How to back up an object...

[Simon Verona]

I have a custom class inherited from a third party control.

Within the class, I need to make a backup copy of the class so that I can
change the properties (font size etc) for printing.

So, I'm using code such as...

Dim backup as dmsreport =me
backup.font=newfont
backup.print
etc etc
I was expecting this not to change any of the parameters of my original
object, however I find that "backup" is created simply as a reference to
"me" and therefore "me" contains all the updates I subsequently make to the
backup.

How do I make a copy of the object so that I can work on the copy without
changing the original?

Hope that this makes sense!

Regards
Simon

[JohnFol]

What happens if you use the New keyword?
"Simon Verona" <ne**@aphroditeuk.com> wrote in message
news:eo**************@TK2MSFTNGP15.phx.gbl...

I have a custom class inherited from a third party control.

Within the class, I need to make a backup copy of the class so that I can
change the properties (font size etc) for printing.

So, I'm using code such as...

Dim backup as dmsreport =me
backup.font=newfont
backup.print
etc etc
I was expecting this not to change any of the parameters of my original
object, however I find that "backup" is created simply as a reference to
"me" and therefore "me" contains all the updates I subsequently make to
the backup.

How do I make a copy of the object so that I can work on the copy without
changing the original?

Hope that this makes sense!

Regards
Simon

[Simon Verona]

John

I did try splitting the line into :

dim backup as new dmsreport
backup=me

but this seems to have the same affect.

Regards
Simon
"JohnFol" <Ou************@WibbleObbble.Com> wrote in message
news:ah******************@newsfe5-win.ntli.net...

What happens if you use the New keyword?
"Simon Verona" <ne**@aphroditeuk.com> wrote in message
news:eo**************@TK2MSFTNGP15.phx.gbl...

I have a custom class inherited from a third party control.

Within the class, I need to make a backup copy of the class so that I can
change the properties (font size etc) for printing.

So, I'm using code such as...

Dim backup as dmsreport =me
backup.font=newfont
backup.print
etc etc
I was expecting this not to change any of the parameters of my original
object, however I find that "backup" is created simply as a reference to
"me" and therefore "me" contains all the updates I subsequently make to
the backup.

How do I make a copy of the object so that I can work on the copy without
changing the original?

Hope that this makes sense!

Regards
Simon

[JohnFol]

ok, I created a new form called Form1 with a single button on it,. The code
is as follows

Dim MyCopyForm As New Form1

MyCopyForm.BackColor = BackColor.Bisque

MyCopyForm.Show()

This gives me the copy I was after. I think the problem you are having is
you explicitly set the "copy" to point to the original. Just try

Dim backup as dmsreport
backup.font=newfont
backup.print


"Simon Verona" <ne**@aphroditeuk.com> wrote in message
news:OZ**************@TK2MSFTNGP14.phx.gbl...

John

I did try splitting the line into :

dim backup as new dmsreport
backup=me

but this seems to have the same affect.

Regards
Simon
"JohnFol" <Ou************@WibbleObbble.Com> wrote in message
news:ah******************@newsfe5-win.ntli.net...

What happens if you use the New keyword?
"Simon Verona" <ne**@aphroditeuk.com> wrote in message
news:eo**************@TK2MSFTNGP15.phx.gbl...

I have a custom class inherited from a third party control.

Within the class, I need to make a backup copy of the class so that I
can change the properties (font size etc) for printing.

So, I'm using code such as...

Dim backup as dmsreport =me
backup.font=newfont
backup.print
etc etc
I was expecting this not to change any of the parameters of my original
object, however I find that "backup" is created simply as a reference to
"me" and therefore "me" contains all the updates I subsequently make to
the backup.

How do I make a copy of the object so that I can work on the copy
without changing the original?

Hope that this makes sense!

Regards
Simon

[Simon Verona]

Well, I could do that, but I was slightly oversimplifying the problem, I
actually change a number of properties, so I thought I could get away with
saving the whole object rather than each property individually...

Regards
Simon
"JohnFol" <Ou************@WibbleObbble.Com> wrote in message
news:SX*****************@newsfe5-win.ntli.net...

ok, I created a new form called Form1 with a single button on it,. The
code is as follows

Dim MyCopyForm As New Form1

MyCopyForm.BackColor = BackColor.Bisque

MyCopyForm.Show()

This gives me the copy I was after. I think the problem you are having is
you explicitly set the "copy" to point to the original. Just try

Dim backup as dmsreport
backup.font=newfont
backup.print


"Simon Verona" <ne**@aphroditeuk.com> wrote in message
news:OZ**************@TK2MSFTNGP14.phx.gbl...

John

I did try splitting the line into :

dim backup as new dmsreport
backup=me

but this seems to have the same affect.

Regards
Simon
"JohnFol" <Ou************@WibbleObbble.Com> wrote in message
news:ah******************@newsfe5-win.ntli.net...

What happens if you use the New keyword?
"Simon Verona" <ne**@aphroditeuk.com> wrote in message
news:eo**************@TK2MSFTNGP15.phx.gbl...
I have a custom class inherited from a third party control.

Within the class, I need to make a backup copy of the class so that I
can change the properties (font size etc) for printing.

So, I'm using code such as...

