基于WPF实现面包屑效果的示例代码

<wd:Window?x:Class="WpfApp1.BreadCrumbBarExample"
????????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:wd="https://github.com/WPFDevelopersOrg/WPFDevelopers"
????????xmlns:local="clr-namespace:WpfApp1"
????????mc:Ignorable="d"
????????Title="BreadCrumbBarExample?-?面包屑"?Height="450"?Width="800">
????<Grid>
????????<Grid.RowDefinitions>
????????????<RowDefinition?Height="Auto"/>
????????????<RowDefinition/>
????????</Grid.RowDefinitions>
????????<Grid?Margin="0,5">
????????????<Grid.ColumnDefinitions>
????????????????<ColumnDefinition?Width="Auto"/>
????????????????<ColumnDefinition/>
????????????</Grid.ColumnDefinitions>
????????????<Button?Style="{StaticResource?PathButton}"?ToolTip="主页"
????????????????????Click="btnHome_Click"?Cursor="Hand">
????????????????<Path?Data="M804.571?566.857v274.286q0?14.857-10.857?25.714t-25.714?10.857h-219.429v-219.429h-146.286v219.429h-219.429q-14.857?0-25.714-10.857t-10.857-25.714v-274.286q0-0.571?0.286-1.714t0.286-1.714l328.571-270.857?328.571?270.857q0.571?1.143?0.571?3.429zM932?527.429l-35.429?42.286q-4.571?5.143-12?6.286h-1.714q-7.429?0-12-4l-395.429-329.714-395.429?329.714q-6.857?4.571-13.714?4-7.429-1.143-12-6.286l-35.429-42.286q-4.571-5.714-4-13.429t6.286-12.286l410.857-342.286q18.286-14.857?43.429-14.857t43.429?14.857l139.429?116.571v-111.429q0-8?5.143-13.143t13.143-5.143h109.714q8?0?13.143?5.143t5.143?13.143v233.143l125.143?104q5.714?4.571?6.286?12.286t-4?13.429z"
??????????????????????Stretch="Uniform"?Width="15"
??????????????????????Fill="{StaticResource?PrimaryTextSolidColorBrush}"/>
????????????</Button>
????????????<ScrollViewer?HorizontalScrollBarVisibility="Auto"
??????????????????????????Grid.Column="1">
????????????????<ItemsControl?ItemsSource="{Binding?BreadCrumbBars}">
????????????????????<ItemsControl.ItemsPanel>
????????????????????????<ItemsPanelTemplate>
????????????????????????????<VirtualizingStackPanel?Orientation="Horizontal"/>
????????????????????????</ItemsPanelTemplate>
????????????????????</ItemsControl.ItemsPanel>
????????????????????<ItemsControl.ItemTemplate>
????????????????????????<DataTemplate>
????????????????????????????<TextBlock?VerticalAlignment="Center">
????????????????????????????????<Hyperlink?Click="Hyperlink_Click"
???????????????????????????????????????????Cursor="Hand">
????????????????????????????????????<Run?Text="{Binding?Name}"/>
????????????????????????????????</Hyperlink>
????????????????????????????????<Run?Text="?>?"/>
????????????????????????????</TextBlock>
????????????????????????</DataTemplate>
????????????????????</ItemsControl.ItemTemplate>
????????????????</ItemsControl>
????????????</ScrollViewer>
????????</Grid>
????????<ListView?ItemsSource="{Binding?Files}"?Grid.Row="1"
??????????????????SelectedItem="{Binding?FilesSelectedItem}"
??????????????????Name="FilesListView">
????????????<ListView.View>
????????????????<GridView>
????????????????????<GridViewColumn?Header="Name"?
????????????????????????????????????DisplayMemberBinding="{Binding?Name}"?
????????????????????????????????????Width="200"/>
????????????????</GridView>
????????????</ListView.View>
????????</ListView>
????</Grid>
</wd:Window>

using?System;
using?System.Collections.Generic;
using?System.Collections.ObjectModel;
using?System.ComponentModel;
using?System.Diagnostics;
using?System.IO;
using?System.Linq;
using?System.Reflection;
using?System.Runtime.CompilerServices;
using?System.Text;
using?System.Threading;
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.Shapes;

namespace?WpfApp1
{
????///?<summary>
????///?BreadCrumbBarExample.xaml?的交互逻辑
????///?</summary>
????public?partial?class?BreadCrumbBarExample?:?INotifyPropertyChanged
????{
????????private?ObservableCollection<FolderItem>?files;
????????public?ObservableCollection<FolderItem>?Files
????????{
????????????get?{?return?files;?}
????????????set?{?files?=?value;?OnPropertyChanged();?}
????????}

????????private?ObservableCollection<FolderItem>?breadCrumbBars;
????????public?ObservableCollection<FolderItem>?BreadCrumbBars
????????{
????????????get?{?return?breadCrumbBars;?}
????????????set?{?breadCrumbBars?=?value;?OnPropertyChanged();?}
????????}

