[Mono-list] problems with SerializationBinder

[Lluis Sanchez]

Hi,

SerializationBinder support is not yet implemented in the BinaryFormatter.
I'll try to do it in the following days. It looks easy to do.

Lluis.

----- Original Message -----
From: "Ishpal Singh" <ishpal.singh@aeye.net>
To: <mono-list@lists.ximian.com>
Sent: Tuesday, February 18, 2003 11:39 PM
Subject: [Mono-list] problems with SerializationBinder


> Hi guys,
>
> A brief report reagrding the BinaryFormatter/Serialization which can be
> helpful to you guys.
> Thought I'd mail the bug (if I am not doing anything wrong :)). It might
> help a few.
>
> I am trying to work with the deserialization with mono.
> Passing a structure from a windows application running dotNet to the linux
> box running mono and try to recover the same object on the linux machine.
> It seems to transfer the data fine, but then it checks for the header of
the
> serialized structure and finds the assembly name in which the structure
was
> originally serialized.
> Now, since the two applications are different, the assembly names are also
> obviously different and so while deserializing it complains for the
assembly
> names. (refer http://msdn.microsoft.com/msdnmag/issues/02/09/net/ )
> To work around I wrote another class called the
> 'AssmNameChangeDeserializationBinder'. The purpose of this binder is to
> replace the assembly name when it reaches the other application.
> It works fine if both the applications are on windows, but fails if one of
> the application is on MONO. MONO doesnt seem to invoke this class to
change
> the assembly name while deserializing.
> I think this needs to be fixed.
>
> -----------------------------------------------
> using System;
> namespace cmsStruct
> {
> [Serializable()]
> public struct test
> {
> public int a;
> public string b;
> }
> }
> -----------------------------------------------
>
> MemoryStream ms = new MemoryStream(b);
> BinaryFormatter bf1 = new BinaryFormatter();
> ms.Position = 0;
> bf1.Binder = new AssmNameChangeDeserializationBinder();
>
> cmsStruct.test t = (cmsStruct.test) bf1.Deserialize(ms);
>
> --------------------------------------------------------------------
>
> sealed class AssmNameChangeDeserializationBinder :
> System.Runtime.Serialization.SerializationBinder
> {
> public override Type BindToType( string assemblyName, string typeName)
> {
>
> Console.WriteLine("in Bind to type...");
>
> Type typeToDeserialize = null;
>
> // For each assemblyName/typeName that you wish to deserialize
> // to a different type, set typeToCreate to the desired type
> String assemVer1 = "TransferStructData, Version=1.0.0.0, " +
> "Culture=neutral, PublicKeyToken=b77a5c561934e089";
> String typeVer1 = "cmsStruct.test";
>
> Console.WriteLine("assemblyName={0}", assemblyName);
>
> if (assemblyName.IndexOf( "TransferStructData") != -1)// && typeName ==
> typeVer1)
> {
> assemblyName = assemblyName.Replace("TransferStructData",
> "dotNetServer");
> }
>
> // To return the type, do this:
> typeToDeserialize = Type.GetType(String.Format("{0}, {1}",
> typeName, assemblyName));
>
> return typeToDeserialize;
> }
> }
>
>
> ------------------------------------------------------------------
>
> WORAROUND TO GET IT GOING ON MONO
> ---------------------------------
> I had to change the name of the assembly while serializing the structure,
> after inheriting it from ISerializable as the following code shows.
> The code with following structure to transfer data works on both windows
and
> mono.
> And no need to use the Binder to chahge the name of the Assembly at the
time
> of deserialization.
>
> using System;
> using System.IO;
> using System.Runtime.Serialization;
>
> namespace cmsStruct
> {
> [Serializable()]
> public struct test : ISerializable
> {
> public int a;
> public string b;
>
> //Deserialization constructor.
> public test (SerializationInfo info, StreamingContext context)
> {
> a = (int)info.GetValue("a", typeof(int));
> b = (String)info.GetValue("b", typeof(string));
> }
>
>
> public void GetObjectData(SerializationInfo info, StreamingContext
> context)
> {
> info.AddValue("a", a);
> info.AddValue("b", b);
> info.AssemblyName = "dotNetServer";
> }
> }
> }
> -------------------------------------
>
>
> Please let me know incase someone needs some more information or if I am
> creating confusions.
>
>
> Best Regards,
> Ishpal Singh.
>
> System Analyst
> R&D
> Aeye Ltd
>
> Information contained in this email is confidential and is intended only
> for the recipient. (c) Aeye Ltd, Aeye.biz, 2003.
>
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