2 dimensional array question

  • Thread starter Thread starter fniles
  • Start date Start date
F

fniles

I need to store information in a 2 dimensional array. I understand ArrayList
only works for a single dimensional array, is that correct ?
So, I use the 2 dimensional array like in VB6. I pass the array into a
subroutine, and inside it I "Redim Preserve" the array to increase the
number of item in the array. I got the error "Redim statement requires an
array", but arr is an array. HOw can I fix this problem ? Or, how can I do
ArrayList for 2 dimensional array ?
THank you very much.

Private arr(COM_MAX, 0) As String
LoadArr(arr)

Sub LoadArr(ByRef arr As Array)
lNumComm = 0
For x = 1 to 1000
ReDim Preserve arr(COM_MAX, lNumComm)--->Redim statement requires an array
:
next
 
fniles said:
I need to store information in a 2 dimensional array. I understand
ArrayList only works for a single dimensional array, is that correct ?
So, I use the 2 dimensional array like in VB6. I pass the array into a
subroutine, and inside it I "Redim Preserve" the array to increase the
number of item in the array. I got the error "Redim statement requires an
array", but arr is an array. HOw can I fix this problem ? Or, how can I do
ArrayList for 2 dimensional array ?
THank you very much.

Private arr(COM_MAX, 0) As String
LoadArr(arr)

Sub LoadArr(ByRef arr As Array)
Click to expand...

Pass it in the same way you define the array, eg
Sub LoadArr(ByRef arr As int(,))
Click to expand...

BTW, redim preserve does a complete copy of every element in the array every
time it's called. In your loop that will mean half a million copies for each
column.

Michael
 
Michael C is right about the Redim Preserve. I wouldn't do that.
I'd use an arraylist or a generic list (depending on what version
of .Net you're using.)

Robin S.
---------------------------------
 
RobinS said:
Michael C is right about the Redim Preserve. I wouldn't do that.
I'd use an arraylist or a generic list (depending on what version
of .Net you're using.)
Click to expand...

Or redim at the start or redim at set intervals.

Michael
 
Thank you everybody.
I would like to use ArrayList, but it does not work with 2 dimensional
array, does it ?
How can I have a 2 dimensional array ArrayList ?
 
fniles said:
Thank you everybody.
I would like to use ArrayList, but it does not work with 2 dimensional
array, does it ?
How can I have a 2 dimensional array ArrayList ?
Click to expand...

You can put an array into each element of the arraylist I guess. Although
there is nothing wrong with using Redim Preserve if you limit it's use by
increasing the size of the array, say, every 1000 elements.

Michael
 
Back
Top