Convert byte[] to file stream without writing to disk

Question

We are getting a input from a web service as a byte[] (which we process internally) and we need to upload to another web service which accepts only a file stream.

How can i to convert byte[] to a file stream without writing to disk in C#?

Edit: This is not duplicate. I am not asking how to convert byte[] to memory stream or file steam. I am asking how to convert byte[] to file stream without writing to disk. Please note that, I need to send the data as file steam to a third party web service, which I do not have access. This web service accepts only as file stream.

So far I have below code:

string fileWritePath = "c:\\temp\\test.docx"; //here fileContent is a byte[] File.WriteAllBytes(fileWritePath, fileContent); FileStream fileStream = new FileStream(fileWritePath, FileMode.Open, FileAccess.Read);

I do not want to write the file to local disk and create file stream.

An external web service accepts a file stream? That doesn't seem to be possible. A file stream is on your disc and the web service is accessible through a network. These are two entirely different things. — Sefe
– Sefe, Commented Dec 21, 2016 at 8:31
I agree with @Sefe .Roughly speaking, a FileStreamis a wrapper on an handle for a resource (a file on the disk usually). this handle has a meaning only locally, on the computer where you create the FileStream. When you pass this object to an external web server, the underlying handle will not have any meaning. — Gian Paolo
– Gian Paolo, Commented Dec 21, 2016 at 8:55
@css How can a web service only except FileStream? How do you access this service? — Magnus
– Magnus, Commented Feb 27, 2019 at 10:51

Keith · Accepted Answer · 2016-12-21 08:41:24Z

5

Use MemoryStream:

using(var stream = new MemoryStream(byteArray)){ SendStreamToService(stream); }

answered Dec 21, 2016 at 8:41

Keith

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Comments

Sefe · Accepted Answer · 2016-12-21 08:37:13Z

0

If you are bound to a file stream, you have to use it. If you don't want to go through a physical hard drive you can install a ram disc on your system that maps parts of the memory to a virtual drive and use this drive to map your FileStream to.

answered Dec 21, 2016 at 8:37

Sefe

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2 Comments

Gian Paolo Over a year ago

see my comment above original post: even if you use a ram disk, I think the FileStream cannot work when you transfer it over a network

Sefe Over a year ago

@GianPaolo: Maybe OP says web service, but means something else.

user23064773 · Accepted Answer · 2023-12-08 09:29:55Z

0

This is enough. try it.

MemoryStream memStream = new MemoryStream(byteArray);

answered Dec 8, 2023 at 9:29

user23064773

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1 Comment

Magnus Over a year ago

Why duplicate an answer that already exist?

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