Question

.NET for Windows Store应用程序不提供

System.IO.CreateDirectory()。

如何实现此等效方法？ StorageFolder.CreateFolderAsync()在当前文件夹中创建一个子文件夹，但在我的情况下，我有一个类似的路径，需要创建此路径中不存在的所有文件夹。

该路径位于应用程序在Windows中的沙箱中。

Answer 1

没有API与System.IO.CreateDirectory()的行为完全相同，所以我使用Windows.Storage类实现了它：

    // Any and all directories specified in path are created, unless they already exist or unless 
    // some part of path is invalid. If the directory already exists, this method does not create a 
    // new directory.
    // The path parameter specifies a directory path, not a file path, and it must in 
    // the ApplicationData domain.
    // Trailing spaces are removed from the end of the path parameter before creating the directory.
    public static void CreateDirectory(string path)
    {
         path = path.Replace('/', '\\').TrimEnd('\\');
        StorageFolder folder = null;

        foreach(var f in new StorageFolder[] {
            ApplicationData.Current.LocalFolder, 
            ApplicationData.Current.RoamingFolder, 
            ApplicationData.Current.TemporaryFolder } )
        {
            string p = ParsePath(path, f);
            if (f != null)
            {
                path = p;
                folder = f;
                break;
            }
        }

        if(path == null)
            throw new NotSupportedException("This method implementation doesn't support " +
            "parameters outside paths accessible by ApplicationData.");

        string[] folderNames = path.Split('\\');
        for (int i = 0; i < folderNames.Length; i++)
        {
            var task = folder.CreateFolderAsync(folderNames[i], CreationCollisionOption.OpenIfExists).AsTask();
            task.Wait();
            if (task.Exception != null)
                throw task.Exception;
            folder = task.Result;
        }
    }

    private static string ParsePath(string path, StorageFolder folder)
    {
        if (path.Contains(folder.Path))
            {
                path = path.Substring(path.LastIndexOf(folder.Path) + folder.Path.Length + 1);
                return path;
            }
        return null;
    }

Answer 2

要在Windows应用商店应用的应用程序沙箱中创建文件夹，您必须在app-manifest中添加文档库以及文件权限。

有关库和文档的更详细说明，请参阅this博客

如何使用Windows.Storage API创建路径？

2 个答案: