Solved

vba arrays

Posted on 2003-10-30
10
5,100 Views
Last Modified: 2009-01-23
how do I declare a global array and add values to it programmatically from one of the subforms?
0
Comment
Question by:YZlat
  • 4
  • 3
  • 3
10 Comments
 
LVL 11

Expert Comment

by:joekendall
ID: 9649998
You can declare a global array in a module.

Public myArray(10) As String

To add values to it, you would need to do something like this.

Dim n As Long

For n = 1 to 10
'This will fill the array with the value of a textbox on the subform
    myArray(n) = Forms!mySubform!myTextBox
Next

Joe
0
 
LVL 39

Expert Comment

by:stevbe
ID: 9649999
In a standard module ...

Public pvarArray()

in the form code

this will retain the data that already exists in the array and add 1 more element for you to store new data in.
ReDim Preserve pvarArray(UBound(pvarArray) + 1)

then to add a new value
pvarArray(UBound(pvarArray)) = "YourValueHere"

Steve
0
 
LVL 35

Author Comment

by:YZlat
ID: 9650087
Steve, I get an error in this line

ReDim Preserve pvarArray(UBound(pvarArray) + 1)

run-time error '9' Subscript out of range
0
Three Reasons Why Backup is Strategic

Backup is strategic to your business because your data is strategic to your business. Without backup, your business will fail. This white paper explains why it is vital for you to design and immediately execute a backup strategy to protect 100 percent of your data.

 
LVL 39

Expert Comment

by:stevbe
ID: 9650191
genric all purpose function ....

Public pvarArray As Variant

Public Function AddToArray(NewValue As Variant)
    If IsArray(pvarArray) Then
        ReDim Preserve pvarArray(UBound(pvarArray) + 1)
        pvarArray(UBound(pvarArray)) = NewValue
    Else
        pvarArray = Array(NewValue)
    End If
End Function

Steve
0
 
LVL 35

Author Comment

by:YZlat
ID: 9650934
that did not work either
0
 
LVL 35

Author Comment

by:YZlat
ID: 9650991
I tried a different approach:
I declared Public myArray as Variant in one of the public modules.
Then in my code for the subform I put
 ReDim Preserve myArray(UBound(myArray) + 1)
myArray = Array(myValue)

but then i started to get a type mismatch error in line ReDim Preserve myArray(UBound(myArray) + 1)
0
 
LVL 11

Expert Comment

by:joekendall
ID: 9651064
YZlat:

Did you try my example? If you want a dynamic array, you can change it this way.

Public myArray() As String

To add values to it, you would need to do something like this.

Dim n As Long

For n = 1 to 10
'This will fill the array with the value of a textbox on the subform
    Redim Preserve myArray(n)
    myArray(n) = Forms!mySubform!myTextBox
Next

Joe
0
 
LVL 39

Expert Comment

by:stevbe
ID: 9651082
that is because a variant is not an array until you make it one as I coded for specifically in my function. Wwe can expand it to handle any publically declared variant variable ...

Public Function AddToArray(PublicArray As Variant, NewValue As Variant)
    If IsArray(PublicArray) Then
        ReDim Preserve PublicArray(UBound(PublicArray) + 1)
        PublicArray(UBound(PublicArray)) = NewValue
    Else
        PublicArray = Array(NewValue)
    End If
End Function

then in your form you pass the array to add the value to and the value to be added to the AddToArray function.

AddToArray(myArray, myValue)

Steve
0
 
LVL 35

Author Comment

by:YZlat
ID: 9651216
joekendall, I guess I did not make it very clear what I need. I have a form and a subform. A subform ia a datasheet form and when the user clicks on one cell, the contents of the cell should be added to an array. The user should be able to add multiple items.
Then when the button clicked, the contents of an array will be manipulated further.
And if the form is closed or reloaded I want the array to empty itself.
0
 
LVL 11

Accepted Solution

by:
joekendall earned 35 total points
ID: 9651261
In a module add this code.

Public myArray() As String
Public nCounter As Long

Do you have the Click event set up? If so, just add this code.

nCounter = nCounter+1
Redim Preserve myArray(nCounter)
myArray(nCounter) = Forms!mySubform!myTextBox

To clear the array, you can do it this way.

Redim myArray(0)

Joe
0

Featured Post

Comprehensive Backup Solutions for Microsoft

Acronis protects the complete Microsoft technology stack: Windows Server, Windows PC, laptop and Surface data; Microsoft business applications; Microsoft Hyper-V; Azure VMs; Microsoft Windows Server 2016; Microsoft Exchange 2016 and SQL Server 2016.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

In a multiple monitor setup, if you don't want to use AutoCenter to position your popup forms, you have a problem: where will they appear?  Sometimes you may have an additional problem: where the devil did they go?  If you last had a popup form open…
It’s been over a month into 2017, and there is already a sophisticated Gmail phishing email making it rounds. New techniques and tactics, have given hackers a way to authentically impersonate your contacts.How it Works The attack works by targeti…
Show developers how to use a criteria form to limit the data that appears on an Access report. It is a common requirement that users can specify the criteria for a report at runtime. The easiest way to accomplish this is using a criteria form that a…
Access reports are powerful and flexible. Learn how to create a query and then a grouped report using the wizard. Modify the report design after the wizard is done to make it look better. There will be another video to explain how to put the final p…

777 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question