Re: Business objects with no properties and data binding

Properties are not encapsulation. They are syntactical sugar of a language.

Getters usually do not change the state of the object. Setters might. For instance, if you want to keep a list of properties that are changed you would have a BitArray which gets updated whenever setters are called.


-----Original Message-----
From: Discussion of building .NET applications targeted for the Web [mailto:[email protected]] On Behalf Of Pardee, Roy
Sent: Friday, March 02, 2007 14:54
To: [email protected]
Subject: Re: [DOTNET-WEB] Business objects with no properties and data binding

But isn't hiding the details of how a property getter is implemented
encapsulation?  Consumer doesn't need to worry about exactly how an
object manages to produce the prop value when it's asked--it just knows
that it will.

I'd be interested to hear about how your object's state changes when
your prop getters are called...

-----Original Message-----
From: Discussion of building .NET applications targeted for the Web
[mailto:[email protected]] On Behalf Of Alex Ivanoff
Sent: Friday, March 02, 2007 12:32 PM
To: [email protected]
Subject: Re: [DOTNET-WEB] Business objects with no properties and data
binding

OO is about encapsulation, polymorphism and inheritance, not properties.



On 3/2/07, Pardee, Roy <[email protected]> wrote:
>
> I thought that was a feature of OO--that you could hide the 
> implementation of a property from the end-user?
>
> -----Original Message-----
> From: Discussion of building .NET applications targeted for the Web 
> [mailto:[email protected]] On Behalf Of Ivanoff, Alex
> Sent: Friday, March 02, 2007 6:56 AM
> To: [email protected]
> Subject: Re: [DOTNET-WEB] Business objects with no properties and data

> binding
>
> My original sample was simplified. My real object accessors are more 
> involved (change object state). Plus, I do not like properties since 
> they look like fields but behave like methods (Jeffrey Richter 
> explained it great in his book "CLR via C#").
>
>
> -----Original Message-----
> From: Discussion of building .NET applications targeted for the Web 
> [mailto:[email protected]] On Behalf Of Paul van Brenk
> Sent: Friday, March 02, 2007 03:21
> To: [email protected]
> Subject: Re: [DOTNET-WEB] Business objects with no properties and data

> binding
>
> Why are the objects designed this way... just asking, maybe there is 
> something I'm missing.
>
> I would do this:
>
> public class State
> {
> private String _abbr;
> private String _name;
>
> public String Abbr
> {
>        get{    return this._abbr; }
> }
>
> public String Name
> {
> get{    return this._name; }
> }
> }
>
> -----Original Message-----
> From: Discussion of building .NET applications targeted for the Web 
> [mailto:[email protected]] On Behalf Of Alex Ivanoff
> Sent: Thursday, March 01, 2007 22:20
> To: [email protected]
> Subject: [DOTNET-WEB] Business objects with no properties and data 
> binding
>
> Is it possible to data bind a web control (DropDownList) to a list of 
> business objects which do not have properties but accessor methods
> instead:
>
> public class State
> {
> private String _abbr;
> private String _name;
>
> public String GetAbbr()
> {
>    return this._abbr;
> }
>
> public String GetName()
> {
>    return this._name;
> }
> }
>
> Thank you,
> Alex
>
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