[源碼下載]

作者：webabcd


介紹
背水一戰 Windows 10 之 文件系統

• 獲取 Package 中的文件
• 可移動存儲中的文件操作
• “庫”管理

示例
1、演示如何獲取 Package 中的文件
FileSystem/PackageData/Demo.xaml

<Page
    x:Class="Windows10.FileSystem.PackageData.Demo"
    xmlns
 
="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:local="using:Windows10.FileSystem.PackageData"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    mc:Ignorable
 
="d">

    <Grid Background="Transparent">
        <StackPanel Margin="10 0 10 10">

            <TextBlock Name="lblMsg" Margin="5" />

            <Button Name="btnRead" Content="讀取 Package 中的文件" Click="btnRead_Click" Margin="5" />

            <Image Name="img" Stretch
 
="None" HorizontalAlignment="Left" Margin="5" />

        </StackPanel>
    </Grid>
</Page>

FileSystem/PackageData/Demo.xaml.cs

/*
 * 演示如何獲取 Package 中的文件
 * 1、可以通過 Package.Current.InstalledLocation.GetFileAsync() 訪問
 * 2、可以通過 ms-appx:/// 訪問
 * 
 * 
 * StorageFile - 文件操作類
 *     public static IAsyncOperation<StorageFile> GetFileFromApplicationUriAsync(Uri uri) - 獲取本地指定 uri 的文件
 *     
 *     
 * 註：需要訪問的 Package 中的文件的屬性的“生成操作”應該設置為“內容”
 */

using System;
using Windows.Storage;
using Windows.UI.Xaml;
using Windows.UI.Xaml.Controls;

namespace Windows10.FileSystem.PackageData
{
    public sealed partial class Demo : Page
    {
        public Demo()
        {
            this.InitializeComponent();
        }

        private async void btnRead_Click(object sender, RoutedEventArgs e)
        {
            // 寫（無法向程序包中寫數據，會報錯）
            // StorageFile fileWrite = await Package.Current.InstalledLocation.CreateFileAsync(@"FileSystem\PackageData\readWriteDemo.txt", CreationCollisionOption.ReplaceExisting);
            // await FileIO.WriteTextAsync(fileWrite, "I am webabcd: " + DateTime.Now.ToString());

            // 讀
            // StorageFile fileRead = await Package.Current.InstalledLocation.GetFileAsync(@"FileSystem\PackageData\readWriteDemo.txt");
            StorageFile fileRead = await StorageFile.GetFileFromApplicationUriAsync(new Uri("ms-appx:///FileSystem/PackageData/readWriteDemo.txt", UriKind.Absolute));
            string textContent = await FileIO.ReadTextAsync(fileRead);
            lblMsg.Text = textContent;


            // 引用程序包內的圖片文件並顯示
            img.Source = new Windows.UI.Xaml.Media.Imaging.BitmapImage(new Uri("ms-appx:///Assets/hololens.jpg"));
        }
    }
}

2、演示如何在可移動存儲中對文件進行操作
FileSystem/RemovableDevice/Demo.xaml

<Page
    x:Class="Windows10.FileSystem.RemovableDevice.Demo"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:local="using:Windows10.FileSystem.RemovableDevice"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    mc:Ignorable="d">

    <Grid Background="Transparent">
        <StackPanel Margin="10 0 10 10">

            <TextBlock Name="lblMsg" Margin="5" />

            <ListBox Name="listBox" Width="400" Height="200" HorizontalAlignment="Left" Margin="5" SelectionChanged="listBox_SelectionChanged" />

            <Button Name="btnCopyFile" Content="復制文件到當前選中的設備中" Margin="5" Click="btnCopyFile_Click" />

        </StackPanel>
    </Grid>
</Page>

FileSystem/RemovableDevice/Demo.xaml.cs

/*
 * 演示如何在可移動存儲中對文件進行操作
 */

using System;
using System.Collections.Generic;
using System.Linq;
using Windows.Storage;
using Windows.UI.Xaml;
using Windows.UI.Xaml.Controls;
using Windows.UI.Xaml.Navigation;

namespace Windows10.FileSystem.RemovableDevice
{
    public sealed partial class Demo : Page
    {
        public Demo()
        {
            this.InitializeComponent();
        }

        protected async override void OnNavigatedTo(NavigationEventArgs e)
        {
            // 獲取全部可移動存儲
            StorageFolder removableDevices = await KnownFolders.GetFolderForUserAsync(null, KnownFolderId.RemovableDevices);
            IReadOnlyList<StorageFolder> folderList = await removableDevices.GetFoldersAsync();
            listBox.ItemsSource = folderList.Select(p => p.Name).ToList();

            base.OnNavigatedTo(e);
        }

        private async void listBox_SelectionChanged(object sender, SelectionChangedEventArgs e)
        {
            // 用戶選中的可移動存儲
            string folderName = (string)listBox.SelectedItem;
            StorageFolder removableDevices = await KnownFolders.GetFolderForUserAsync(null, KnownFolderId.RemovableDevices);
            StorageFolder storageFolder = await removableDevices.GetFolderAsync(folderName);

            // 用戶選中的可移動存儲中的根目錄下的文件和文件夾總數
            IReadOnlyList<IStorageItem> storageItems = await storageFolder.GetItemsAsync();
            lblMsg.Text = "items count: " + storageItems.Count;
        }
        
        private async void btnCopyFile_Click(object sender, RoutedEventArgs e)
        {
            // 用戶選中的可移動存儲
            string folderName = (string)listBox.SelectedItem;

            if (folderName != null)
            {
                StorageFolder removableDevices = await KnownFolders.GetFolderForUserAsync(null, KnownFolderId.RemovableDevices);
                StorageFolder storageFolder = await removableDevices.GetFolderAsync(folderName);

