Determining file extension given a FileStream
Solution 1
string extension = Path.GetExtension(myFileStream.Name);
Solution 2
If the stream is really a FileStream
then you should be able to do the following
var ext = Path.GetExtension(fileStream.Name);
If it's a plain old Stream
though then it's not generally possible to get the extension because a Stream
can be created for any stream of bytes. It doesn't have to have a backing file.
Update
As Chris pointed out in the comments there is another SO question which is relevant to this discussion. It's discussing heuristics for determining type of a byte[]
which can then be mapped to a probable original signature.
It's by no means foolproof but may be helpful to you.
Solution 3
Yes, using the file name the following will return .txt
(including the .
):
var path = myFileStream.Name;
return Path.GetExtension(path);
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Abdul Samad
Updated on January 19, 2020Comments
-
Abdul Samad over 4 years
Is there any way to know the type of the
FileStream
. I have a function that takes aFileStream
object and I want to determine the file extension based on thatFileStream
.