C# Can'；不要列出一些文件夹

当我尝试列出电脑上的一些文件夹（如“c:\Documents and Settings”）时，出现“拒绝访问”异常。我的应用程序正在从管理员帐户运行，并具有提升的权限（

）

---

我还需要做些什么才能访问这些文件夹？

以管理员身份运行是必要的，但还不够，您还需要启用权限，如此处所示：

%SystemDrive%\Documents and Settings目录现在存储在%SystemDrive%\Users目录中 […]备份应用程序必须能够备份和恢复 连接点

下面是一个有效的例子：

using (Privilege p = new Privilege(Privilege.Backup))
{
    foreach (string path in Directory.GetFileSystemEntries(@"c:\documents and settings"))
    {
        Console.WriteLine(path);
    }
}

注意，据我所知，没有公共.NET类以编程方式启用特权，但System.Security.AccessControl（mscorlib）中有一个内部类，我已使用精简包装器公开了它。它基于完全公开的窗口

//
///定义Windows权限。
/// 
公共密封类权限：IDisposable
{
私有静态类型_privilegeType；
私有对象特权；
静态特权（）
{
_privilegeType=typeof（string.Assembly.GetType（“System.Security.AccessControl.Privilege”，false）；//mscorlib
}
/// 
///初始化类的新实例并启用特权。
/// 
///特权名称。
公共特权（字符串名称）
：此（名称，true）
{
}
/// 
///初始化类的新实例。
/// 
///特权名称。
///如果设置为true，则启用特权。
公共权限（字符串名称，bool enable）
{
if（name==null）
抛出新的ArgumentNullException（“名称”）；
if（_privilegeType==null）
抛出新的NotSupportedException（）；
_privilege=\u privilegegetype.GetConstructors（）[0]。调用（新对象[]{name}）；
如果（启用）
{
启用（）；
}
}
/// 
///从当前线程禁用此权限。
/// 
公屋
{
_privilegeType.InvokeMember（“Revert”，BindingFlags.Public | BindingFlags.Instance | BindingFlags.InvokeMethod，null，_privilege，null）；
}
/// 
///获取一个值，该值指示是否必须调用Revert。
/// 
/// 
///如果必须调用Revert，则为true；否则为false。
/// 
公共学校需要移交
{
得到
{
return（bool）_privilegeType.InvokeMember（“NeedToRevert”，BindingFlags.Public | BindingFlags.Instance | BindingFlags.GetProperty，null，_privilege，null）；
}
}
/// 
///对当前线程启用此权限。
/// 
公共作废启用（）
{
_privilegeType.InvokeMember（“Enable”，BindingFlags.Public | BindingFlags.Instance | BindingFlags.InvokeMethod，null，_privilege，null）；
}
/// 
///执行与释放、释放或重置非托管资源相关的应用程序定义的任务。
/// 
公共空间处置（）
{
如果（需要转换）
{
回复（）；
}
}
/// 
///SE_ASSIGNPRIMARYTOKEN_名称特权。
/// 
public const string AssignPrimaryToken=“SeAssignPrimaryTokenPrivilege”；
/// 
///SE_AUDIT_NAME权限。
/// 
public const string Audit=“SeAuditPrivilege”；
/// 
///SE_BACKUP_NAME特权。
/// 
public const string Backup=“SeBackupPrivilege”；
/// 
///SE_CHANGE_NOTIFY_NAME权限。
/// 
public const string ChangeNotify=“SeChangeNotifyPrivilege”；
/// 
///SE_创建_全局_名称权限。
/// 
public const string CreateGlobal=“SeCreateGlobalPrivilege”；
/// 
///SE_CREATE_PAGEFILE_NAME权限。
/// 
public const string CreatePageFile=“SeCreatePagefilePrivilege”；
/// 
///SE_创建_永久名称权限。
/// 
public const string CreatePermanent=“SeCreatePermanentPrivilege”；
/// 
///SE_CREATE_SYMBOLIC_LINK_NAME权限。
/// 
public const string CreateSymbolicLink=“secreateSymbolicClinkPrivilege”；
/// 
///SE_CREATE_TOKEN_NAME权限。
/// 
public const string CreateToken=“SeCreateTokenPrivilege”；
/// 
///SE_DEBUG_NAME权限。
/// 
public const string Debug=“SeDebugPrivilege”；
/// 
///SE_ENABLE_DELEGATION_NAME权限。
/// 
public const string EnableDelegation=“SeEnableDelegationPrivilege”；
/// 
///SE_模拟_名称权限。
/// 
public const string Impersonate=“SeImpersonatePrivilege”；
/// 
///SE_INC_BASE_PRIORITY_NAME特权。
/// 
public const string IncreaseBasePriority=“SeIncreaseBasePriorityPrivilege”；
/// 
///SE_增加_配额_名称权限。
/// 
public const string IncreaseQuota=“SeIncreaseQuotaPrivilege”；
/// 
///SE_INC_WORKING_SET_NAME特权。
/// 
public const string IncreaseWorkingSet=“SeIncreaseWorkingSetPrivilege”；
/// 
///SE_LOAD_DRIVER_NAME权限。
/// 
public const string LoadDriver=“SeLoadDriverPrivilege”；
/// 
///SE_LOCK_MEMORY_NAME特权。
/// 
public const string LockMemory=“SeLockMemoryPrivilege”；
/// 
///SE_MACHINE_ACCOUNT_NAME权限。
/// 
public const string MachineAccount=“SeMachineAccountPrivilege”；
/// 
///SE_MANAGE_VOLUME_NAME权限。
/// 
public const string ManageVolume=“SeManageVolumePrivilege”；
/// 
///SE_PROF_SINGLE_PROCESS_NAME权限。
/// 
public const string ProfileSingleProcess=“SeProfileSingleProcessPrivilege”；
/// 
///SE_RELABEL_NAME特权。
/// 
public const string Relabel=“SeRelabelPrivilege”；
/// 
///SE_远程\u关机\u名称权限。
/// 
public const string RemoteShutdown=“SeRemoteShutdownPrivilege”；
/////
/// <summary>
/// Defines a Windows privilege.
/// </summary>
public sealed class Privilege : IDisposable
{
    private static Type _privilegeType;
    private object _privilege;

