从字节数组或流中获取文件名

Question

Is it possible to get filename from the byte array or stream? I wont to save the file. I just want to retrieve its name.

Answer 1

If the Stream is actually a FileStream , then this may be available by casting to FileStream and accessing the .Name property:

Stream stream = ...
FileStream fs = stream as FileStream;
if(fs != null) Console.WriteLine(fs.Name);

However, in the general case : no, this is not available. A byte[] certainly has no concept of a filename, nor do most other types of streams. Likewise, a FileStream base-stream that is being wrapped by other streams (compression, encryption, buffering, etc) will not expose such information, despite the underlying stream (several layers down) being a file.

I would handle the filename separately.

Answer 2

No this isn't possible (ok so it might be possible on the FileStream class, learn something new everyday!).

A byte array or stream represents the content of the file, not the Windows metadata about the file.

There are plenty of straightfoward ways to retain this information, but not knowing any more about your situation I can't offer a solution.

Answer 3

All file information (such as name, extension etc.) is part of meta data for an actual file. The byte array will only hold the actual data. It may be possible if the byte array itself holds meta data (example an xml file)... however, you'd need to know the type and specifically where to look.

Answer 4

You will not able to get filename from byte array. Instead you need filestream to get the name of the file. Byte array does not store name.