ASP.Net file upload/browser component

I might end up having to build this, but it would be nice if there is a solution already...

I need to add functional开发者_JAVA百科ity to a client's web page to allow them to upload files, and then to view and download them. We also need some form of authentication mechanism to restrict who has access to which files. I have used Neat Upload in the past and have found that it works pretty well, but it only handles upload. If there is a control that does everything, that would be pretty nice. Has anyone seen or used anything like that? I am working in ASP.Net. Our server is IIS 6, but I cannot confirm which version of IIS the client is using.

I did some more searching, and found this. I think it will fit our needs perfectly

edit: The link didn't come through. The solution is FileVista, at http://www.gleamtech.com/products/filevista/web-file-manager

I would recommend using Neat Upload or some other upload component and integrating ASP.NET membership services to manage permissions.