基于WPF实现面包屑效果的示例代码

Yasmin ·

更新时间:2024-11-13

· 1765 次阅读

WPF 简单实现面包屑

框架使用.NET4 至 .NET6；

Visual Studio 2022;

面包屑展示使用控件如下：

Button 做首页按钮，当点击时回到首页。

ItemsControl 做面包屑 Item 展示，DataTemplate -> Hyperlink > 做点击时回到当前 Item。

ListView 展示当前 Item 的子项，也可以换做 ListBox 控件或其他。

效果图

实现代码

1）创建 BreadCrumbBarExample.xaml 代码如下:

<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>

2） BreadCrumbBarExample.xaml.cs 代码如下:

BreadCrumbBars 记录面包屑的值。

Files 记录当前的子项。

当点击面包屑则删除当前至末尾的所有数据 List.RemoveRange(0, List.Count - 0);。

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;
    }
}

到此这篇关于基于WPF实现面包屑效果的示例代码的文章就介绍到这了,更多相关WPF面包屑内容请搜索软件开发网以前的文章或继续浏览下面的相关文章希望大家以后多多支持软件开发网！

面包示例 wpf 面包屑

1024 个赞