C# 在WinRT上复制文件夹

目前，我只知道如何使用以下方法复制文件：

IStorageFolder dir = Windows.Storage.ApplicationData.Current.LocalFolder;

IStorageFile file = await StorageFile.GetFileFromApplicationUriAsync(
    new Uri("ms-appx:///file.txt"));

await file.CopyAsync(dir, "file.txt");

当我试图复制文件夹和其中的所有内容时，我找不到像上面的

copyanc

这样的API

---

是否可以复制WinRT中的文件夹和所有内容？

一种可能是使用

StorageFolder.GetItemsAsync();

从

Windows.Storage

-命名空间

调用的结果是

IReadOnlyList<IStorageItem>

IReadOnlyList

包含当前文件夹的所有文件和文件夹。 然后你就可以做这些了

请参阅以获取进一步参考。

根据答案，我生成自己的副本文件夹：

namespace Directories
{
    private string ROOT = "root";

    public sealed partial class MainPage : Page
    {
        public MainPage()
        {
            this.InitializeComponent();

            CopyFolder(ROOT);
        }

        private async void CopyFolder(string path)
        {
            IStorageFolder destination = Windows.Storage.ApplicationData.Current.LocalFolder;
            IStorageFolder root = Windows.ApplicationModel.Package.Current.InstalledLocation;

            if (path.Equals(ROOT) && !await FolderExistAsync(ROOT))
                await destination.CreateFolderAsync(ROOT);

            destination = await destination.GetFolderAsync(path);
            root = await root.GetFolderAsync(path);

            IReadOnlyList<IStorageItem> items = await root.GetItemsAsync();
            foreach (IStorageItem item in items)
            {
                if (item.GetType() == typeof(StorageFile))
                {
                    IStorageFile presFile = await StorageFile.GetFileFromApplicationUriAsync(
                        new Uri("ms-appx:///" + path.Replace("\\", "/") + "/" + item.Name));

                    // Do copy file to destination folder
                    await presFile.CopyAsync(destination);
                }
                else
                {
                    // If folder doesn't exist, than create new one on destination folder
                    if (!await FolderExistAsync(path + "\\" + item.Name))
                        await destination.CreateFolderAsync(item.Name);

                    // Do recursive copy for every items inside
                    CopyFolder(path + "\\" + item.Name);
                }
            }
        }

        private async Task<bool> FolderExistAsync(string foldername)
        {
            IStorageFolder destination = Windows.Storage.ApplicationData.Current.LocalFolder;

            try
            {
                await destination.GetFolderAsync(foldername);
                return true;
            }
            catch (Exception ex)
            {
                return false;
            }
        }
    }
}

它将从

InstalledLocation

文件夹复制到

LocalFolder

不确定C是否支持Array.map方法，但这是JavaScript的copyFolderAsync代码的外观

CreationCollisionOption = Windows.Storage.CreationCollisionOption;
NameCollisionOption = Windows.Storage.NameCollisionOption;

copyFolderAsync = function(sourceFolder, destFolder) {
  return destFolder.createFolderAsync(sourceFolder.name, CreationCollisionOption.openIfExists).then(function(destSubFolder) {
    return sourceFolder.getFilesAsync().then(function(files) {
      return WinJS.Promise.join(files.map(function(file) {
        return file.copyAsync(destSubFolder, file.name, NameCollisionOption.replaceExisting);
      }));
    }).then(function() {
      return sourceFolder.getFoldersAsync();
    }).then(function(folders) {
      return WinJS.Promise.join(folders.map(function(folder) {
        return copyFolderAsync(folder, destSubFolder);
      }));
    });
  });
};

---

上面的代码并没有让我满意（太具体了），我制作了自己的通用代码，所以我想我可以分享它：

public static async Task CopyFolderAsync(StorageFolder source, StorageFolder destinationContainer, string desiredName = null)
    {
        StorageFolder destinationFolder = null;
            destinationFolder = await destinationContainer.CreateFolderAsync(
                desiredName ?? source.Name, CreationCollisionOption.ReplaceExisting);

        foreach (var file in await source.GetFilesAsync())
        {
            await file.CopyAsync(destinationFolder, file.Name, NameCollisionOption.ReplaceExisting);
        }
        foreach (var folder in await source.GetFoldersAsync())
        {
            await CopyFolderAsync(folder, destinationFolder);
        }
    }

---

您遇到了什么错误？我找不到复制文件夹的API，如上面的复制文件。您遇到了编译器错误或链接器错误吗？没有错误，问题是，我不知道复制文件夹的API是否存在。所以，我试着在这里问我是否错过了什么。如果API真的不存在，那么我必须手动执行，循环所有子文件夹并逐个复制所有文件。明白了。。。据我所知，WinRT正在限制其处理文件/文件夹（沙盒）的能力。谢谢您提供的信息，但在我再次检查后，StorageFolder.GetItemsAsync（）的结果是

IReadOnlyList

。现在，我尝试使用递归实现它，完成后我会更新代码。创建文件夹时，“替换现有文件夹”是删除旧文件夹（及其内容）还是将该现有文件夹用作目标？我想说，现有文件夹被创建的空文件夹替换，因此现有内容丢失。但我还没有测试过诚实。这很有效。此外，我还添加了2条deleteSync（）语句来删除所有文件和文件夹。我想把文件夹从一个路径移到另一个路径。非常紧凑。这里结束的是调用代码，用于从Appx复制到localFolder

Dim localFldr=Await ApplicationData.Current.localFolder.TryGetItemAsync（“localFolder”），如果localFldr为Nothing，则Dim appFldr=Await Windows.ApplicationModel.Package.Current.InstalledLocation.GetFolderAsync（“localFolder”）如果

public static async Task CopyFolderAsync(StorageFolder source, StorageFolder destinationContainer, string desiredName = null)
    {
        StorageFolder destinationFolder = null;
            destinationFolder = await destinationContainer.CreateFolderAsync(
                desiredName ?? source.Name, CreationCollisionOption.ReplaceExisting);

        foreach (var file in await source.GetFilesAsync())
        {
            await file.CopyAsync(destinationFolder, file.Name, NameCollisionOption.ReplaceExisting);
        }
        foreach (var folder in await source.GetFoldersAsync())
        {
            await CopyFolderAsync(folder, destinationFolder);
        }
    }