem.TreeArrow.Static.Stroke}">
                                <Path.RenderTransform>
                                    <RotateTransform Angle="135" CenterY="3" CenterX="3"/>
                                </Path.RenderTransform>
                            </Path>
                        </Border>
                        <ControlTemplate.Triggers>
                            <Trigger Property="IsChecked" Value="True">
                                <Setter Property="RenderTransform" TargetName="ExpandPath">
                                    <Setter.Value>
                                        <RotateTransform Angle="180" CenterY="3" CenterX="3"/>
                                    </Setter.Value>
                                </Setter>
                                <Setter Property="Fill" TargetName="ExpandPath" Value="{StaticResource TreeViewItem.TreeArrow.Static.Checked.Fill}"/>
                                <Setter Property="Stroke" TargetName="ExpandPath" Value="{StaticResource TreeViewItem.TreeArrow.Static.Checked.Stroke}"/>
                            </Trigger>
                            <Trigger Property="IsMouseOver" Value="True">
                                <Setter Property="Stroke" TargetName="ExpandPath" Value="{StaticResource TreeViewItem.TreeArrow.MouseOver.Stroke}"/>
                                <Setter Property="Fill" TargetName="ExpandPath" Value="{StaticResource TreeViewItem.TreeArrow.MouseOver.Fill}"/>
                            </Trigger>
                            <MultiTrigger>
                                <MultiTrigger.Conditions>
                                    <Condition Property="IsMouseOver" Value="True"/>
                                    <Condition Property="IsChecked" Value="True"/>
                                </MultiTrigger.Conditions>
                                <Setter Property="Stroke" TargetName="ExpandPath" Value="{StaticResource TreeViewItem.TreeArrow.MouseOver.Checked.Stroke}"/>
                                <Setter Property="Fill" TargetName="ExpandPath" Value="{StaticResource TreeViewItem.TreeArrow.MouseOver.Checked.Fill}"/>
                            </MultiTrigger>
                        </ControlTemplate.Triggers>
                    </ControlTemplate>
                </Setter.Value>
            </Setter>
        </Style>

        <local:TreeViewLineConverter x:Key="LineConverter"/>
        <Style TargetType="{x:Type TreeViewItem}">
            <Setter Property="Background" Value="Transparent"/>
            <Setter Property="HorizontalContentAlignment" Value="{Binding HorizontalContentAlignment, RelativeSource={RelativeSource AncestorType={x:Type ItemsControl}}}"/>
            <Setter Property="VerticalContentAlignment" Value="{Binding VerticalContentAlignment, RelativeSource={RelativeSource AncestorType={x:Type ItemsControl}}}"/>
            <Setter Property="Padding" Value="1,0,0,0"/>
            <Setter Property="Foreground" Value="{DynamicResource {x:Static SystemColors.ControlTextBrushKey}}"/>
            <Setter Property="FocusVisualStyle" Value="{StaticResource TreeViewItemFocusVisual}"/>
            <Setter Property="Template">
                <Setter.Value>
                    <ControlTemplate TargetType="{x:Type TreeViewItem}">
                        <Grid>
                            <Grid.ColumnDefinitions>
                                <ColumnDefinition MinWidth="19" Width="Auto"/>
                                <ColumnDefinition Width="Auto"/>
                                <ColumnDefinition Width="*"/>
                            </Grid.ColumnDefinitions>
                            <Grid.RowDefinitions>
                                <RowDefinition Height="Auto"/>
                                <RowDefinition/>
                            </Grid.RowDefinitions>
                            
                             <!--Connecting Lines--> 
                             <!--Horizontal line--> 
                            <Rectangle x:Name="HorLn" Margin="10,0,0,0" Height="1" Stroke="#FF565656" SnapsToDevicePixels="True" StrokeDashCap="Square" StrokeDashOffset="1"/>
                             <!--Vertical line--> 
                            <Rectangle x:Name="VerLn" Width="1" Stroke="#FF565656" Margin="0,0,-2,0" Grid.RowSpan="2" SnapsToDevicePixels="true" Fill="White" StrokeDashCap="Square" StrokeDashArray="1,5"/>

