Nouveautés de VB2008

[Gilbert Tordeur]

Bonjour.

N'y aurait-il pas depuis la VB8 un moyen d'assigner en une seule instruction
l'ensemble des propriétés d'un objet aux propriétés de mêmes noms d'un autre
objet, plutôt que d'écrire la liste fastidieuse :

O2.P1 = O1.P1
O2.P2 = O1.P2
O3.P2 = O1.P3
etc.

Une sorte de MOVE CORRESPONDING en COBOL en quelque sorte.

Il me semble avoir entendu parler de quelque chose de semblable lors d'une
présentation de LINQ, mais le souvenir est trop vague.

Merci de votre aide,
Gilbert

[rowe_newsgroups]

On Aug 29, 9:19*am, "Gilbert Tordeur" <[e-mail]>
wrote:

Bonjour.

N'y aurait-il pas depuis la VB8 un moyen d'assigner en une seule instruction
l'ensemble des propriétés d'un objet aux propriétés de mêmes noms d'un autre
objet, plutôt que d'écrire la liste fastidieuse :

O2.P1 = O1.P1
O2.P2 = O1.P2
O3.P2 = O1.P3
etc.

Une sorte de MOVE CORRESPONDING en COBOL en quelque sorte.

Il me semble avoir entendu parler de quelque chose de semblable lors d'une
présentation de LINQ, mais le souvenir est trop vague.

Merci de votre aide,
Gilbert

English please?

Thanks,

Seth Rowe [MVP]
http://sethrowe.blogspot.com/

[Gilbert Tordeur]

Sorry, in English :

Hello,
Is there a way since VB2008 to assign with only one statement all the
properties of an object to the (same name) properties of another object,
instead of coding number of trivial lines like

O2.P1 = O1.P1
O2.P2 = O1.P2
O2.P3 = O1.P3
etc.

Something like a MOVE CORRESPONDING in COBOL.

I think I have heard somethink like this in a LINQ meeting sometime ago, but
I do not remember. Thank you for your help.
Gilbert

[rowe_newsgroups]

On Aug 29, 9:38*am, "Gilbert Tordeur" <[e-mail]>
wrote:

Sorry, in English :

Hello,
Is there a way since VB2008 to assign with only one statement all the
properties of an object to the (same name) properties of another object,
instead of coding number of trivial lines like

O2.P1 = O1.P1
O2.P2 = O1.P2
O2.P3 = O1.P3
etc.

Something like a MOVE CORRESPONDING in COBOL.

I think I have heard somethink like this in a LINQ meeting sometime ago, but
I do not remember. Thank you for your help.
Gilbert

I don't think there is a built in method (I could be wrong).

Once upon a time I wrote a piece using Reflection that did this, but
I'm not sure where that code is. Basically you do a GetProperties on
the source class and then you attempt to do a set value for each of
the properties in the destination class, not the cleanest solution,
but it works.

Thanks,

Seth Rowe [MVP]
http://sethrowe.blogspot.com/

[Gilbert Tordeur]

OK, I think I can do that.
Thank you,
Gilbert

"rowe_newsgroups" <ro********@yahoo.coma écrit dans le message de news:
b7**********************************...oglegroups.com...
On Aug 29, 9:38 am, "Gilbert Tordeur" <[e-mail]>
wrote:

Sorry, in English :

Hello,
Is there a way since VB2008 to assign with only one statement all the
properties of an object to the (same name) properties of another object,
instead of coding number of trivial lines like

O2.P1 = O1.P1
O2.P2 = O1.P2
O2.P3 = O1.P3
etc.

Something like a MOVE CORRESPONDING in COBOL.

I think I have heard somethink like this in a LINQ meeting sometime ago,
but
I do not remember. Thank you for your help.
Gilbert

I don't think there is a built in method (I could be wrong).

Once upon a time I wrote a piece using Reflection that did this, but
I'm not sure where that code is. Basically you do a GetProperties on
the source class and then you attempt to do a set value for each of
the properties in the destination class, not the cleanest solution,
but it works.

Thanks,

Seth Rowe [MVP]
http://sethrowe.blogspot.com/

[rowe_newsgroups]

On Aug 29, 10:05*am, "Gilbert Tordeur" <[e-mail]>
wrote:

OK, I think I can do that.
Thank you,
Gilbert

"rowe_newsgroups" <[e-mail] écrit dans le message de news:
[e-mail]...
On Aug 29, 9:38 am, "Gilbert Tordeur" <[e-mail]>
wrote:

Sorry, in English :

Hello,
Is there a way since VB2008 to assign with only one statement all the
properties of an object to the (same name) properties of another object,
instead of coding number of trivial lines like

O2.P1 = O1.P1
O2.P2 = O1.P2
O2.P3 = O1.P3
etc.

Something like a MOVE CORRESPONDING in COBOL.

