Arrays are reference types so they are classes but integers are not classes in C# but structs and valuetypes.  But System.Collection defines three abstract base classes, CollectionBase, ReadOnlyCollectionBase and DictionaryBase which can be inherited and used to develop custom specialized collection.

You can use System.Collections.CollectionBase and  CollectionBase.ICollection.CopyTo Method to pass ArrayList which is collection to one dimensional Array.  Try the links below the second link is for DictionaryBase, to get started.   The Querystring part is not covered in the links. Hope this helps.

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/cpref/html/frlrfsystemcollectionscollectionbaseclasstopic.asp

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/cpref/html/frlrfsystemcollectionsdictionarybaseclasstopic.asp

Can you explain a bit more? It should be easy to loop through a datatable from a datasource, and create an array from one or more columns, but what do you mean "check if they match a query string" there are numerous ways to retrieve only the record that matches the query string, so I'm curious what exactly you are trying to do?

smtraber

Thanks all,

I think I was going around this the wrong way anyway. I had a permissions table that held the userID and the ContentID of certain areas of content.
I wanted to lookup in the permissions table whether or not that user could edit that content - so I though I'd make an array of all of the userID's and see if they matched the contentID's. (from the query string).

I did it another way by cheking if that record (UserID and ContentID) exists and then granting permission if it did.
It works, but not sure which way would be best.

Thanks again,
j