                            <ToggleButton x:Name="Expander" ClickMode="Press" IsChecked="{Binding IsExpanded, RelativeSource={RelativeSource TemplatedParent}}" Style="{StaticResource ExpandCollapseToggleStyle}"/>
                            <Border x:Name="Bd" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" Background="{TemplateBinding Background}" Grid.Column="1" Padding="{TemplateBinding Padding}" SnapsToDevicePixels="true">
                                <ContentPresenter x:Name="PART_Header" ContentSource="Header" HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"/>
                            </Border>
                            <ItemsPresenter x:Name="ItemsHost" Grid.ColumnSpan="2" Grid.Column="1" Grid.Row="1"/>
                        </Grid>
                        <ControlTemplate.Triggers>
                            <Trigger Property="IsExpanded" Value="false">
                                <Setter Property="Visibility" TargetName="ItemsHost" Value="Collapsed"/>
                            </Trigger>
                            <Trigger Property="HasItems" Value="false">
                                <Setter Property="Visibility" TargetName="Expander" Value="Hidden"/>
                            </Trigger>
                            <Trigger Property="IsSelected" Value="true">
                                <Setter Property="Background" TargetName="Bd" Value="{DynamicResource {x:Static SystemColors.HighlightBrushKey}}"/>
                                <Setter Property="Foreground" Value="{DynamicResource {x:Static SystemColors.HighlightTextBrushKey}}"/>
                            </Trigger>
                            <MultiTrigger>
                                <MultiTrigger.Conditions>
                                    <Condition Property="IsSelected" Value="true"/>
                                    <Condition Property="IsSelectionActive" Value="false"/>
                                </MultiTrigger.Conditions>
                                <Setter Property="Background" TargetName="Bd" Value="{DynamicResource {x:Static SystemColors.InactiveSelectionHighlightBrushKey}}"/>
                                <Setter Property="Foreground" Value="{DynamicResource {x:Static SystemColors.InactiveSelectionHighlightTextBrushKey}}"/>
                            </MultiTrigger>
                            <Trigger Property="IsEnabled" Value="false">
                                <Setter Property="Foreground" Value="{DynamicResource {x:Static SystemColors.GrayTextBrushKey}}"/>
                            </Trigger>

                            <!-- 當前層最後一個元素不畫下方垂直線 -->
                            <DataTrigger Binding="{Binding RelativeSource={RelativeSource Self}, Converter={StaticResource LineConverter}}" Value="true">
                                <Setter TargetName="VerLn" Property="Height" Value="15"/>
                                <Setter TargetName="VerLn" Property="VerticalAlignment" Value="Top"/>
                            </DataTrigger>
                            <!-- Root第一個元素不顯示上方垂直線 -->
                            <Trigger Property="TabIndex" Value="1">
                                <Setter TargetName="VerLn" Property="Margin" Value="0,12,1,0"/>
                                <Setter TargetName="VerLn" Property="Height" Value="Auto"/>
                            </Trigger>
                        </ControlTemplate.Triggers>
                    </ControlTemplate>
                </Setter.Value>
            </Setter>
            <Style.Triggers>
                <Trigger Property="VirtualizingPanel.IsVirtualizing" Value="true">
                    <Setter Property="ItemsPanel">
                        <Setter.Value>
                            <ItemsPanelTemplate>
                                <VirtualizingStackPanel/>
                            </ItemsPanelTemplate>
                        </Setter.Value>
                    </Setter>
                </Trigger>
            </Style.Triggers>
        </Style>

效果圖如下

4、TreeViewItem顯示圖片以及名稱

        <TreeView ItemsSource="{Binding Tools}">
            <TreeView.Resources>
                <local:UriToImageSourceConverter x:Key="UriToImageSource"/>
            </TreeView.Resources>
            <TreeView.ItemTemplate>
                <HierarchicalDataTemplate ItemsSource="{Binding Nodes}">
                    <DockPanel>
                        <Image Source="{Binding PicPath, Converter={StaticResource UriToImageSource}}" Width="25" Height="25"/>
                        <TextBlock Text="{Binding Name}" FontSize="13" VerticalAlignment="Center" Margin="3,0,0,0"/>
                    </DockPanel>
                </HierarchicalDataTemplate>
            </TreeView.ItemTemplate>
        </TreeView>

Tools是數據集合,節點集合Nodes。PicPath保存圖片名稱,使用UriToImageSourceConverter轉換器轉換成BitmapImage類型顯示。

    class UriToImageSourceConverter : IValueConverter
    {
        public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
        {
            string path = (string)value;
            if (string.IsNullOrEmpty(path))
            {
                path = "pack://application:,,,/WpfApp2;component/position.ico";//預設圖片
            }
            return new BitmapImage(new Uri(path, UriKind.Absolute));
        }

        public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
        {
            return false;
        }
    }