????????private?FolderItem?filesSelectedItem;
????????public?FolderItem?FilesSelectedItem
????????{
????????????get?{?return?filesSelectedItem;?}
????????????set?{?filesSelectedItem?=?value;?OnPropertyChanged();?}
????????}

????????public?BreadCrumbBarExample()
????????{
????????????InitializeComponent();
????????????FilesListView.SelectionChanged?+=?FilesListView_SelectionChanged;
????????????DataContext?=?this;
????????????BreadCrumbBars?=?new?ObservableCollection<FolderItem>();
????????????Files?=?new?ObservableCollection<FolderItem>();
????????????Loaded?+=?BreadCrumbBarExample_Loaded;
????????}

????????private?void?BreadCrumbBarExample_Loaded(object?sender,?RoutedEventArgs?e)
????????{
????????????GetHome();
????????}
????????private?void?btnHome_Click(object?sender,?RoutedEventArgs?e)
????????{
????????????Files.Clear();
????????????GetHome();
????????????var?array?=?BreadCrumbBars.ToList();
????????????array.RemoveRange(0,?BreadCrumbBars.Count?-?0);
????????????BreadCrumbBars?=?new?ObservableCollection<FolderItem>(array);
????????}
????????private?void?Hyperlink_Click(object?sender,?RoutedEventArgs?e)
????????{
????????????var?hyperlink?=?(Hyperlink)sender;
????????????if?(hyperlink?==?null)?return;
????????????var?model?=?(FolderItem)hyperlink.DataContext;
????????????if?(model?==?null)?return;
????????????LinkFolder(model);
????????}

???????
????????private?void?FilesListView_SelectionChanged(object?sender,?SelectionChangedEventArgs?e)
????????{
????????????if?(FilesSelectedItem?==?null)?return;
????????????BreadCrumbBars.Add(FilesSelectedItem);
????????????AddFolder(FilesSelectedItem);
????????????
????????}
????????private?void?LinkFolder(FolderItem?folderItem)
????????{
????????????var?index?=?BreadCrumbBars.IndexOf(folderItem);
????????????if?(index?<?BreadCrumbBars.Count)
????????????{
????????????????var?array?=?BreadCrumbBars.ToList();
????????????????if(index?==?0)
????????????????{
????????????????????index?+=?1;
????????????????????array.RemoveRange(index,?BreadCrumbBars.Count?-?index);

????????????????}
????????????????else
????????????????????array.RemoveRange(index,?BreadCrumbBars.Count?-?index);
????????????????BreadCrumbBars?=?new?ObservableCollection<FolderItem>(array);
????????????}
????????????AddFolder(folderItem);
????????}

????????void?AddFolder(FolderItem?folderItem)
????????{
????????????try
????????????{
????????????????if?(folderItem?==?null)?return;
????????????????FilesListView.SelectedIndex?=?-1;
????????????????FilesListView.SelectedItem?=?null;
????????????????Files.Clear();
????????????????var?list?=?new?ObservableCollection<FolderItem>();
????????????????if?(File.Exists(folderItem.FullName))?return;
????????????????var?directory?=?new?DirectoryInfo(folderItem.FullName?+?@"\");
????????????????if?(directory.GetDirectories()?==?null)?return;
????????????????foreach?(var?item?in?directory.GetDirectories())
????????????????{
????????????????????var?fileInfo?=?new?FolderItem()?{?Name?=?item.Name,?FullName?=?item.FullName?};
????????????????????if?(list.Contains(fileInfo))?continue;
????????????????????Files.Add(fileInfo);
????????????????}
????????????????foreach?(var?item?in?directory.GetFiles())
????????????????{
????????????????????var?fileInfo?=?new?FolderItem()?{?Name?=?item.Name,?FullName?=?item.FullName?};
????????????????????if?(list.Contains(fileInfo))?continue;
????????????????????Files.Add(fileInfo);
????????????????}
????????????}
????????????catch?(Exception)
????????????{

????????????????throw;
????????????}
????????}

????????void?GetHome()
????????{
????????????DriveInfo[]?allDrives?=?DriveInfo.GetDrives();
????????????foreach?(DriveInfo?drive?in?allDrives)
????????????{
????????????????if?(drive.IsReady?==?true)
????????????????{
????????????????????var?fileInfo?=?new?FolderItem()?{?Name?=?drive.Name,?FullName?=?drive.Name?};
????????????????????Files.Add(fileInfo);
????????????????}
????????????}
????????}

????????public?event?PropertyChangedEventHandler?PropertyChanged;

????????protected?void?OnPropertyChanged([CallerMemberName]?string?propertyName?=?"")
????????{
????????????PropertyChanged?.Invoke(this,?new?PropertyChangedEventArgs(propertyName));
????????}
??????
????}
????public?class?FolderItem
????{
????????public?string?Name?{?get;?set;?}
????????public?string?FullName?{?get;?set;?}?=?string.Empty;
????}

}