?
Solved

Declare collection at runtime

Posted on 2002-05-23
8
Medium Priority
?
190 Views
Last Modified: 2010-05-02
Hi I am new to Visual Basic.

I can declare a collection in Visual Basic by

Dim mybooks As New Collection

however at run time I would like to create new collections
which a user may type in.

so I woudl like to

dim ("whatever usertypes in") as new collection

and use

"whatever usertypes in" as a normal object name.

Thanks for any help.

Ber
0
Comment
Question by:bgumble
8 Comments
 
LVL 70

Expert Comment

by:Éric Moreau
ID: 7029336
Collections are compiled so you can create them at run-time. If you are using collections to store regular data (integer, date, string, ...), you can use disconnected ADO Recordset instead of collection. Recordsets can exists without a database and you can add them at run-time.
0
 
LVL 43

Expert Comment

by:TimCottee
ID: 7029427
There is no way that you are going to get something like this. You could create an array of collections so that you could reference an element in a collection using something like:

aryCollections(arrayElement)(CollectionElement).Property = "Hello"
0
 

Author Comment

by:bgumble
ID: 7029531
Hi Tim,

Thank you for your suggestion.

Could you please give me and example on how to do this.

Thanks
0
Independent Software Vendors: We Want Your Opinion

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

 

Author Comment

by:bgumble
ID: 7029541
Hi Tim,

Thank you for your suggestion.

Could you please give me and example on how to do this.

Thanks
0
 
LVL 6

Expert Comment

by:holli
ID: 7029689
Since a collection can hold all types, it can also handle other collections, so:

'A collection to hold the collections
dim myCollectionOfCollections as new collection

'The member to add
dim myCollectionMember as Collection
....


'Adding a collection
s="Name"
set myCollectionMember = new collection
myCollectionMember.add "Value", "Key"
myCollectionOfCollections.add myCollectionMember,s


'Dereferencing a collection
v=myCollectionOfCollections.Item("Name").Item("Key") 'v is now "value"


regards, holli
0
 

Author Comment

by:bgumble
ID: 7030881
Hi Holli

Thanks for the help..


That all works

however I can't seem to easly add an item to the collection that is within the collection..

I've tried

myCollectionOfCollections.Item("Name").Item("Key") = newvalue

0
 

Author Comment

by:bgumble
ID: 7030918
Actually, what I really need to know is how to add an element to the collection within the collection

thanks..
0
 
LVL 6

Accepted Solution

by:
holli earned 200 total points
ID: 7031444
just as if the collection would be single:

myCollectionOfCollections.Item("Name").Add "Key2", NewValue
0

Featured Post

Concerto Cloud for Software Providers & ISVs

Can Concerto Cloud Services help you focus on evolving your application offerings, while delivering the best cloud experience to your customers? From DevOps to revenue models and customer support, the answer is yes!

Learn how Concerto can help you.

Question has a verified solution.

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

When trying to find the cause of a problem in VBA or VB6 it's often valuable to know what procedures were executed prior to the error. You can use the Call Stack for that but it is often inadequate because it may show procedures you aren't intereste…
I was working on a PowerPoint add-in the other day and a client asked me "can you implement a feature which processes a chart when it's pasted into a slide from another deck?". It got me wondering how to hook into built-in ribbon events in Office.
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…
This lesson covers basic error handling code in Microsoft Excel using VBA. This is the first lesson in a 3-part series that uses code to loop through an Excel spreadsheet in VBA and then fix errors, taking advantage of error handling code. This l…
Suggested Courses
Course of the Month14 days, 5 hours left to enroll

807 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