serializing non-serializable data members

[dani k]

How do I write my own serialization of a class that has
non-serializable data members?
this problem arose when I tried to serialize RSAParameters, for which
the private stuff is not serializable

[Otis Mukinfus]

On 25 Sep 2006 22:47:42 -0700, "dani k" <da*********@gm ail.comwrote:

>How do I write my own serialization of a class that has
non-serializable data members?
this problem arose when I tried to serialize RSAParameters, for which
the private stuff is not serializable

I'm afraid you can't serialize the private fields of objects you don't have the
source for, but if the private fields are exposed as properties, you might be
able to inherit from the class and serialize those properties in the derived
class.

Did I misunderstand your question?
Good luck with your project,

Otis Mukinfus
http://www.arltex.com
http://www.tomchilders.com

[coolCoder]

dani k wrote:

How do I write my own serialization of a class that has
non-serializable data members?
this problem arose when I tried to serialize RSAParameters, for which
the private stuff is not serializable

If your sole purpose is serializing all the members, you can create a
method which will save all the members of your class, may be it private
or public, to a binary or simple text file. May be you can put some
file name as parameter to this method.
Another method of your class will read some binary / text file and just
assign the value to all the members serialized from the first method.
This could be a solution for your problem.
These both methods will be public so that any instance of your class
gives access to these methods.
I think this should work for you.
It will be a tedious job once, but you can define your own format for
the file also in what format you save your data.
Hope i understood your question and am clear in my description.

Thanks !

[Dave Sexton]

Hi,

Implement ISerializable on your class. The formatter that you use for serialization will use your serialization code instead of
default serialization, which tries to serialize all members.

In your implementation of ISerializable.G etObjectData add the information that needs to be persisted. Since you can't add the
RSAParameters object to the SerializationIn fo, only add the information that is required to reconstruct the RSAParameters object
during deserialization .

A constructor on your class that takes SerializationIn fo and StreamingContex t as arguments is required for deserialization . In this
constructor, read the persisted data from the SerializationIn fo object and populate your object's fields. Read the RSAParameters
data that you persisted and construct a new instance.

HTH

--
Dave Sexton

"dani k" <da*********@gm ail.comwrote in message news:11******** **************@ i3g2000cwc.goog legroups.com...

How do I write my own serialization of a class that has
non-serializable data members?
this problem arose when I tried to serialize RSAParameters, for which
the private stuff is not serializable

[dani k]

Otis Mukinfus wrote:

On 25 Sep 2006 22:47:42 -0700, "dani k" <da*********@gm ail.comwrote:

How do I write my own serialization of a class that has
non-serializable data members?
this problem arose when I tried to serialize RSAParameters, for which
the private stuff is not serializable

I'm afraid you can't serialize the private fields of objects you don't have the
source for, but if the private fields are exposed as properties, you might be
able to inherit from the class and serialize those properties in the derived
class.

Did I misunderstand your question?
Good luck with your project,

Otis Mukinfus
http://www.arltex.com
http://www.tomchilders.com

Yes, I am afraid I didn't state the problem very well. Thanks anyway.
Anyway, I figured it out: I included an RSAParameters object as a
member in a new class that implements the ISerializable interface, and
wrote my own serialization code.
It works!
Here is the code:

public class AllSerRSAParame ters:ISerializa ble
{
private RSAParameters RSAKeyInfo;

public AllSerRSAParame ters(RSAParamet ers rhs)
{
RSAKeyInfo = rhs;
}
public AllSerRSAParame ters(Serializat ionInfo si,
StreamingContex t context)
{
RSAKeyInfo.D = (Byte[]) si.GetValue( "D", typeof(Byte[]));
RSAKeyInfo.DP = (Byte[]) si.GetValue( "DP",
typeof(Byte[]));
RSAKeyInfo.DQ = (Byte[])si.GetValue("D Q", typeof(Byte[]));
RSAKeyInfo.Expo nent = (Byte[])si.GetValue("E xponent",
typeof(Byte[]));
RSAKeyInfo.Inve rseQ = (Byte[])si.GetValue("I nverseQ",
typeof(Byte[]));
RSAKeyInfo.Modu lus = (Byte[])si.GetValue("M odulus",
typeof(Byte[]));
RSAKeyInfo.P = (Byte[])si.GetValue("P ", typeof(Byte[]));
RSAKeyInfo.Q = (Byte[])si.GetValue("Q ", typeof(Byte[]));
}

public RSAParameters GetRSAParameter s()
{
return RSAKeyInfo;
}

#region ISerializable Members

[SecurityPermiss ion(SecurityAct ion.Demand,
SerializationFo rmatter = true)]
public void GetObjectData(S erializationInf o si,
StreamingContex t context)
{
si.AddValue("D" , RSAKeyInfo.D, typeof(Byte[]));
si.AddValue("DP ", RSAKeyInfo.DP, typeof(Byte[]));
si.AddValue("DQ ", RSAKeyInfo.DQ, typeof(Byte[]));
si.AddValue("Ex ponent", RSAKeyInfo.Expo nent,
typeof(Byte[]));
si.AddValue("In verseQ", RSAKeyInfo.Inve rseQ,
typeof(Byte[]));
si.AddValue("Mo dulus", RSAKeyInfo.Modu lus, typeof(Byte[]));
si.AddValue("P" , RSAKeyInfo.P, typeof(Byte[]));
si.AddValue("Q" , RSAKeyInfo.Q, typeof(Byte[]));
}

#endregion
}