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cropping a byte array?

I have a byte array buffer that is of a static size.

byte[] buffer = new byte[512];

Data is being read into it using NetworkStream.Read

int countBytes = netStream.Read(buffer, 0, buffer.Length);

For my applicaion, I need to output exactly the number of bytes that were
read in, not the entire buffer. Basically, I need to know how to do
something like this (I know this won't work).

byte[] output = buffer.subString(0, countBytes);

How do I create a new byte array of the correct length?

Thanks in advance,
Will.
Nov 15 '05 #1
4 7661
Will,
byte[] output = buffer.subString(0, countBytes);

How do I create a new byte array of the correct length?

byte[] output = new byte[countBytes];
Buffer.BlockCopy(buffer, 0, output, 0, countBytes);

Mattias

--
Mattias Sjögren [MVP] mattias @ mvps.org
http://www.msjogren.net/dotnet/ | http://www.dotnetinterop.com
Please reply only to the newsgroup.
Nov 15 '05 #2
Hi Will,

See Array,Copy

--
Miha Markic - RightHand .NET consulting & development
miha at rthand com
www.rthand.com

"Will" <de*@rusmo.com> wrote in message
news:bd********************@giganews.com...
I have a byte array buffer that is of a static size.

byte[] buffer = new byte[512];

Data is being read into it using NetworkStream.Read

int countBytes = netStream.Read(buffer, 0, buffer.Length);

For my applicaion, I need to output exactly the number of bytes that were
read in, not the entire buffer. Basically, I need to know how to do
something like this (I know this won't work).

byte[] output = buffer.subString(0, countBytes);

How do I create a new byte array of the correct length?

Thanks in advance,
Will.

Nov 15 '05 #3
Thanks!

I wasn't aware C# allowed you to instantiate an array with a variable as the
array size.
I'm pretty sure...

int y = 50;
int[] x = new int[y];

....wouldn't compile in C++.
Nov 15 '05 #4
I'm pretty sure...

int y = 50;
int[] x = new int[y];

...wouldn't compile in C++.


If you correct the syntax it would certainly work

int x[] = new int[y];

Mattias

--
Mattias Sjögren [MVP] mattias @ mvps.org
http://www.msjogren.net/dotnet/ | http://www.dotnetinterop.com
Please reply only to the newsgroup.
Nov 15 '05 #5

This thread has been closed and replies have been disabled. Please start a new discussion.

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