add null to collectionbase derivation

[John B]

I changed my code to replace an arraylist with a collection derived from
collectionbase to get type-safe calls. Now though, I cannot seem to add a
null value to the collection, where I could previously with an arraylist. Am
I doing something wrong? Is there a way around it?

Thx

[Chad Z. Hower aka Kudzu]

"John B" <sp******@hotmail.con> wrote in
news:fu********************@mycybernet.net:

I changed my code to replace an arraylist with a collection derived from
collectionbase to get type-safe calls. Now though, I cannot seem to add
a null value to the collection, where I could previously with an
arraylist. Am I doing something wrong? Is there a way around it?

Stating actual errors I've found is quite useful when requesting help.
--
Chad Z. Hower (a.k.a. Kudzu) - http://www.hower.org/Kudzu/
"Programming is an art form that fights back"

Get your ASP.NET in gear with IntraWeb!
http://www.atozed.com/IntraWeb/

[John B]

Here is the class:

public class ControlCollection : CollectionBase
{
public void Add(Control control)
{
base.List.Add(control);
...
}

....
}

and here is the error when control is null:

ArguementNullException was unhandled
Value can not be null.
Parameter name: value

Thanks
---

"Chad Z. Hower aka Kudzu" <cp**@hower.org> wrote in message
news:Xn******************@127.0.0.1...

"John B" <sp******@hotmail.con> wrote in
news:fu********************@mycybernet.net:

I changed my code to replace an arraylist with a collection derived from
collectionbase to get type-safe calls. Now though, I cannot seem to add
a null value to the collection, where I could previously with an
arraylist. Am I doing something wrong? Is there a way around it?

Stating actual errors I've found is quite useful when requesting help.
--
Chad Z. Hower (a.k.a. Kudzu) - http://www.hower.org/Kudzu/
"Programming is an art form that fights back"

Get your ASP.NET in gear with IntraWeb!
http://www.atozed.com/IntraWeb/

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[Chad Z. Hower aka Kudzu]

"John B" <sp******@hotmail.con> wrote in news:42**********@127.0.0.1:

ArguementNullException was unhandled
Value can not be null.
Parameter name: value

This is coming from CollectionBase - it probably does not allow nulls as part
of its functionality, which would make sense for a collection.
--
Chad Z. Hower (a.k.a. Kudzu) - http://www.hower.org/Kudzu/
"Programming is an art form that fights back"

Get your ASP.NET in gear with IntraWeb!
http://www.atozed.com/IntraWeb/

[Ollie Riches]

you can't add a null to strongly typed collection, it is only going to
accept objects of the type required, a null value does not have a typed
defined.

HTH

Ollie Riches
"John B" <sp******@hotmail.con> wrote in message
news:42**********@127.0.0.1...

Here is the class:

public class ControlCollection : CollectionBase
{
public void Add(Control control)
{
base.List.Add(control);
...
}

...
}

and here is the error when control is null:

ArguementNullException was unhandled
Value can not be null.
Parameter name: value

Thanks
---

"Chad Z. Hower aka Kudzu" <cp**@hower.org> wrote in message
news:Xn******************@127.0.0.1...

"John B" <sp******@hotmail.con> wrote in
news:fu********************@mycybernet.net:

I changed my code to replace an arraylist with a collection derived from collectionbase to get type-safe calls. Now though, I cannot seem to add a null value to the collection, where I could previously with an
arraylist. Am I doing something wrong? Is there a way around it?
Stating actual errors I've found is quite useful when requesting help.
--
Chad Z. Hower (a.k.a. Kudzu) - http://www.hower.org/Kudzu/
"Programming is an art form that fights back"

Get your ASP.NET in gear with IntraWeb!
http://www.atozed.com/IntraWeb/

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