arraylist.readonly equivalent.

[Ashish]

hi all,


Iam trying to create my own collection, on the lines of Arratlist, and
iam trying to implement something like ArrayList.Reado nly ,return a
readonly version of the same collection ...

any thoughts ?

TIA

[Rob Windsor [MVP]]

Re: arraylist.reado nly equivalent.

Create a class that inherits from System.Collecti ons.CollectionB ase,
implement the standard methods (i.e. Add, Insert, Remove, Item, etc), add a
boolean IsReadOnly property, then in any method or property that would
modify the internal List throw an exception if the IsReadOnly property is
true.

--
Rob Windsor [MVP-VB]
G6 Consulting
Toronto, Canada

http://msmvps.com/windsor/

"Ashish" <asharma@thisis junk.com> wrote in message
news:%239VvVjO2 FHA.1576@TK2MSF TNGP15.phx.gbl. ..[color=blue]
> hi all,
>
>
> Iam trying to create my own collection, on the lines of Arratlist, and iam
> trying to implement something like ArrayList.Reado nly ,return a readonly
> version of the same collection ...
>
> any thoughts ?
>
> TIA
>
>[/color]

[Ashish]

Re: arraylist.reado nly equivalent.

Thanks Rob,

I was also wondering as to why am i not able to implement a function
named ReadOnly(list Ilist) , that returns IList, but Arraylist has that
implementation ? ( it complains of ReadOnly being a reserved word...)

regards


Rob Windsor [MVP] wrote:[color=blue]
> Create a class that inherits from System.Collecti ons.CollectionB ase,
> implement the standard methods (i.e. Add, Insert, Remove, Item, etc), add a
> boolean IsReadOnly property, then in any method or property that would
> modify the internal List throw an exception if the IsReadOnly property is
> true.
>[/color]

[Rob Windsor [MVP]]

Re: arraylist.reado nly equivalent.

If you want to use a reserved word for the name of a member just surround it
with square brackets. For example:

Public Sub [ReadOnly](ByVal list As IList)

--
Rob Windsor [MVP-VB]
G6 Consulting
Toronto, Canada

http://msmvps.com/windsor/

"Ashish" <asharma@thisis junk.com> wrote in message
news:uVJz%23YY2 FHA.2268@TK2MSF TNGP15.phx.gbl. ..[color=blue]
> Thanks Rob,
>
> I was also wondering as to why am i not able to implement a function named
> ReadOnly(list Ilist) , that returns IList, but Arraylist has that
> implementation ? ( it complains of ReadOnly being a reserved word...)
>
> regards
>
>
> Rob Windsor [MVP] wrote:[color=green]
>> Create a class that inherits from System.Collecti ons.CollectionB ase,
>> implement the standard methods (i.e. Add, Insert, Remove, Item, etc), add
>> a boolean IsReadOnly property, then in any method or property that would
>> modify the internal List throw an exception if the IsReadOnly property is
>> true.
>>[/color][/color]