creating a two dimensional array

[rguti]

Hi,

How do I create a two dimensional array?

I have created a one dimensional doing this:

Dim laFields As ArrayList = New ArrayList

How about to do a 2 dimensional?

Thanks.

[SStory]

What you have created is an arraylist.

I don't think arraylists do two dimensions inherently.
It think the idea is to add objects to the array --which is just a glorified
collection.

Your objects then have all of the properties that you need in themselves so
you don't need multiple dimensions.

If however you want a multidimensiona l,actual array in VB

dim x(2,3,4) as integer

will give you a 3 dimensional array of integers.

depends on what you want to accomplish.

HTH,

Shane
"rguti" <te**@test.co m> wrote in message
news:OB******** ******@TK2MSFTN GP12.phx.gbl...

Hi,

How do I create a two dimensional array?

I have created a one dimensional doing this:

Dim laFields As ArrayList = New ArrayList

How about to do a 2 dimensional?

Thanks.

[The Grim Reaper]

Dim vArray()() As Integer
ReDim vArray(10)(20)
vArray(10)(10) = 10 ' etc..
_______________ _______________ _____
The Grim Reaper

"rguti" <te**@test.co m> wrote in message
news:OB******** ******@TK2MSFTN GP12.phx.gbl...

Hi,

How do I create a two dimensional array?

I have created a one dimensional doing this:

Dim laFields As ArrayList = New ArrayList

How about to do a 2 dimensional?

Thanks.

[Herfried K. Wagner [MVP]]

* rguti <te**@test.co m> scripsit:

How do I create a two dimensional array?

I have created a one dimensional doing this:

Dim laFields As ArrayList = New ArrayList
That's not an array, that's an arraylist.
How about to do a 2 dimensional?

\\\
Dim aint(99, 99) As Integer
///

--
Herfried K. Wagner [MVP]
<URL:http://dotnet.mvps.org/>

[Jeff Johnson [MVP: VB]]

"The Grim Reaper" <gr*********@bt openworld.com> wrote in message
news:cd******** **@titan.btinte rnet.com...

Dim vArray()() As Integer
ReDim vArray(10)(20)
vArray(10)(10) = 10 ' etc..

Assuming that's even allowed syntax, you've got an array of arrays, not a
2-dimensional array.

[Jay B. Harlow [MVP - Outlook]]

Grim,
As Jeff suggests, you created an array of arrays (also referred to as a
Ragged or Ragged-Row Array), which is slightly different then a 2
dimensional array.

To create a 2 dimensional array 10 x 20 (11 x 21 really) you would need to
use Herfrieds or SStory's syntax of:

Dim vArray(,) As Integer
Redim vArray(10, 20)

An array of array is called a ragged array because each row does not need to
be the same length! (The ends of the rows are ragged, they don't line up).

Dim vArray()() As Integer
' size the outer array
Redim vArray(10)

For index As Integer = 0 to 10
' size each of the inner arrays
Redim vArray(index)(i ndex)
Next

Where we have an array of arrays, where each row is 1 column longer then the
previous row.

The following article does a good job of describing the various kinds of
arrays in .NET.

Hope this helps
Jay
"The Grim Reaper" <gr*********@bt openworld.com> wrote in message
news:cd******** **@titan.btinte rnet.com...

Dim vArray()() As Integer
ReDim vArray(10)(20)
vArray(10)(10) = 10 ' etc..
_______________ _______________ _____
The Grim Reaper

"rguti" <te**@test.co m> wrote in message
news:OB******** ******@TK2MSFTN GP12.phx.gbl...

Hi,

How do I create a two dimensional array?

I have created a one dimensional doing this:

Dim laFields As ArrayList = New ArrayList

How about to do a 2 dimensional?

Thanks.

[Cor Ligthert]

Jay,

The following article does a good job of describing the various kinds of
arrays in .NET.

I did not see the link to the article in in the message.

I probably will not use it however I attent you on it because if someone
starts to Google this thread

Cor

[Ricky W. Hunt]

"The Grim Reaper" <gr*********@bt openworld.com> wrote in message
news:cd******** **@titan.btinte rnet.com...

Dim vArray()() As Integer
ReDim vArray(10)(20)

I'm new to VB and I don't understand this ReDim. Why not just do a:

Dim vArray(10, 20) As Integer

and be done with it?

[Cor Ligthert]

Hi Ricky,

A redim is a redimension of your array, as soon as you have to use it, than
it is better to look to a Net collection (not the VB one) to use or to make
your own class for it or to make an arraylist of your own class objects.

I hope this helps?

Cor

[Herfried K. Wagner [MVP]]

* Ricky W. Hunt <rh*****@hotmai l.com> scripsit:

Dim vArray()() As Integer
ReDim vArray(10)(20)

I'm new to VB and I don't understand this ReDim. Why not just do a:

Dim vArray(10, 20) As Integer

and be done with it?

This would create a 2-dimensional array, not a jagged array.

For information to 'ReDim', place the caret on it and press F1.

--
Herfried K. Wagner [MVP]
<URL:http://dotnet.mvps.org/>