how to turn ICollection into ArrayList?

[MrNobody]

since ArrayList implements ICollection, is there a quick way to convert an
ICollection into ArrayList (besides actually iterating through each element
in the ICollection and explicitly adding them to a new ArrayList instance) ??

[Cor Ligthert]

Re: how to turn ICollection into ArrayList?

Hi,

Did you ever saw this page?

addrange

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

I hope this helps?

Cor

[Peter Rilling]

Re: how to turn ICollection into ArrayList?

AddRange simply iterates the collection and copies the items.

MrNobody, I guess the question that I have is, when you refer to "quick",
are you talking about the fewest number of code lines, or the fewest number
of program cycles.

There is no way to automatically turn an ICollection into an ArrayList
without copying the items, unless the collection was originally an
ArrayList. But the simplest way might be to use AddRange like Cor mentioned
below.


"Cor Ligthert" <notmyfirstname @planet.nl> wrote in message
news:esL3V2c8EH A.2568@TK2MSFTN GP11.phx.gbl...[color=blue]
> Hi,
>
> Did you ever saw this page?
>
> addrange
>[/color]
http://msdn.microsoft.com/library/de...rangetopic.asp[color=blue]
>
> I hope this helps?
>
> Cor
>
>[/color]

[Shariq Khan]

Re: how to turn ICollection into ArrayList?

You can use the AddRange method of the ArrayList to add from an object that
implements an IList interface.

See

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

Shariq Khan
shariq@shariqkh an.com


"MrNobody" <MrNobody@discu ssions.microsof t.com> wrote in message
news:FED3B1C9-5849-41DA-B164-9155999303BA@mi crosoft.com...[color=blue]
> since ArrayList implements ICollection, is there a quick way to convert an
> ICollection into ArrayList (besides actually iterating through each
> element
> in the ICollection and explicitly adding them to a new ArrayList instance)
> ??
>
>[/color]

[Jay B. Harlow [MVP - Outlook]]

Re: how to turn ICollection into ArrayList?

MrNobody,
In addition to the AddRange method, I would probably simply use the
ArrayList constructor that accepts an ICollection:

Dim collection As ICollection
Dim list As New ArrayList(colle ction)

For details on this constructor see:

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/cpref/html/frlrfsystemcollectionsarraylistclassctortopic2.asp

Hope this helps
Jay

"MrNobody" <MrNobody@discu ssions.microsof t.com> wrote in message
news:FED3B1C9-5849-41DA-B164-9155999303BA@mi crosoft.com...[color=blue]
> since ArrayList implements ICollection, is there a quick way to convert an
> ICollection into ArrayList (besides actually iterating through each
> element
> in the ICollection and explicitly adding them to a new ArrayList instance)
> ??
>
>[/color]

[Jay B. Harlow [MVP - Outlook]]

Re: how to turn ICollection into ArrayList?

Doh!
I should have given a C# sample :-|

ICollection collection;
ArrayList list = new ArrayList(colle ction);

Jay

"Jay B. Harlow [MVP - Outlook]" <Jay_Harlow_MVP @msn.com> wrote in message
news:uShKBPe8EH A.3076@TK2MSFTN GP15.phx.gbl...[color=blue]
> MrNobody,
> In addition to the AddRange method, I would probably simply use the
> ArrayList constructor that accepts an ICollection:
>
> Dim collection As ICollection
> Dim list As New ArrayList(colle ction)
>
> For details on this constructor see:
>
> http://msdn.microsoft.com/library/de...ctortopic2.asp
>
> Hope this helps
> Jay
>
> "MrNobody" <MrNobody@discu ssions.microsof t.com> wrote in message
> news:FED3B1C9-5849-41DA-B164-9155999303BA@mi crosoft.com...[color=green]
>> since ArrayList implements ICollection, is there a quick way to convert
>> an
>> ICollection into ArrayList (besides actually iterating through each
>> element
>> in the ICollection and explicitly adding them to a new ArrayList
>> instance) ??
>>
>>[/color]
>
>[/color]

[MrNobody]

Re: how to turn ICollection into ArrayList?

Yeah I was kinda hoping for something that used least cpu cycles- like a type
cast , butt it's ok because I don't really have THAT many items in this
collection... Thanks everyone

[Ignacio Machin \( .NET/ C# MVP \)]

Re: how to turn ICollection into ArrayList?

Hi,

A shallow copy is the only way of doing it, as ArrayList has its own
internal way to keep the data. Also with a copy the original collection can
be modified afterwards and the arraylist will not be changed.

Cheers,

--
Ignacio Machin,
ignacio.machin AT dot.state.fl.us
Florida Department Of Transportation

"MrNobody" <MrNobody@discu ssions.microsof t.com> wrote in message
news:BDDC4EF1-EA9A-4EDF-95C5-1207D845BF41@mi crosoft.com...[color=blue]
> Yeah I was kinda hoping for something that used least cpu cycles- like a
> type
> cast , butt it's ok because I don't really have THAT many items in this
> collection... Thanks everyone[/color]