Deserialization of changed objects

[Urs Vogel]

Hi

Let's assume that I have an object_V1 (version 1) serialized to disk. Later,
the class for object_V1 will change to object_V2, having some more members.
Now, I would like to read my previously saved objects of type object_V1 into
object_V2, which (logically) now throws an exception.

I tried to make use of the HeaderHandler, but this gives me only access to
the methods, not the members. I also tried to inherit object_V1 into
object_V2, which didn't work either.

Is there an way to control this deserialization process, any samples around?

Any hints ar appreciated.

Thanks. Urs.

[Joe Mayo]

Re: Deserialization of changed objects



"Urs Vogel" <ursvogel@yahoo .com> wrote in message
news:Oqqp28PsDH A.2456@TK2MSFTN GP12.phx.gbl...[color=blue]
>
> Is there an way to control this deserialization process, any samples[/color]
around?[color=blue]
>[/color]

Hi Urs,

You'll need to implement ISerializable on the type you are serializing and
deserializing and control the versioning yourself.

Joe
--

http://www.csharp-station.com

[rsarosh@hotmail.com]

Deserialization of changed objects

you can deserialize the same object, if you changed the
object by adding a property, i am afraid you are going to
get a fresh and warm exception ... Lets wait and see if
some one tells otherwise ..

- Sarosh
[color=blue]
>-----Original Message-----
>Hi
>
>Let's assume that I have an object_V1 (version 1)[/color]
serialized to disk. Later,[color=blue]
>the class for object_V1 will change to object_V2, having[/color]
some more members.[color=blue]
>Now, I would like to read my previously saved objects of[/color]
type object_V1 into[color=blue]
>object_V2, which (logically) now throws an exception.
>
>I tried to make use of the HeaderHandler, but this gives[/color]
me only access to[color=blue]
>the methods, not the members. I also tried to inherit[/color]
object_V1 into[color=blue]
>object_V2, which didn't work either.
>
>Is there an way to control this deserialization process,[/color]
any samples around?[color=blue]
>
>Any hints ar appreciated.
>
>Thanks. Urs.
>
>
>.
>[/color]