Retrieving actual file size on disk

Question

I am trying to retrieve the acutal size of a file on disk. Similar to what windows does when you right click a file to view its properties and there is a field "Size on disk:". I want to retriev that data. I am not trying to retrieve data through the FileInfo.Length approach. This is the size of the file when it is loaded into memory. I need the size of the file in relation to the drive itself. Can anyone help?

Alan · Answer

There doesn't seem to be an easy way to get at the 'size on disk' but you can work it out using the cluster size and the file length. Please see this thread: http://forums.microsoft.com/MSDN/ShowPost.aspx?PostID=853436&SiteID=1