效果圖如下

完整代碼

<Window x:Class="WpfApp2.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
        xmlns:local="clr-namespace:WpfApp2"
        mc:Ignorable="d"
        Title="MainWindow" Height="450" Width="800">


    <Window.Resources>
        <Style x:Key="TreeViewItemFocusVisual">
            <Setter Property="Control.Template">
                <Setter.Value>
                    <ControlTemplate>
                        <Rectangle/>
                    </ControlTemplate>
                </Setter.Value>
            </Setter>
        </Style>
        <SolidColorBrush x:Key="TreeViewItem.TreeArrow.Static.Checked.Fill" Color="#FF595959"/>
        <SolidColorBrush x:Key="TreeViewItem.TreeArrow.Static.Checked.Stroke" Color="#FF262626"/>
        <SolidColorBrush x:Key="TreeViewItem.TreeArrow.MouseOver.Stroke" Color="#FF27C7F7"/>
        <SolidColorBrush x:Key="TreeViewItem.TreeArrow.MouseOver.Fill" Color="#FFCCEEFB"/>
        <SolidColorBrush x:Key="TreeViewItem.TreeArrow.MouseOver.Checked.Stroke" Color="#FF1CC4F7"/>
        <SolidColorBrush x:Key="TreeViewItem.TreeArrow.MouseOver.Checked.Fill" Color="#FF82DFFB"/>
        <PathGeometry x:Key="TreeArrow" Figures="M0,0 L0,6 L6,0 z"/>
        <SolidColorBrush x:Key="TreeViewItem.TreeArrow.Static.Fill" Color="#FFFFFFFF"/>
        <SolidColorBrush x:Key="TreeViewItem.TreeArrow.Static.Stroke" Color="#FF818181"/>
        <Style x:Key="ExpandCollapseToggleStyle" TargetType="{x:Type ToggleButton}">
            <Setter Property="Focusable" Value="False"/>
            <Setter Property="Width" Value="16"/>
            <Setter Property="Height" Value="16"/>
            <Setter Property="Template">
                <Setter.Value>
                    <ControlTemplate TargetType="{x:Type ToggleButton}">
                        <Border Background="Transparent" Height="16" Padding="5,5,5,5" Width="16">
                            <Path x:Name="ExpandPath" Data="{StaticResource TreeArrow}" Fill="{StaticResource TreeViewItem.TreeArrow.Static.Fill}" Stroke="{StaticResource TreeViewItem.TreeArrow.Static.Stroke}">
                                <Path.RenderTransform>
                                    <RotateTransform Angle="135" CenterY="3" CenterX="3"/>
                                </Path.RenderTransform>
                            </Path>
                        </Border>
                        <ControlTemplate.Triggers>
                            <Trigger Property="IsChecked" Value="True">
                                <Setter Property="RenderTransform" TargetName="ExpandPath">
                                    <Setter.Value>
                                        <RotateTransform Angle="180" CenterY="3" CenterX="3"/>
                                    </Setter.Value>
                                </Setter>
                                <Setter Property="Fill" TargetName="ExpandPath" Value="{StaticResource TreeViewItem.TreeArrow.Static.Checked.Fill}"/>
                                <Setter Property="Stroke" TargetName="ExpandPath" Value="{StaticResource TreeViewItem.TreeArrow.Static.Checked.Stroke}"/>
                            </Trigger>
                            <Trigger Property="IsMouseOver" Value="True">
                                <Setter Property="Stroke" TargetName="ExpandPath" Value="{StaticResource TreeViewItem.TreeArrow.MouseOver.Stroke}"/>
                                <Setter Property="Fill" TargetName="ExpandPath" Value="{StaticResource TreeViewItem.TreeArrow.MouseOver.Fill}"/>
                            </Trigger>
                            <MultiTrigger>
                                <MultiTrigger.Conditions>
                                    <Condition Property="IsMouseOver" Value="True"/>
                                    <Condition Property="IsChecked" Value="True"/>
                                </MultiTrigger.Conditions>
                                <Setter Property="Stroke" TargetName="ExpandPath" Value="{StaticResource TreeViewItem.TreeArrow.MouseOver.Checked.Stroke}"/>
                                <Setter Property="Fill" TargetName="ExpandPath" Value="{StaticResource TreeViewItem.TreeArrow.MouseOver.Checked.Fill}"/>
                            </MultiTrigger>
                        </ControlTemplate.Triggers>
                    </ControlTemplate>
                </Setter.Value>
            </Setter>
        </Style>

