How do I declare an array of structures? Do I use NEW?

  • Thread starter Thread starter neuromancer
  • Start date Start date
N

neuromancer

I have a structure that has members that are other structures or
enums.
Here it is:

Public Structure ColumnType
dim Name As String
dim ConsecType As enumConsecutiveTypes
dim AllowedTextValues() As structTextValueAndCount /*ARRAY*/
dim Dependent As Boolean
End Structure

Then I declare:
Public gColumnStruct As New ColumnType()

But when I try and refer to "gColumnStruct.Dependent", I'm told that
'Dependent' is not a member. Whats wrong with the declaration?

Also, in the structure, I have another structure:
dim AllowedTextValues() As structTextValueAndCount
But I'm not sure if this is correct. Do I need to use the word NEW,
as in:
dim AllowedTextValues() As NEW structTextValueAndCount

And even if I did, would that allocate space for every member of the
array?
Thanks,
FN13
 
Am 15.10.2010 16:02, schrieb neuromancer:
I have a structure that has members that are other structures or
enums.
Here it is:

Public Structure ColumnType
dim Name As String
dim ConsecType As enumConsecutiveTypes
dim AllowedTextValues() As structTextValueAndCount /*ARRAY*/
dim Dependent As Boolean
End Structure

Then I declare:
Public gColumnStruct As New ColumnType()

But when I try and refer to "gColumnStruct.Dependent", I'm told that
'Dependent' is not a member. Whats wrong with the declaration?
Click to expand...

I can't repro the problem. This works here:

Dim gColumnStruct As New ColumnType()
gColumnStruct.Dependent = True

You don't need "New" here because a Structure is a value type.
If you drop it, also remove the braces, otherwise you'd declare
an array variable.
Also, in the structure, I have another structure:
dim AllowedTextValues() As structTextValueAndCount
But I'm not sure if this is correct. Do I need to use the word NEW,
as in:
dim AllowedTextValues() As NEW structTextValueAndCount
Click to expand...


In this way, 'New' is not allowed, because, if you create an array, you
must specify it's length. In this case, use ReDim:

Dim gColumnStruct As ColumnType

ReDim gColumnStruct.AllowedTextValues(12)

And even if I did, would that allocate space for every member of the
array?
Click to expand...

Yes, it does. All members get their default values.


To be safe, I recommend to write a Class instead of a Structure because then
you can write

Public AllowedTextValues(35) As Integer
 
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