    static Privilege()
    {
        _privilegeType = typeof(string).Assembly.GetType("System.Security.AccessControl.Privilege", false); // mscorlib
    }

    /// <summary>
    /// Initializes a new instance of the <see cref="Privilege"/> class and enable the privilege.
    /// </summary>
    /// <param name="name">The privilege name.</param>
    public Privilege(string name)
        : this(name, true)
    {
    }

    /// <summary>
    /// Initializes a new instance of the <see cref="Privilege" /> class.
    /// </summary>
    /// <param name="name">The privilege name.</param>
    /// <param name="enable">if set to <c>true</c> the privilege is enabled.</param>
    public Privilege(string name, bool enable)
    {
        if (name == null)
            throw new ArgumentNullException("name");

        if (_privilegeType == null)
            throw new NotSupportedException();

        _privilege = _privilegeType.GetConstructors()[0].Invoke(new object[] { name });
        if (enable)
        {
            Enable();
        }
    }

    /// <summary>
    /// Disable this privilege from the current thread. 
    /// </summary>
    public void Revert()
    {
        _privilegeType.InvokeMember("Revert", BindingFlags.Public | BindingFlags.Instance | BindingFlags.InvokeMethod, null, _privilege, null);
    }

    /// <summary>
    /// Gets a value indicating whether Revert must be called.
    /// </summary>
    /// <value>
    ///   <c>true</c> if Revert must be called; otherwise, <c>false</c>.
    /// </value>
    public bool NeedToRevert
    {
        get
        {
            return (bool)_privilegeType.InvokeMember("NeedToRevert", BindingFlags.Public | BindingFlags.Instance | BindingFlags.GetProperty, null, _privilege, null);
        }
    }

    /// <summary>
    /// Enables this privilege to the current thread. 
    /// </summary>
    public void Enable()
    {
        _privilegeType.InvokeMember("Enable", BindingFlags.Public | BindingFlags.Instance | BindingFlags.InvokeMethod, null, _privilege, null);
    }

    /// <summary>
    /// Performs application-defined tasks associated with freeing, releasing, or resetting unmanaged resources.
    /// </summary>
    public void Dispose()
    {
        if (NeedToRevert)
        {
            Revert();
        }
    }

    /// <summary>
    /// The SE_ASSIGNPRIMARYTOKEN_NAME privilege.
    /// </summary>
    public const string AssignPrimaryToken = "SeAssignPrimaryTokenPrivilege";

    /// <summary>
    /// The SE_AUDIT_NAME privilege.
    /// </summary>
    public const string Audit = "SeAuditPrivilege";

    /// <summary>
    /// The SE_BACKUP_NAME privilege.
    /// </summary>
    public const string Backup = "SeBackupPrivilege";

    /// <summary>
    /// The SE_CHANGE_NOTIFY_NAME privilege.
    /// </summary>
    public const string ChangeNotify = "SeChangeNotifyPrivilege";

    /// <summary>
    /// The SE_CREATE_GLOBAL_NAME privilege.
    /// </summary>
    public const string CreateGlobal = "SeCreateGlobalPrivilege";

    /// <summary>
    /// The SE_CREATE_PAGEFILE_NAME privilege.
    /// </summary>
    public const string CreatePageFile = "SeCreatePagefilePrivilege";

    /// <summary>
    /// The SE_CREATE_PERMANENT_NAME privilege.
    /// </summary>
    public const string CreatePermanent = "SeCreatePermanentPrivilege";

    /// <summary>
    /// The SE_CREATE_SYMBOLIC_LINK_NAME privilege.
    /// </summary>
    public const string CreateSymbolicLink = "SeCreateSymbolicLinkPrivilege";