        <local:TreeViewLineConverter x:Key="LineConverter"/>
        <Style TargetType="{x:Type TreeViewItem}">
            <Setter Property="Background" Value="Transparent"/>
            <Setter Property="HorizontalContentAlignment" Value="{Binding HorizontalContentAlignment, RelativeSource={RelativeSource AncestorType={x:Type ItemsControl}}}"/>
            <Setter Property="VerticalContentAlignment" Value="{Binding VerticalContentAlignment, RelativeSource={RelativeSource AncestorType={x:Type ItemsControl}}}"/>
            <Setter Property="Padding" Value="1,0,0,0"/>
            <Setter Property="Foreground" Value="{DynamicResource {x:Static SystemColors.ControlTextBrushKey}}"/>
            <Setter Property="FocusVisualStyle" Value="{StaticResource TreeViewItemFocusVisual}"/>
            <Setter Property="Template">
                <Setter.Value>
                    <ControlTemplate TargetType="{x:Type TreeViewItem}">
                        <Grid>
                            <Grid.ColumnDefinitions>
                                <ColumnDefinition MinWidth="19" Width="Auto"/>
                                <ColumnDefinition Width="Auto"/>
                                <ColumnDefinition Width="*"/>
                            </Grid.ColumnDefinitions>
                            <Grid.RowDefinitions>
                                <RowDefinition Height="Auto"/>
                                <RowDefinition/>
                            </Grid.RowDefinitions>
                            
                             <!--Connecting Lines--> 
                             <!--Horizontal line--> 
                            <Rectangle x:Name="HorLn" Margin="10,0,0,0" Height="1" Stroke="#FF565656" SnapsToDevicePixels="True" StrokeDashCap="Square" StrokeDashOffset="1"/>
                             <!--Vertical line--> 
                            <Rectangle x:Name="VerLn" Width="1" Stroke="#FF565656" Margin="0,0,-2,0" Grid.RowSpan="2" SnapsToDevicePixels="true" Fill="White" StrokeDashCap="Square" StrokeDashArray="1,5"/>

                            <ToggleButton x:Name="Expander" ClickMode="Press" IsChecked="{Binding IsExpanded, RelativeSource={RelativeSource TemplatedParent}}" Style="{StaticResource ExpandCollapseToggleStyle}"/>
                            <Border x:Name="Bd" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" Background="{TemplateBinding Background}" Grid.Column="1" Padding="{TemplateBinding Padding}" SnapsToDevicePixels="true">
                                <ContentPresenter x:Name="PART_Header" ContentSource="Header" HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"/>
                            </Border>
                            <ItemsPresenter x:Name="ItemsHost" Grid.ColumnSpan="2" Grid.Column="1" Grid.Row="1"/>
                        </Grid>
                        <ControlTemplate.Triggers>
                            <Trigger Property="IsExpanded" Value="false">
                                <Setter Property="Visibility" TargetName="ItemsHost" Value="Collapsed"/>
                            </Trigger>
                            <Trigger Property="HasItems" Value="false">
                                <Setter Property="Visibility" TargetName="Expander" Value="Hidden"/>
                            </Trigger>
                            <Trigger Property="IsSelected" Value="true">
                                <Setter Property="Background" TargetName="Bd" Value="{DynamicResource {x:Static SystemColors.HighlightBrushKey}}"/>
                                <Setter Property="Foreground" Value="{DynamicResource {x:Static SystemColors.HighlightTextBrushKey}}"/>
                            </Trigger>
                            <MultiTrigger>
                                <MultiTrigger.Conditions>
                                    <Condition Property="IsSelected" Value="true"/>
                                    <Condition Property="IsSelectionActive" Value="false"/>
                                </MultiTrigger.Conditions>
                                <Setter Property="Background" TargetName="Bd" Value="{DynamicResource {x:Static SystemColors.InactiveSelectionHighlightBrushKey}}"/>
                                <Setter Property="Foreground" Value="{DynamicResource {x:Static SystemColors.InactiveSelectionHighlightTextBrushKey}}"/>
                            </MultiTrigger>
                            <Trigger Property="IsEnabled" Value="false">
                                <Setter Property="Foreground" Value="{DynamicResource {x:Static SystemColors.GrayTextBrushKey}}"/>
                            </Trigger>