Dim backup as dmsreport =me
backup.font=newfont
backup.print
etc etc
I was expecting this not to change any of the parameters of my original
object, however I find that "backup" is created simply as a reference
to "me" and therefore "me" contains all the updates I subsequently make
to the backup.

How do I make a copy of the object so that I can work on the copy
without changing the original?

Hope that this makes sense!

Regards
Simon

[Dennis]

If the class is a "roll your own", you can add a Copy Property that uses
"PropertyInfo" to copy all of the properties to a new instance of your class.
If not roll your own, you can create a function to copy all the property
values to a new instance of the class.

"Simon Verona" wrote:

Well, I could do that, but I was slightly oversimplifying the problem, I
actually change a number of properties, so I thought I could get away with
saving the whole object rather than each property individually...

Regards
Simon
"JohnFol" <Ou************@WibbleObbble.Com> wrote in message
news:SX*****************@newsfe5-win.ntli.net...

ok, I created a new form called Form1 with a single button on it,. The
code is as follows

Dim MyCopyForm As New Form1

MyCopyForm.BackColor = BackColor.Bisque

MyCopyForm.Show()

This gives me the copy I was after. I think the problem you are having is
you explicitly set the "copy" to point to the original. Just try

Dim backup as dmsreport
backup.font=newfont
backup.print


"Simon Verona" <ne**@aphroditeuk.com> wrote in message
news:OZ**************@TK2MSFTNGP14.phx.gbl...

John

I did try splitting the line into :

dim backup as new dmsreport
backup=me

but this seems to have the same affect.

Regards
Simon
"JohnFol" <Ou************@WibbleObbble.Com> wrote in message
news:ah******************@newsfe5-win.ntli.net...
What happens if you use the New keyword?
"Simon Verona" <ne**@aphroditeuk.com> wrote in message
news:eo**************@TK2MSFTNGP15.phx.gbl...
>I have a custom class inherited from a third party control.
>
> Within the class, I need to make a backup copy of the class so that I
> can change the properties (font size etc) for printing.
>
> So, I'm using code such as...
>
> Dim backup as dmsreport =me
> backup.font=newfont
> backup.print
> etc etc
>
>
> I was expecting this not to change any of the parameters of my original
> object, however I find that "backup" is created simply as a reference
> to "me" and therefore "me" contains all the updates I subsequently make
> to the backup.
>
> How do I make a copy of the object so that I can work on the copy
> without changing the original?
>
> Hope that this makes sense!
>
> Regards
> Simon
>

[Simon Verona]

Thanks, I'll have to do that.

Regards
Simon
"Dennis" <De****@discussions.microsoft.com> wrote in message
news:13**********************************@microsof t.com...

If the class is a "roll your own", you can add a Copy Property that uses
"PropertyInfo" to copy all of the properties to a new instance of your
class.
If not roll your own, you can create a function to copy all the property
values to a new instance of the class.

"Simon Verona" wrote:

Well, I could do that, but I was slightly oversimplifying the problem, I
actually change a number of properties, so I thought I could get away
with
saving the whole object rather than each property individually...

Regards
Simon
"JohnFol" <Ou************@WibbleObbble.Com> wrote in message
news:SX*****************@newsfe5-win.ntli.net...

> ok, I created a new form called Form1 with a single button on it,. The
> code is as follows
>
> Dim MyCopyForm As New Form1
>
> MyCopyForm.BackColor = BackColor.Bisque
>
> MyCopyForm.Show()
>
>
>
> This gives me the copy I was after. I think the problem you are having
> is
> you explicitly set the "copy" to point to the original. Just try
>
> Dim backup as dmsreport
> backup.font=newfont
> backup.print
>
>
>
>
>
>
>
>
> "Simon Verona" <ne**@aphroditeuk.com> wrote in message
> news:OZ**************@TK2MSFTNGP14.phx.gbl...
>> John
>>
>> I did try splitting the line into :
>>
>> dim backup as new dmsreport
>> backup=me
>>
>> but this seems to have the same affect.
>>
>> Regards
>> Simon
>> "JohnFol" <Ou************@WibbleObbble.Com> wrote in message
>> news:ah******************@newsfe5-win.ntli.net...
>>> What happens if you use the New keyword?
>>>
>>>
>>> "Simon Verona" <ne**@aphroditeuk.com> wrote in message
>>> news:eo**************@TK2MSFTNGP15.phx.gbl...
>>>>I have a custom class inherited from a third party control.
>>>>
>>>> Within the class, I need to make a backup copy of the class so that
>>>> I
>>>> can change the properties (font size etc) for printing.
>>>>
>>>> So, I'm using code such as...
>>>>
>>>> Dim backup as dmsreport =me
>>>> backup.font=newfont
>>>> backup.print
>>>> etc etc
>>>>
>>>>
>>>> I was expecting this not to change any of the parameters of my
>>>> original
>>>> object, however I find that "backup" is created simply as a
>>>> reference
>>>> to "me" and therefore "me" contains all the updates I subsequently
>>>> make
>>>> to the backup.
>>>>
>>>> How do I make a copy of the object so that I can work on the copy
>>>> without changing the original?
>>>>
>>>> Hope that this makes sense!
>>>>
>>>> Regards
>>>> Simon
>>>>
>>>
>>>
>>
>>
>
>