I think I have heard somethink like this in a LINQ meeting sometime ago,
but
I do not remember. Thank you for your help.
Gilbert

I don't think there is a built in method (I could be wrong).

Once upon a time I wrote a piece using Reflection that did this, but
I'm not sure where that code is. Basically you do a GetProperties on
the source class and then you attempt to do a set value for each of
the properties in the destination class, not the cleanest solution,
but it works.

Thanks,

Seth Rowe [MVP]http://sethrowe.blogspot.com/

I just threw some code onto my blog that should do this. As a warning
it's completely untested!

http://sethrowe.blogspot.com/2008/08...ing-class.html

Thanks,

Seth Rowe [MVP]
http://sethrowe.blogspot.com/

[Andrew Morton]

Gilbert Tordeur wrote:

Is there a way since VB2008 to assign with only one statement all the
properties of an object to the (same name) properties of another
object, instead of coding number of trivial lines like

>O2.P1 = O1.P1
O2.P2 = O1.P2
O2.P3 = O1.P3
etc.

I could be getting the wrong idea, but isn't that what .Clone is for?

Andrew

[rowe_newsgroups]

On Aug 29, 10:33*am, "Andrew Morton" <[e-mail]>
wrote:

Gilbert Tordeur wrote:

Is there a way since VB2008 to assign with only one statement all the
properties of an object to the (same name) properties of another
object, instead of coding number of trivial lines like

O2.P1 = O1.P1
O2.P2 = O1.P2
O2.P3 = O1.P3
etc.

I could be getting the wrong idea, but isn't that what .Clone is for?

Andrew

Clone doesn't work if you want to change class types (which is what I
took as what the OP was looking for). It also will only work with the
class implements ICloneable.

Thanks,

Seth Rowe [MVP]
http://sethrowe.blogspot.com/

[Gilbert Tordeur]

Andrew,
I think .Clone is for the same class, but if you copy to an object of
another class ?
Regards,
Gilbert
"Andrew Morton" <ak*@in-press.co.uk.invalida écrit dans le message de
news: 6h************@mid.individual.net...

Gilbert Tordeur wrote:

>Is there a way since VB2008 to assign with only one statement all the
properties of an object to the (same name) properties of another
object, instead of coding number of trivial lines like

>>O2.P1 = O1.P1
O2.P2 = O1.P2
O2.P3 = O1.P3
etc.

I could be getting the wrong idea, but isn't that what .Clone is for?

Andrew

[Gilbert Tordeur]

OK, I got it. I will try and let you know.
Regards,
Gilbert

"rowe_newsgroups" <ro********@yahoo.coma écrit dans le message de news:
c5**********************************...oglegroups.com...
On Aug 29, 10:05 am, "Gilbert Tordeur" <[e-mail]>
wrote:

OK, I think I can do that.
Thank you,
Gilbert

"rowe_newsgroups" <[e-mail] écrit dans le message de news:
[e-mail]...
On Aug 29, 9:38 am, "Gilbert Tordeur" <[e-mail]>
wrote:

Sorry, in English :

Hello,
Is there a way since VB2008 to assign with only one statement all the
properties of an object to the (same name) properties of another object,
instead of coding number of trivial lines like

O2.P1 = O1.P1
O2.P2 = O1.P2
O2.P3 = O1.P3
etc.

Something like a MOVE CORRESPONDING in COBOL.

I think I have heard somethink like this in a LINQ meeting sometime ago,
but
I do not remember. Thank you for your help.
Gilbert

I don't think there is a built in method (I could be wrong).

Once upon a time I wrote a piece using Reflection that did this, but
I'm not sure where that code is. Basically you do a GetProperties on
the source class and then you attempt to do a set value for each of
the properties in the destination class, not the cleanest solution,
but it works.

Thanks,

Seth Rowe [MVP]http://sethrowe.blogspot.com/

I just threw some code onto my blog that should do this. As a warning
it's completely untested!

http://sethrowe.blogspot.com/2008/08...ing-class.html

Thanks,

Seth Rowe [MVP]
http://sethrowe.blogspot.com/

[Phill W.]

Gilbert Tordeur wrote:

Is there a way since VB2008 to assign with only one statement all the
properties of an object to the (same name) properties of another object,
instead of coding number of trivial lines like

>O2.P1 = O1.P1
O2.P2 = O1.P2
O2.P3 = O1.P3
etc.

To copy absolutely /everything/, implement a Clone() method.

To create one object [class] based on another object [class], create the
relevant constructor in the second class:

Class C1
Public Sub New()
End Sub
End Class

Class C2
Public Sub New( ByVal source as C1 )
End Sub
End Class

Dim o1 as New C1()
Dim o2 as New C2( o1 )

Even if there /was/ a way of doing this "automagically", personally, I'd
avoid it; I like to [think I] know what my code is actually doing! :-)
YMMV.

HTH,
Phill W.