                            <!-- 當前層最後一個元素不畫下方垂直線 -->
                            <DataTrigger Binding="{Binding RelativeSource={RelativeSource Self}, Converter={StaticResource LineConverter}}" Value="true">
                                <Setter TargetName="VerLn" Property="Height" Value="15"/>
                                <Setter TargetName="VerLn" Property="VerticalAlignment" Value="Top"/>
                            </DataTrigger>
                            <!-- Root第一個元素不顯示上方垂直線 -->
                            <Trigger Property="TabIndex" Value="1">
                                <Setter TargetName="VerLn" Property="Margin" Value="0,12,1,0"/>
                                <Setter TargetName="VerLn" Property="Height" Value="Auto"/>
                            </Trigger>
                        </ControlTemplate.Triggers>
                    </ControlTemplate>
                </Setter.Value>
            </Setter>
            <Style.Triggers>
                <Trigger Property="VirtualizingPanel.IsVirtualizing" Value="true">
                    <Setter Property="ItemsPanel">
                        <Setter.Value>
                            <ItemsPanelTemplate>
                                <VirtualizingStackPanel/>
                            </ItemsPanelTemplate>
                        </Setter.Value>
                    </Setter>
                </Trigger>
            </Style.Triggers>
        </Style>
    </Window.Resources>


    <Grid>
        <TreeView x:Name="tree" ItemsSource="{Binding Tools}">
            <TreeView.Resources>
                <local:UriToImageSourceConverter x:Key="UriToImageSource"/>
            </TreeView.Resources>
            <TreeView.ItemTemplate>
                <HierarchicalDataTemplate ItemsSource="{Binding Nodes}">
                    <DockPanel>
                        <Image Source="{Binding PicPath, Converter={StaticResource UriToImageSource}}" Width="25" Height="25"/>
                        <TextBlock Text="{Binding Name}" FontSize="13" VerticalAlignment="Center" Margin="3,0,0,0"/>
                    </DockPanel>
                </HierarchicalDataTemplate>
            </TreeView.ItemTemplate>
        </TreeView>
    </Grid>
</Window>
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;

namespace WpfApp2
{
    /// <summary>
    /// MainWindow.xaml 的交互邏輯
    /// </summary>
    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();


            Tools = new List<NodeX>();

            for (int i = 0; i < 5; i++)
            {
                Tools.Add(new NodeX()
                {
                    Name = $"Save_{i + 1}",
                    PicPath = "pack://application:,,,/WpfApp2;component/Save.png",
                });

                for (int j = i; j < 5; j++)
                {
                    if (Tools[i].Nodes == null)
                    {
                        Tools[i].Nodes = new List<NodeX>();
                    }
                    Tools[i].Nodes.Add(new NodeX()
                    {
                        Name = $"Exit_{i + 1}_{j + 1}",
                        PicPath = "pack://application:,,,/WpfApp2;component/Exit.png",
                    });
                }
            }

            tree.ItemsSource = Tools;
        }


        public List<NodeX> Tools { get; set; }

    }

    class TreeViewLineConverter : IValueConverter
    {
        public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
        {
            var item = value as TreeViewItem;
            ItemsControl ic = ItemsControl.ItemsControlFromItemContainer(item);
            return ic.ItemContainerGenerator.IndexFromContainer(item) == ic.Items.Count - 1;
        }

        public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
        {
            return false;
        }
    }

    class UriToImageSourceConverter : IValueConverter
    {
        public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
        {
            string path = (string)value;
            if (string.IsNullOrEmpty(path))
            {
                path = "pack://application:,,,/WpfApp2;component/position.ico";
            }
            return new BitmapImage(new Uri(path, UriKind.Absolute));
        }

        public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
        {
            return false;
        }
    }


   public class NodeX
    {

        #region Property

        /// <summary>顯示內容</summary>
        public string Name { get; set; }

        /// <summary>顯示圖片路徑</summary>
        public string PicPath { get; set; }

        /// <summary>子節點,預設null</summary>
        public IList<NodeX> Nodes { get; set; }

