How to redim an arry ?

[Gilles Nambert]

Hi,

I come form VB and i'm used to Redim statement to modifiy the size of an
arry dunamically, keeping his content, and i dont't find how to do this
simple operation in C# ?

Thanks and best regards
Gilles
*** Sent via Developersdex http://www.developersdex.com ***
Don't just participate in USENET...get rewarded for it!

[Rakesh Rajan]

Hi Gilles,

Just do a reinitialization.

Eg:
int[] myArray = new int[5];
myArray = new int[7];
HTH,
Rakesh Rajan

"Gilles Nambert" wrote:

Hi,

I come form VB and i'm used to Redim statement to modifiy the size of an
arry dunamically, keeping his content, and i dont't find how to do this
simple operation in C# ?

Thanks and best regards
Gilles
*** Sent via Developersdex http://www.developersdex.com ***
Don't just participate in USENET...get rewarded for it!

[Jon Skeet [C# MVP]]

Gilles Nambert <gn*****@hotmail.com> wrote:

I come form VB and i'm used to Redim statement to modifiy the size of an
arry dunamically, keeping his content, and i dont't find how to do this
simple operation in C# ?

Create a new array, copy the contents of the old one to the new one
(with Array.Copy) and then set the value of the old variable to a
reference to the new array.

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

[Lasse Vågsæther Karlsen]

Gilles Nambert <gn*****@hotmail.com> wrote in news:OEUcrK0tEHA.3932
@TK2MSFTNGP10.phx.gbl:

Hi,

I come form VB and i'm used to Redim statement to modifiy the size of an
arry dunamically, keeping his content, and i dont't find how to do this
simple operation in C# ?

This is a generic solution, no doubt more specialized solutions can be made
easily:

http://www.vkarlsen.no/ReDim.cs

Example of usage:

Int32[] i = new Int32[] { 1, 2, 3 };
Debug.WriteLine("i has " + i.Length.ToString() + " elements");
i = (Int32[])ClassName.ReDim(i, 10);
Debug.WriteLine("i has " + i.Length.ToString() + " elements");

make sure you alter "ClassName" in the documentation and examples to the
name of the class where you place this, if you intend to use it.

--
Lasse Vågsæther Karlsen
http://www.vkarlsen.no/
mailto:la***@vkarlsen.no
PGP KeyID: 0x0270466B

[Rakesh Rajan]

Hi Gilles,

Oops...sorry, i though you just wanted to reinitialze an array.

For this case, you will have to use Array.Copy
http://msdn.microsoft.com/library/de...copytopic1.asp

Eg:
Array.Copy(firstArray, secondArray, firstArray.Length)

HTH,
Rakesh Rajan

"Rakesh Rajan" wrote:

Hi Gilles,

Just do a reinitialization.

Eg:
int[] myArray = new int[5];
myArray = new int[7];
HTH,
Rakesh Rajan

"Gilles Nambert" wrote:

Hi,

I come form VB and i'm used to Redim statement to modifiy the size of an
arry dunamically, keeping his content, and i dont't find how to do this
simple operation in C# ?

Thanks and best regards
Gilles
*** Sent via Developersdex http://www.developersdex.com ***
Don't just participate in USENET...get rewarded for it!

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

Hi,

An array cannot be dinamically expanded, you could just create a new one as
the other posts suggest.

My advise is to use ArrayList if you can, it's the more close thing to a VB6
array.

Cheers,

--
Ignacio Machin,
ignacio.machin AT dot.state.fl.us
Florida Department Of Transportation

"Gilles Nambert" <gn*****@hotmail.com> wrote in message
news:OE**************@TK2MSFTNGP10.phx.gbl...

Hi,

I come form VB and i'm used to Redim statement to modifiy the size of an
arry dunamically, keeping his content, and i dont't find how to do this
simple operation in C# ?

Thanks and best regards
Gilles
*** Sent via Developersdex http://www.developersdex.com ***
Don't just participate in USENET...get rewarded for it!

[David Anton]

As others have indicated, ArrayList may be a smarter choice.

The exact C# equivalent is a little messy. From our Instant C# VB.NET
to C# converter, assuming an integer array:

VB:
ReDim Preserve x(3)

C#:
int[] Temp1 = new int[4];
if (x != null)
System.Array.Copy(x, Temp1, System.Math.Min(x.Length,
Temp1.Length));
x = Temp1;

*-----------------------*
Posted at:
www.GroupSrv.com
*-----------------------*