C# - 在 Windows 7 中为所有用户设置目录权限

Question

这应该是一个相当简单的问题，但由于某种原因我似乎无法让它工作。我想要做的就是设置给定目录的权限以允许所有用户完全访问。这是我到目前为止的代码：

System.IO.DirectoryInfo di = new System.IO.DirectoryInfo(destinationDirectory);
FileSystemAccessRule fsar = new FileSystemAccessRule("Users", FileSystemRights.FullControl, AccessControlType.Allow);
DirectorySecurity ds = null;

    if (!di.Exists)
    {
       System.IO.Directory.CreateDirectory(destinationDirectory);
    }

ds = di.GetAccessControl();
ds.AddAccessRule(fsar);

没有抛出异常，但也没有发生任何事情。当我在代码运行后检查目录权限时，没有看到任何变化。

有什么想法吗？

Answer 1

您还需要调用 SetAccessControl 应用更改。

ds = di.GetAccessControl();
ds.AddAccessRule(fsar);
di.SetAccessControl(ds); // nothing happens until you do this

---

正如所讨论的，MSDN 上的示例似乎非常缺乏细节 此处。我破解了本文中的代码，得到了以下表现良好的代码：

static bool SetAcl()
{
    FileSystemRights Rights = FileSystemRights.FullControl;

    // *** Add Access Rule to the actual directory itself
    FileSystemAccessRule AccessRule = new FileSystemAccessRule("Users", Rights,
                                InheritanceFlags.None,
                                PropagationFlags.NoPropagateInherit,
                                AccessControlType.Allow);

    DirectoryInfo Info = new DirectoryInfo(destinationDirectory);
    DirectorySecurity Security = Info.GetAccessControl(AccessControlSections.Access);

    bool Result;
    Security.ModifyAccessRule(AccessControlModification.Set, AccessRule, out Result);

    if (!Result)
        return false;

    // *** Always allow objects to inherit on a directory
    InheritanceFlags iFlags = InheritanceFlags.ContainerInherit | InheritanceFlags.ObjectInherit;

    // *** Add Access rule for the inheritance
    AccessRule = new FileSystemAccessRule("Users", Rights,
                                iFlags,
                                PropagationFlags.InheritOnly,
                                AccessControlType.Allow);
    
    Security.ModifyAccessRule(AccessControlModification.Add, AccessRule, out Result);

    if (!Result)
        return false;

    Info.SetAccessControl(Security);

    return true;
}

Answer 2

David Heffernan 的答案不适用于非英语计算机，在非英语计算机上尝试设置“用户”权限会失败，并出现 IdentityNotMapped 异常。通过使用 WellKnownSidType.BuiltinUsersSid 代替，以下代码将在任何地方工作：

static void SetFullControlPermissionsToEveryone(string path)
{
    const FileSystemRights rights = FileSystemRights.FullControl;

    var allUsers = new SecurityIdentifier(WellKnownSidType.BuiltinUsersSid, null);

    // Add Access Rule to the actual directory itself
    var accessRule = new FileSystemAccessRule(
        allUsers,
        rights,
        InheritanceFlags.None,
        PropagationFlags.NoPropagateInherit,
        AccessControlType.Allow);

    var info = new DirectoryInfo(path);
    var security = info.GetAccessControl(AccessControlSections.Access);

    bool result;
    security.ModifyAccessRule(AccessControlModification.Set, accessRule, out result);

    if (!result)
    {
        throw new InvalidOperationException("Failed to give full-control permission to all users for path " + path);
    }

    // add inheritance
    var inheritedAccessRule = new FileSystemAccessRule(
        allUsers,
        rights,
        InheritanceFlags.ContainerInherit | InheritanceFlags.ObjectInherit,
        PropagationFlags.InheritOnly,
        AccessControlType.Allow);

    bool inheritedResult;
    security.ModifyAccessRule(AccessControlModification.Add, inheritedAccessRule, out inheritedResult);

    if (!inheritedResult)
    {
        throw new InvalidOperationException("Failed to give full-control permission inheritance to all users for " + path);
    }

    info.SetAccessControl(security);
}