Can I convert a Stream object to a FileInfo object?

Question

For the ExcelPackage constructor you need a FileInfo object. I rather use some kind of stream object(f.i. MemoryStream), because I don't need to save the file to the server itself, but expose it as a FileStream anyway to the user. I don't want to make files which I have to delete lateron from servers which are only there for generating purposes and never used again. Apart from that, otherwise I need also the necessary rights for the application/user on the directory/file on the server.

So my question is then: How can I convert a stream object to a FileInfo object.

Answer 1

Yes you can

var excelPackage = new ExcelPackage();
excelPackage.Load(fileStream);

Answer 2

You can't convert the Stream as such to a FileInfo; they represent entirely different things. A Stream contains data thay may or may not represent a file on disk. A FileInfo on the other hand contains metadata about a file, that may or may not exist.

What you can do is to write the contents of the Stream to a file on disk, create a FileInfo pointing at that file and pass that FileInfo to the constructor.

Answer 3

A FileInfo class is a simple wrapper around a path to a file on disk.
It is not possible to have a FileInfo wrap a memory stream.

However, you can download the source code and add a constructor that takes a Stream. (The file path is only used in the WriteDebugFile method)