Copying data between byte arrays

[Vitaly Zayko]

It's probably simple but I can't find a way how to copy number of bytes
from one byte array to another? Just like Array.Copy(Sour ceArray,
SourceIndex, DestArray, DestIndex, Length) does but in my case the
arrays have different length. Of course I can copy byte by byte but I
guess there should be a function for such task.
Thanks!

--
Vit Zayko

[Rainer Queck]

Re: Copying data between byte arrays

Hi Vitaly,

take a look at "Buffer.BlockCo py"

Rainer

[Kevin Spencer]

Re: Copying data between byte arrays

Using the same overload you've specified, it doesn't matter how long each
array is, as long as "DestArray" is at least "Length" in length, and the
difference between DestArray.Lengt h and DestIndex is at least as long as
"Length."

--
HTH,

Kevin Spencer
Microsoft MVP
..Net Developer
You can lead a fish to a bicycle,
but you can't make it stink.

"Vitaly Zayko" <vitaly_at_zayk o_dot_net> wrote in message
news:uZDFFoy$FH A.4080@TK2MSFTN GP14.phx.gbl...[color=blue]
> It's probably simple but I can't find a way how to copy number of bytes
> from one byte array to another? Just like Array.Copy(Sour ceArray,
> SourceIndex, DestArray, DestIndex, Length) does but in my case the arrays
> have different length. Of course I can copy byte by byte but I guess there
> should be a function for such task.
> Thanks!
>
> --
> Vit Zayko[/color]

[Vitaly Zayko]

Re: Copying data between byte arrays

That's it! Thank you Rainer!
[color=blue]
> Hi Vitaly,
>
> take a look at "Buffer.BlockCo py"
>
> Rainer
>
>[/color]


--
Vit Zayko

[Marc Gravell]

Re: Copying data between byte arrays

The length of the arrays should not cause any problems to Array.Copy; e.g.
the following copies the second 50 bytes of a 100 byte array into (roughly)
the middle of a 500 byte arraym then prints some of the contents to validate
this.

byte[] source = new byte[100];
for (int i = 0; i < 100; i++)
source[i] = (byte) i;
byte[] dest = new byte[500];
Array.Copy(sour ce, 50, dest, 200, 50); // source array, source
start-offset, destination array, destination start-offset, items to copy
for (int i = 195; i < 255; i++)
Console.WriteLi ne("{0}: {1}", i, dest[i]);

If you are going to copy the entire source array, source.CopyTo(d est,offset)
is an easier option - again, it doesn't need the arrays to be the same size,
as long as there is sufficient space in the destination.

Did I miss something in your question?

Marc

"Vitaly Zayko" <vitaly_at_zayk o_dot_net> wrote in message
news:uZDFFoy$FH A.4080@TK2MSFTN GP14.phx.gbl...[color=blue]
> It's probably simple but I can't find a way how to copy number of bytes
> from one byte array to another? Just like Array.Copy(Sour ceArray,
> SourceIndex, DestArray, DestIndex, Length) does but in my case the arrays
> have different length. Of course I can copy byte by byte but I guess there
> should be a function for such task.
> Thanks!
>
> --
> Vit Zayko[/color]

[Vitaly Zayko]

Re: Copying data between byte arrays

Well, my question wasn't complete, I'm sorry:
actually source array is string type, and I tried to use
String.ToCharAr ray(). Destination is byte array. When I tried to use
Copy I've got ArrayTypeMismat chException. That's why it didn't work
using Copy and it did using Buffer.BlockCop y.
Thanks to everyone!
Vit

[Jon Skeet [C# MVP]]

Re: Copying data between byte arrays

<Vitaly Zayko <"vitaly at zayko dot net">> wrote:[color=blue]
> Well, my question wasn't complete, I'm sorry:
> actually source array is string type, and I tried to use
> String.ToCharAr ray(). Destination is byte array. When I tried to use
> Copy I've got ArrayTypeMismat chException. That's why it didn't work
> using Copy and it did using Buffer.BlockCop y.[/color]

Hmm... that sounds like really you want Encoding.GetByt es() for the
appropriate encoding...

--
Jon Skeet - <skeet@pobox.co m>
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If replying to the group, please do not mail me too