        #endregion

    }

}

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  • 前言 對於服務端,達到高性能、高擴展離不開非同步。對於客戶端,函數執行時間是1毫秒還是100毫秒差別不大,沒必要為這一點點時間煞費苦心。對於非同步,好多人還有誤解,如: 非同步就是多線程;非同步就是如何利用好線程池。非同步不是這麼簡單,否則微軟沒必要在非同步上花費這麼多心思。本文就介紹非同步最新的實現方式:Tas ...
  • 在工作中,會遇到需要多線程處理相應的業務需求,最典型的包括Socket的通信。 多線程處理里,就會考慮到,哪個線程先運行,哪個線程後運行的情況。 這裡我介紹一下,使用ManualResetEvent類來對線程進行阻塞和繼續操作。 它有三個重要的方法:Reset、Set和WaitOne。 1、首先介紹 ...
  • RedHat7安裝NetCore環境併發布網站 1.註冊Microsoft簽名密鑰並添加Microsoft產品提要,每台機器只需註冊一次 執行下麵的命令即可 rpm -Uvh https://packages.microsoft.com/config/rhel/7/packages-microsof ...
  • 學習劉鐵猛老師《C#語言入門詳解》視頻,針對其中重點知識點進行總結。 1、什麼是類型? 類型又稱為數據類型(Data Type),數據類型在數據結構中的定義是一個值的集合以及定義在這個值集上的一組操作。 可以簡單理解為數據在記憶體中存儲的“型號”;小記憶體容納大尺寸數據會丟失精準度,發生錯誤;而大記憶體容 ...
  • 在WPF用戶界面中,繪製2D圖形內容的最簡單方法是使用形狀(shape)——專門用於表示簡單的直線、橢圓、矩形以及多變形的一些類。從技術角度看,形狀就是所謂的繪圖圖元(primitive)。可組合這些基本元素來創建更複雜的圖形。 關於WPF中形狀的重要細節是,它們都繼承自FrameworkEleme ...
一周排行
  • .NET 走向開源,MIT許可協議。 微軟為了推動.NET開源社區的發展,2014年聯合社區成立了.NET基金會。 一年前 .NET 基金會完成第一次全面改選,2014年 .NET基金會的創始成員中有六位創始人,均非微軟公司員工,隨著微軟的收購動作,Miguel 也成了微軟員工,Migel一直在努力 ...
  • 在這篇文章中,我將帶領大家詳細學習ASP.NET Core 中的Main方法。在這篇文章中,我將向大家詳細介紹下麵幾個問題:ASP.NET Core Main方法的重要性為什麼我們在ASP.NET Core中會有一個Main方法?當你運行一個ASP.NET Core應用程式的時候,背後發生了什麼?為... ...
  • IViewLocationExpander API ExpandViewLocations Razor視圖路徑,視圖引擎會搜索該路徑. PopulateValues 每次調用都會填充路由 項目目錄如下所示 創建區域擴展器,其實我並不需要多區域,我目前只需要達到一個區域中有多個文件夾進行存放我的視圖. ...
  • EF Core 數據變更自動審計設計 Intro 有的時候我們需要知道每個數據表的變更記錄以便做一些數據審計,數據恢復以及數據同步等之類的事情, EF 自帶了對象追蹤,使得我們可以很方便的做一些審計工作,每次變更發生了什麼變化都變得很清晰,於是就基於 EF 封裝了一層數據變更自動審計 使用效果 測試 ...
  • 在上一篇文章abp(net core)+easyui+efcore實現倉儲管理系統——入庫管理之六(四十二)中我們實現了新增入庫單的功能。結合之前的五篇文章,今天我們來測試一下入庫單新增功能。 ...
  • 這篇文章,我們一起學習ASP.NET Core InProcess Hosting.這篇文章主要討論下麵幾個觀點:CreateDefaultBuilder方法執行什麼任務?什麼是ASP.NET Core InProcess Hosting?怎麼使用InProcess hosting Model來托管... ...
  • 關於 Blazor Server Side 的開篇 , Blazor與 C/S , B/S 有什麼不一樣 , Blazor有什麼優缺點? ...
  • VS2019+MVC+EF6 CodeFirst 連接MySQL 1、準備環境(通過NuGet獲取) EntityFramework MySql.Data.Entity 安裝後確認 2、在MVC Model文件夾下添加一個學生類,後面用它通過[數據遷移]在MySQL中創建一個表 3、創建數據上下文 ...
  • 這篇文章,向大家介紹ASP.NET Core中的Kestrel Web伺服器。這篇文章主要討論下麵兩個重要的事情:什麼是Kestrel 伺服器?怎麼使用.NET Core CLI來運行ASP.NET Core應用程式?什麼是Kestrel伺服器? 我們已經知道ASP.NET Core是一個跨平臺的開... ...
  • 前言 回顧之前的兩篇Swagger做Api介面文檔,我們大體上學會瞭如何在net core3.1的項目基礎上,搭建一套自動生產API介面說明文檔的框架。 本來在Swagger的基礎上,前後端開發人員在開發生產期間,可以藉此進行更加便捷的溝通交流。可是總有些時候,遇到一些難纏的,又不講道理,偏偏覺得將 ...