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.

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 multidimensional,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" <(E-Mail Removed)> wrote in message
news:(E-Mail Removed)...
> 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.
>
>

* rguti <(E-Mail Removed)> 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/>

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

"rguti" <(E-Mail Removed)> wrote in message
news:(E-Mail Removed)...
> 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" <(E-Mail Removed)> wrote in message
news:cd999o$7b3$(E-Mail Removed)...

> 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.

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)(index)
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" <(E-Mail Removed)> wrote in message
news:cd999o$7b3$(E-Mail Removed)...
> Dim vArray()() As Integer
> ReDim vArray(10)(20)
> vArray(10)(10) = 10 ' etc..
> ___________________________________
> The Grim Reaper
>
> "rguti" <(E-Mail Removed)> wrote in message
> news:(E-Mail Removed)...
> > 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.
> >
> >
>
>

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

"The Grim Reaper" <(E-Mail Removed)> wrote in message
news:cd999o$7b3$(E-Mail Removed)...
> 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?

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

* Ricky W. Hunt <(E-Mail Removed)> 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/>