                // 復制包內文件到指定的可移動存儲
                StorageFile storageFile = await StorageFile.GetFileFromApplicationUriAsync(new Uri("ms-appx:///Assets/hololens.jpg"));
                try
                {
                    await storageFile.CopyAsync(storageFolder, "hololens.jpg", NameCollisionOption.ReplaceExisting);
                    lblMsg.Text = "復制成功";
                }
                catch (Exception ex)
                {
                    lblMsg.Text = ex.ToString();
                }
            }
        }
    }
}

3、演示如何 添加/刪除 “庫”所包含的文件夾
FileSystem/StorageLibrary/StorageLibraryDemo.xaml

<Page
    x:Class="Windows10.FileSystem.StorageLibrary.StorageLibraryDemo"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:local="using:Windows10.FileSystem.StorageLibrary"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    mc:Ignorable="d">

    <Grid Background="Transparent">

        <StackPanel Margin="10 0 10 10">

            <TextBlock Name="lblMsg" Margin="5" />

            <Button Name="btnAddFolder" Content="增加一個文件夾引用到圖片庫" Click="btnAddFolder_Click" Margin="5" />

            <Button Name="btnRemoveFolder" Content="從圖片庫移除之前添加的全部文件夾引用" Click="btnRemoveFolder_Click" Margin="5" />

        </StackPanel>
    </Grid>
</Page>

FileSystem/StorageLibrary/StorageLibraryDemo.xaml.cs

/*
 * 演示如何 添加/刪除 “庫”所包含的文件夾
 * 
 * StorageLibrary - 用於“庫”管理
 *     GetLibraryForUserAsync(User user, KnownLibraryId libraryId) - 獲取指定用戶的指定“庫”，返回 StorageLibrary 類型的對象
 *         user - 指定用戶，傳 null 則為當前用戶（關於 User 相關請參見 /UserAndAccount/UserInfo.xaml）
 *         libraryId - 指定庫目錄，一個 KnownLibraryId 類型的枚舉值（Music, Pictures, Videos, Documents）
 *     Folders - 當前庫所包含的文件夾們
 *     SaveFolder - 當前庫的默認文件夾
 *     RequestAddFolderAsync() - 添加文件夾到當前庫
 *     RequestRemoveFolderAsync() - 從當前庫移除指定的文件夾
 *     DefinitionChanged -  當前庫所包含的文件夾發生變化時觸發的事件
 *     
 *     
 * 註：根據需要請在 Package.appxmanifest 中配置  <Capability Name="picturesLibrary" />, <Capability Name="videosLibrary" />,  <Capability Name="musicLibrary" />, <Capability Name="documentsLibrary" />
 */

using System;
using System.Collections.Generic;
using Windows.Storage;
using Windows.UI.Xaml;
using Windows.UI.Xaml.Controls;
using Windows.UI.Xaml.Navigation;

namespace Windows10.FileSystem.StorageLibrary
{
    public sealed partial class StorageLibraryDemo : Page
    {
        // 臨時保存添加進圖片庫的文件夾
        private List<StorageFolder> _addedFloders = new List<StorageFolder>();

        public StorageLibraryDemo()
        {
            this.InitializeComponent();
        }

        protected async override void OnNavigatedTo(NavigationEventArgs e)
        {
            // 註意：要想訪問圖片庫，別忘了增加 <Capability Name="picturesLibrary" />

            // 獲取圖片庫的 StorageLibrary 對象
            Windows.Storage.StorageLibrary picturesLibrary = await Windows.Storage.StorageLibrary.GetLibraryForUserAsync(null, KnownLibraryId.Pictures);

            // 當前庫所包含的文件夾增多或減少時
            picturesLibrary.DefinitionChanged += async (Windows.Storage.StorageLibrary innerSender, object innerEvent) =>
            {
                await Dispatcher.RunAsync(Windows.UI.Core.CoreDispatcherPriority.Normal, () =>
                {
                    lblMsg.Text = "圖片庫所包含的文件夾如下：";
                    foreach (StorageFolder folder in picturesLibrary.Folders) // 當前庫所包含的全部文件夾
                    {
                        lblMsg.Text += Environment.NewLine;
                        lblMsg.Text += folder.Path;
                    }
                });
            };

            base.OnNavigatedTo(e);
        }

        // 增加一個文件夾引用到圖片庫
        private async void btnAddFolder_Click(object sender, RoutedEventArgs e)
        {
            Windows.Storage.StorageLibrary picturesLibrary = await Windows.Storage.StorageLibrary.GetLibraryAsync(KnownLibraryId.Pictures);

            // 彈出文件夾選擇器，以選擇需要添加到圖片庫的文件夾
            StorageFolder addedFolder = await picturesLibrary.RequestAddFolderAsync();
            if (addedFolder != null)
            {
                // 添加成功
                _addedFloders.Add(addedFolder);
            }
            else
            {

            }
        }

        // 從圖片庫移除之前添加的全部文件夾引用
        private async void btnRemoveFolder_Click(object sender, RoutedEventArgs e)
        {
            Windows.Storage.StorageLibrary picturesLibrary = await Windows.Storage.StorageLibrary.GetLibraryAsync(KnownLibraryId.Pictures);

            foreach (StorageFolder folder in _addedFloders)
            {
                // 從圖片庫移除指定的文件夾引用
                if (await picturesLibrary.RequestRemoveFolderAsync(folder))
                {
                    // 移除成功
                }
                else
                {

                }
            }
        }
    }
}

OK
[源碼下載]

背水一戰 Windows 10 (90) - 文件系統: 獲取 Package 中的文件, 可移動存儲中的文件操作, “庫”管理