BinaryWriter, don't close stream

[Peter Morris]

Can I use a BinaryWriter without it closing the underlying stream?

I want to save information to a MemoryStream using a BinaryWriter but I want
to dispose of the BinaryWriter and keep the MemoryStream in case I wish to
reload information from the MemoryStream using BinaryReader.


Thanks

Pete

[Nicholas Paldino [.NET/C# MVP]]

Peter,

No, you can't, but you can get the contents of the MemoryStream before
the BinaryWriter is finished by calling ToArray on the MemoryStream. You
can then pass this to a new MemoryStream when you want to use it in a
BinaryReader again.
--
- Nicholas Paldino [.NET/C# MVP]
- mv*@spam.guard. caspershouse.co m

"Peter Morris" <su*****@NOdroo pySPAMeyes.comw rote in message
news:%2******** *******@TK2MSFT NGP06.phx.gbl.. .

Can I use a BinaryWriter without it closing the underlying stream?

I want to save information to a MemoryStream using a BinaryWriter but I
want to dispose of the BinaryWriter and keep the MemoryStream in case I
wish to reload information from the MemoryStream using BinaryReader.


Thanks

Pete

[Ignacio Machin \( .NET/ C# MVP \)]

Hi,

did you try it?

IIRC Close close the underlined stream. but as you are using a MemoryStream,
well "closing" it has not too much sense.

I would give it a try and post back if you have any problem.

--
Ignacio Machin
http://www.laceupsolutions.com
Mobile & warehouse Solutions.
"Peter Morris" <su*****@NOdroo pySPAMeyes.comw rote in message
news:%2******** *******@TK2MSFT NGP06.phx.gbl.. .

Can I use a BinaryWriter without it closing the underlying stream?

I want to save information to a MemoryStream using a BinaryWriter but I
want to dispose of the BinaryWriter and keep the MemoryStream in case I
wish to reload information from the MemoryStream using BinaryReader.


Thanks

Pete

[Mattias Sjögren]

>Can I use a BinaryWriter without it closing the underlying stream?

I want to save information to a MemoryStream using a BinaryWriter but I want
to dispose of the BinaryWriter and keep the MemoryStream in case I wish to
reload information from the MemoryStream using BinaryReader.

What I've done in the past is to create a proxy Stream class that does
nothing in its Close method, and just forwards all other method calls
to the stream it wraps. Then use it something like

new BinaryWriter(ne w NonClosingStrea m(yourActualStr eam))
Mattias

--
Mattias Sjögren [C# MVP] mattias @ mvps.org
http://www.msjogren.net/dotnet/ | http://www.dotnetinterop.com
Please reply only to the newsgroup.

[Marc Gravell]

Jon provides such a stream in his "misc utils" library:

http://www.yoda.arachsys.com/csharp/miscutil/

It might not appear on the write-up, but I'm pretty sure it is
there... NonClosingStrea m or some-such; essentially acts as a
"decorator" for a stream and ignores Close() and Dispose() [it might
call Flush() instead, I can't recall]

Marc

[Marc Gravell]

http://.../miscutil/

Alternative url: http://www.pobox.com/~skeet/csharp/miscutil/

[Jon Skeet [C# MVP]]

Marc Gravell <ma**********@g mail.comwrote:

http://.../miscutil/

Alternative url: http://www.pobox.com/~skeet/csharp/miscutil/

And yes, it's there. (I nearly posted about it myself, but thought I
might as well let you. After all, you seem to know MiscUtil better than
I do half the time!)

NonClosingStrea mWrapper is the type in question. I'll put it on the
list some time :)

--
Jon Skeet - <sk***@pobox.co m>
http://www.pobox.com/~skeet Blog: http://www.msmvps.com/jon.skeet
If replying to the group, please do not mail me too

[Peter Morris]

My problem is that I want a MyClass.SaveToS tream

but as the stream is passed to me I have no (right) to close it. This is
because I have no knowledge of what the application wants to do with the
stream. For example, the app might save 4 objects to the same stream but
the first object will close the stream. It's a bit silly really isn't it
:-) Anyway, I just changed it to

SaveToStream(Bi naryWriter writer);

Pete