    /// <summary>
    /// The SE_CREATE_TOKEN_NAME privilege.
    /// </summary>
    public const string CreateToken = "SeCreateTokenPrivilege";

    /// <summary>
    /// The SE_DEBUG_NAME privilege.
    /// </summary>
    public const string Debug = "SeDebugPrivilege";

    /// <summary>
    /// The SE_ENABLE_DELEGATION_NAME privilege.
    /// </summary>
    public const string EnableDelegation = "SeEnableDelegationPrivilege";

    /// <summary>
    /// The SE_IMPERSONATE_NAME privilege.
    /// </summary>
    public const string Impersonate = "SeImpersonatePrivilege";

    /// <summary>
    /// The SE_INC_BASE_PRIORITY_NAME privilege.
    /// </summary>
    public const string IncreaseBasePriority = "SeIncreaseBasePriorityPrivilege";

    /// <summary>
    /// The SE_INCREASE_QUOTA_NAME privilege.
    /// </summary>
    public const string IncreaseQuota = "SeIncreaseQuotaPrivilege";

    /// <summary>
    /// The SE_INC_WORKING_SET_NAME privilege.
    /// </summary>
    public const string IncreaseWorkingSet = "SeIncreaseWorkingSetPrivilege";

    /// <summary>
    /// The SE_LOAD_DRIVER_NAME privilege.
    /// </summary>
    public const string LoadDriver = "SeLoadDriverPrivilege";

    /// <summary>
    /// The SE_LOCK_MEMORY_NAME privilege.
    /// </summary>
    public const string LockMemory = "SeLockMemoryPrivilege";

    /// <summary>
    /// The SE_MACHINE_ACCOUNT_NAME privilege.
    /// </summary>
    public const string MachineAccount = "SeMachineAccountPrivilege";

    /// <summary>
    /// The SE_MANAGE_VOLUME_NAME privilege.
    /// </summary>
    public const string ManageVolume = "SeManageVolumePrivilege";

    /// <summary>
    /// The SE_PROF_SINGLE_PROCESS_NAME privilege.
    /// </summary>
    public const string ProfileSingleProcess = "SeProfileSingleProcessPrivilege";

    /// <summary>
    /// The SE_RELABEL_NAME privilege.
    /// </summary>
    public const string Relabel = "SeRelabelPrivilege";

    /// <summary>
    /// The SE_REMOTE_SHUTDOWN_NAME privilege.
    /// </summary>
    public const string RemoteShutdown = "SeRemoteShutdownPrivilege";

    ///// <summary>
    ///// The SE_RESERVE_PROCESSOR_NAME privilege.
    ///// </summary>
    //public const string ReserveProcessor = "SeReserveProcessorPrivilege";

    /// <summary>
    /// The SE_RESTORE_NAME privilege.
    /// </summary>
    public const string Restore = "SeRestorePrivilege";

    /// <summary>
    /// The SE_SECURITY_NAME privilege.
    /// </summary>
    public const string Security = "SeSecurityPrivilege";

    /// <summary>
    /// The SE_SHUTDOWN_NAME privilege.
    /// </summary>
    public const string Shutdown = "SeShutdownPrivilege";

    /// <summary>
    /// The SE_SYNC_AGENT_NAME privilege.
    /// </summary>
    public const string SyncAgent = "SeSyncAgentPrivilege";

    /// <summary>
    /// The SE_SYSTEM_ENVIRONMENT_NAME privilege.
    /// </summary>
    public const string SystemEnvironment = "SeSystemEnvironmentPrivilege";

    /// <summary>
    /// The SE_SYSTEM_PROFILE_NAME privilege.
    /// </summary>
    public const string SystemProfile = "SeSystemProfilePrivilege";

    /// <summary>
    /// The SE_SYSTEMTIME_NAME privilege.
    /// </summary>
    public const string SystemTime = "SeSystemtimePrivilege";

    /// <summary>
    /// The SE_TAKE_OWNERSHIP_NAME privilege.
    /// </summary>
    public const string TakeOwnership = "SeTakeOwnershipPrivilege";

    /// <summary>
    /// The SE_TCB_NAME privilege.
    /// </summary>
    public const string TrustedComputingBase = "SeTcbPrivilege";

    /// <summary>
    /// The SE_TIME_ZONE_NAME privilege.
    /// </summary>
    public const string TimeZone = "SeTimeZonePrivilege";

    /// <summary>
    /// The SE_TRUSTED_CREDMAN_ACCESS_NAME privilege.
    /// </summary>
    public const string TrustedCredentialManagerAccess = "SeTrustedCredManAccessPrivilege";

    /// <summary>
    /// The SE_UNDOCK_NAME privilege.
    /// </summary>
    public const string Undock = "SeUndockPrivilege";

    /// <summary>
    /// The SE_UNSOLICITED_INPUT_NAME privilege.
    /// </summary>
    public const string UnsolicitedInput = "SeUnsolicitedInputPrivilege";
}