WPF中TreeView控件的使用案例

选中文件：

using System;
using System.Collections.Generic;
using System.IO;
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;
using TreeViewDemo.ViewModel;

namespace TreeViewDemo
{
    /// 

    /// MainWindow.xaml 的交互逻辑
    /// 
    public partial class MainWindow : Window
    {
        MainWindowViewModel viewModel = new MainWindowViewModel();
        List fileTreeData = new List();
        public MainWindow()
        {
            InitializeComponent();
        }
        /// 

        /// 每一天照片统计
        /// 
        public static int total = 0;
        /// 

        /// 获取照片目录集合
        /// 
        /// 
        /// 
        /// 
        public List GetAllFiles(DirectoryInfo dir, FileTreeModel d)
        {
            List FileList = new List();
            FileInfo[] allFile = dir.GetFiles();
            total = allFile.Count();
            foreach (FileInfo fi in allFile)
                d.Subitem.Add(new FileTreeModel() { FileName = fi.Name, FilePath = fi.FullName, FileType = (int)FieleTypeEnum.Picture, Icon = "../refresh/picture.ico" });

            DirectoryInfo[] allDir = dir.GetDirectories();
            foreach (DirectoryInfo dif in allDir)
            {
                FileTreeModel fileDir = new FileTreeModel() { FileName = dif.Name, FilePath = dif.FullName, FileType = (int)FieleTypeEnum.Folder, Icon = "../refresh/folder.ico" };
                GetAllFiles(dif, fileDir);
                fileDir.SubitemCount = string.Format($"({total})");
                FileList.Add(fileDir);

            }
            return FileList;
        }
        /// 

        /// Tab选择事件
        /// 
        /// 
        /// 
        private void TabControl_SelectionChanged(object sender, SelectionChangedEventArgs e)
        {
            if (e.Source is TabControl)
            {
                if (e.AddedItems != null && e.AddedItems.Count > 0)
                {
                    if (e.AddedItems[0] is TabItem)
                    {
                        TabItem tabItem = e.AddedItems[0] as TabItem;
                        if (tabItem.Header.ToString() == "过磅记录")
                        {

                        }
                        if (tabItem.Header.ToString() == "照片预览")
                        { 
                            string dataDir = AppDomain.CurrentDomain.BaseDirectory + "ImageLogs\\";

                            fileTreeData = GetAllFiles(new System.IO.DirectoryInfo(dataDir), new FileTreeModel()).OrderByDescending(s=>s.FileName).ToList();
                            this.departmentTree.ItemsSource = fileTreeData;
                        }
                    }
                }
            }
        }
          
        /// 

        /// 文件树选中事件
        /// 
        /// 
        /// 
        private void departmentTree_PreviewMouseUp(object sender, MouseButtonEventArgs e)
        {
            try
            {
                if (departmentTree.SelectedItem != null)
                {
                    FileTreeModel selectedTnh = departmentTree.SelectedItem as FileTreeModel;
                    viewModel.Model.SelectFileleName = selectedTnh.FileName;

                    if (selectedTnh.FileType == (int)FieleTypeEnum.Picture)
                    {
                        BitmapImage imagesouce = new BitmapImage();
                        imagesouce = new BitmapImage(new Uri(selectedTnh.FilePath));//Uri("图片路径")
                        MyImage.Source = imagesouce.Clone();
                    }
                }
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.ToString());
            }
           

        } 
        private void Window_Loaded(object sender, RoutedEventArgs e)
        {
            // 绑定数据源
            this.DataContext = viewModel; 
        }


    }
}