C# - 为Windows 7中的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,我似乎无法让这个工作.我想要做的就是在给定目录上设置权限,以允许对所有用户的完全访问权限.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);

没有异常被抛出,但也没有任何反应.在代码运行后检查目录权限时,我看不到任何更改.

有任何想法吗？

先谢谢,
桑尼

Answer 1

您还需要调用SetAccessControl以应用更改.

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

似乎MSDN上的例子非常缺乏细节,正如这里所讨论的那样.我破解了本文中的代码以获得以下表现良好的代码:

static bool SetAcl()
{
    FileSystemRights Rights = (FileSystemRights)0;
    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 = false;
    Security.ModifyAccessRule(AccessControlModification.Set, AccessRule, out Result);

    if (!Result)
        return false;

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

    // *** Add Access rule for the inheritance
    AccessRule = new FileSystemAccessRule("Users", Rights,
                                iFlags,
                                PropagationFlags.InheritOnly,
                                AccessControlType.Allow);
    Result = false;
    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机器,其中尝试设置"用户"的权限失败并出现IdentityNotMapped异常.以下代码可以在任何地方使用,WellKnownSidType.BuiltinUsersSid而不是:

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);
}