private static async Task <IEnumerable <DirectoryInfo> > GetDirectoryInfoAsync(
[NotNull] this DirectoryInfo ParentDirectory,
FileSystemRights rights,
CancellationToken Cancel = default)
{
Cancel.ThrowIfCancellationRequested();
if (!ParentDirectory.CanAccessToDirectory(FileSystemRights.ListDirectory))
{
return(Enumerable.Empty <DirectoryInfo>());
}
var dirs = new List <DirectoryInfo>();
DirectoryInfo[] directories;
try
{
directories = await ParentDirectory.Async(dir => dir.GetDirectories(), Cancel).ConfigureAwait(false);
}
catch (UnauthorizedAccessException)
{
return(Enumerable.Empty <DirectoryInfo>());
}
foreach (var dir in directories)
{
if (dir.CanAccessToDirectory(rights))
{
Cancel.ThrowIfCancellationRequested();
dirs.Add(dir);
dirs.AddRange(await dir.GetDirectoryInfoAsync(rights, Cancel).ConfigureAwait(false));
}
}
return(dirs);
}
/// <summary>Получает список всех вложенных директорий на основании прав доступа</summary>
/// <param name="ParentDirectory">родительская директория</param>
/// <param name="rights">право доступа</param>
/// <param name="Cancel">Флаг отмены асинхронной операции</param>
/// <returns></returns>
public static async Task <IEnumerable <DirectoryInfo> > GetAllSubDirectoryAsync(
[NotNull] this DirectoryInfo ParentDirectory,
FileSystemRights rights = FileSystemRights.ListDirectory,
CancellationToken Cancel = default)
{
Cancel.ThrowIfCancellationRequested();
return(!ParentDirectory.CanAccessToDirectory(rights)
? Array.Empty <DirectoryInfo>()
: await ParentDirectory.GetDirectoryInfoAsync(rights, Cancel).ConfigureAwait(false));
}
private static IEnumerable <DirectoryInfo> GetDirectoryInfo(this DirectoryInfo ParentDirectory, FileSystemRights rights)
{
if (!ParentDirectory.CanAccessToDirectory(rights))
{
yield break;
}
foreach (var directory in ParentDirectory.GetDirectories())
{
if (directory.CanAccessToDirectory(rights))
{
yield return(directory);
foreach (var sub_dir in directory.GetDirectoryInfo(rights))
{
yield return(sub_dir);
}
}
}
}
/// <summary> /// Проверяет право просмотреть директорию в списке /// </summary> /// <param name="dir">директория</param> /// <returns></returns> public static bool CanAccessToDirectoryListItems([NotNull] this DirectoryInfo dir) => dir.CanAccessToDirectory(FileSystemRights.ListDirectory);
public static IEnumerable <DirectoryInfo> GetAllSubDirectory([NotNull] this DirectoryInfo ParentDirectory, FileSystemRights rights) =>
ParentDirectory.CanAccessToDirectory(rights)
? ParentDirectory.GetDirectoryInfo(rights)
: Array.Empty <DirectoryInfo>();
/// <summary> /// проверяет право на директорию в соответствии с заданными правами /// </summary> /// <param name="dir">директория</param> /// <param name="AccessRight">искомые права (по умолчанию права на изменение)</param> /// <returns></returns> public static bool CanAccessToDirectory([NotNull] this DirectoryInfo dir, FileSystemRights AccessRight = FileSystemRights.Modify) => dir.CanAccessToDirectory(__CurrentSystemUser, AccessRight);
