Array

[Aleksey]

Hi All!

Does anybody know how can I change length of existing array. In Delphi I
used dynamic array and procedure SetLength. Is any similar procedure in C#.
For instance, I have array with 100 elements, and I need change its lenght
to 20 without lost data in it.

Thanks a lot

[Mattias Sjögren]

Re: Array

>Does anybody know how can I change length of existing array. In Delphi I[color=blue]
>used dynamic array and procedure SetLength. Is any similar procedure in C#.
>For instance, I have array with 100 elements, and I need change its lenght
>to 20 without lost data in it.[/color]

You can't change the length of an array in C#. You may want to use an
ArrayList instead.



Mattias

--
Mattias Sjögren [MVP] mattias @ mvps.org
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[David Anton]

RE: Array

There is an equivalent - i.e., similar code to what VB is doing behind the
scenes and similar performance (produced with our Instant C# VB to C#
converter):
e.g.,
VB:
Dim YourArray() As Integer
....
ReDim Preserve YourArray(i)

C#:
int[] YourArray;
....
int[] temp = new int[i + 1];
if (YourArray != null)
Array.Copy(Your Array, temp, Math.Min(YourAr ray.Length, temp.Length));
YourArray = temp;

As the other poster said, ArrayList will very often be a better solution,
but at least you have the equivalent now.

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"Aleksey" wrote:
[color=blue]
> Hi All!
>
> Does anybody know how can I change length of existing array. In Delphi I
> used dynamic array and procedure SetLength. Is any similar procedure in C#.
> For instance, I have array with 100 elements, and I need change its lenght
> to 20 without lost data in it.
>
> Thanks a lot
>
>
>[/color]

[Chad Z. Hower aka Kudzu]

Re: Array

"Aleksey" <alexey.timonin @il.quest.com> wrote in
news:ukPrD2siFH A.1204@TK2MSFTN GP12.phx.gbl:[color=blue]
> Does anybody know how can I change length of existing array. In Delphi
> I used dynamic array and procedure SetLength. Is any similar procedure
> in C#. For instance, I have array with 100 elements, and I need change
> its lenght to 20 without lost data in it.[/color]

Be careful if using this in Delphi.NET. It supports it for compatibility, but it actually creates a new
array and copies the old one into it on .NET.


--
Chad Z. Hower (a.k.a. Kudzu) - http://www.hower.org/Kudzu/
"Programmin g is an art form that fights back"

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