Property. Which one should I use?

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shapper - 30 May 2007 13:47 GMT

Hello,

Is there a difference between defining a control property in the
following two ways:

' Items ...
Private _Items As Generic.List(Of ListItem) = New Generic.List(Of
ListItem) ****
Property Items() As Generic.List(Of ListItem)
Get
Return _Items
End Get
Set(ByVal value As Generic.List(Of ListItem))
_Items = value
End Set
End Property ' Items

Or

' Items ...
Private _Items As Generic.List(Of ListItem) ****
Property Items() As Generic.List(Of ListItem)
Get
If _Items Is Nothing Then
****
_Items = New Generic.List(Of WebControl) ****
End
If ****
Return _Items
End Get
Set(ByVal value As Generic.List(Of ListItem))
_Items = value
End Set
End Property ' Items

I marked the differences with ****.

Which approach should I use?

Thanks,
Miguel

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KJ - 30 May 2007 14:47 GMT

Why declare it as ListItem, then assign as WebControl?

> Hello,
>
[quoted text clipped - 37 lines]
> Thanks,
> Miguel

Reply to this Message

shapper - 30 May 2007 18:21 GMT

> Why declare it as ListItem, then assign as WebControl?
>
[quoted text clipped - 39 lines]
> > Thanks,
> > Miguel

Sorry,

That was a type mistake.
My question is if I should declare a default value when I do "dim ..."

Or use an IF inside Get in property.

Thanks,
Miguel

Reply to this Message

KJ - 31 May 2007 16:48 GMT

Miguel,

At the very least, you should declare it and assign as Nothing.

In the property, you can assign the List to have a value if it's still
Nothing. That is fine; it's also known as "Lazy Instantiation"

> > Why declare it as ListItem, then assign as WebControl?
>
[quoted text clipped - 53 lines]
> Thanks,
> Miguel

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Property. Which one should I use?

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