Hi

am trying to find a way to backward support serialized files of older version

Example:
Given a class

class MyClass
{
int a;
int b;
}

Serialize MyClass using SoapFormatter to myclass.bin

add int c; to MyClass

class MyClass
{
int a;
int b;
int c;//newly added
}

If i deserialize using SoapFormatter now from myclass.bin (created before
adding int c)... exception will thrown..

is there anyway to support 'older' version of serialized soap files besides
manually parsing it?

many thanks
tham

In .NET 1.1 you can't (well there's a trick, keep reading).
In .NET 2.0 Soapformatter you're out of luck, BinaryFormatter will work
using an new OptionalAttribute.

You can get this behavior by implementing ISerialization in .NET 1.1 and use
reflection to read stuff out of the SerializationInfo info variable.

- Sahil Malik
http://dotnetjunkies.com/weblog/sahilmalik


"tham" <(E-Mail Removed)> wrote in message
newsE4F518A-34C5-4EDD-A7E5-(E-Mail Removed)...
> Hi
>
> am trying to find a way to backward support serialized files of older
version
>
> Example:
> Given a class
>
> class MyClass
> {
> int a;
> int b;
> }
>
> Serialize MyClass using SoapFormatter to myclass.bin
>
> add int c; to MyClass
>
> class MyClass
> {
> int a;
> int b;
> int c;//newly added
> }
>
> If i deserialize using SoapFormatter now from myclass.bin (created before
> adding int c)... exception will thrown..
>
> is there anyway to support 'older' version of serialized soap files
besides
> manually parsing it?
>
> many thanks
> tham

Sorry that was ISerializable.


"Sahil Malik" <(E-Mail Removed)> wrote in message
news:%(E-Mail Removed)...
> In .NET 1.1 you can't (well there's a trick, keep reading).
> In .NET 2.0 Soapformatter you're out of luck, BinaryFormatter will work
> using an new OptionalAttribute.
>
> You can get this behavior by implementing ISerialization in .NET 1.1 and
> use
> reflection to read stuff out of the SerializationInfo info variable.
>
> - Sahil Malik
> http://dotnetjunkies.com/weblog/sahilmalik
>
>
> "tham" <(E-Mail Removed)> wrote in message
> newsE4F518A-34C5-4EDD-A7E5-(E-Mail Removed)...
>> Hi
>>
>> am trying to find a way to backward support serialized files of older
> version
>>
>> Example:
>> Given a class
>>
>> class MyClass
>> {
>> int a;
>> int b;
>> }
>>
>> Serialize MyClass using SoapFormatter to myclass.bin
>>
>> add int c; to MyClass
>>
>> class MyClass
>> {
>> int a;
>> int b;
>> int c;//newly added
>> }
>>
>> If i deserialize using SoapFormatter now from myclass.bin (created before
>> adding int c)... exception will thrown..
>>
>> is there anyway to support 'older' version of serialized soap files
> besides
>> manually parsing it?
>>
>> many thanks
>> tham
>
>