更新整理

WPFluent.Gallery/ViewModels/Pages/Navigation/BreadcrumbBarViewModel.cs

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+// This Source Code Form is subject to the terms of the MIT License.
+// If a copy of the MIT was not distributed with this file, You can obtain one at https://opensource.org/licenses/MIT.
+// Copyright (C) Leszek Pomianowski and WPF UI Contributors.
+// All Rights Reserved.
+
+
+
+using WPFluent.Gallery.Models;
+
+namespace WPFluent.Gallery.ViewModels.Pages.Navigation;
+
+public partial class BreadcrumbBarViewModel : ViewModel
+{
+    private readonly Folder[] _baseFoldersCollection =
+    [
+        new("Home"),
+        new("Folder1"),
+        new("Folder2"),
+        new("Folder3"),
+    ];
+
+    [ObservableProperty]
+    private ObservableCollection<string> _strings =
+    [
+        "Home",
+        "Document",
+        "Design",
+        "Northwind",
+        "Images",
+        "Folder1",
+        "Folder2",
+        "Folder3",
+    ];
+
+    [ObservableProperty]
+    private ObservableCollection<Folder> _folders = new();
+
+    public BreadcrumbBarViewModel()
+    {
+        ResetFoldersCollection();
+    }
+
+    [RelayCommand]
+    private void OnStringSelected(object item) { }
+
+    [RelayCommand]
+    private void OnFolderSelected(object item)
+    {
+        if (item is not Folder selectedFolder)
+        {
+            return;
+        }
+
+        var index = Folders.IndexOf(selectedFolder);
+
+        Folders.Clear();
+
+        var counter = 0;
+        foreach (Folder folder in _baseFoldersCollection)
+        {
+            if (counter++ > index)
+            {
+                break;
+            }
+
+            Folders.Add(folder);
+        }
+    }
+
+    [RelayCommand]
+    private void OnResetFolders()
+    {
+        ResetFoldersCollection();
+    }
+
+    private void ResetFoldersCollection()
+    {
+        Folders.Clear();
+
+        foreach (Folder folder in _baseFoldersCollection)
+        {
+            Folders.Add(folder);
+        }
+    }
+}