Object serialization

[simluk]

Hi,

i have some problems saving objects to binary file using serialization. Maybe i will just give some source code from my project and then try to explain the problem.

   [Serializable()]
	public class ObjectRefId : ISerializable
	{
       public ObjectRefId(SerializationInfo objSerializationInfo, StreamingContext objStreamingContext)
      {
         //Retrieve the data of the fields from the SerializationInfo class and
         //set the values into the respective fields.
      }

      [SecurityPermissionAttribute(SecurityAction.Demand, SerializationFormatter = true)]
      public void GetObjectData(SerializationInfo objSerializationInfo, StreamingContext objStreamingContext)
      {
         //Add the fields to be saved into the SerializationInfo class.
         //Provide a name for each field being saved.
      }
	}

      public int LoadFromStorage()
      {
         String sName = "My3rdPartyStream";
         try
         {
            object obj = document.IGet3rdPartyStorage(sName, false);
            if (obj != null)
            {
               UCOMIStream ucomiStr = (UCOMIStream)obj;
               ComStream comStream = new ComStream(ref ucomiStr);
               comStream.Seek(0, SeekOrigin.Begin);

               BinaryFormatter formatter = new BinaryFormatter();
               comStream.Seek(0, SeekOrigin.Begin);
               objRefId = (ObjectRefId)formatter.Deserialize(comStream);
               comStream.Close();
            }
         }
         catch(Exception ex)
         {
            iSwApp.SendMsgToUser2(ex.Message, (int)swMessageBoxIcon_e.swMbWarning, (int)swMessageBoxBtn_e.swMbOk);
         }

         document.IRelease3rdPartyStorage(sName);

         return 0;
      }

      public int SaveToStorage()
      {
         String sName = "My3rdPartyStream";
         try
         {
            object obj = document.IGet3rdPartyStorage(sName, true);
            if (obj != null)
            {
               UCOMIStream ucomiStr = (UCOMIStream)obj;
               ComStream comStream = new ComStream(ref ucomiStr);
               BinaryFormatter formatter = new BinaryFormatter();
               formatter.Serialize(comStream, objRefId);
               comStream.Close();
            }
         }
         catch(Exception ex)
         {
            iSwApp.SendMsgToUser2(ex.Message, (int)swMessageBoxIcon_e.swMbWarning, (int)swMessageBoxBtn_e.swMbOk);
         }

         document.IRelease3rdPartyStorage(sName);

         return 0;
      }
	}

I am developing addin application and i get notifications from host application when it saves and loads its file. I can use this notification to save my own objects within the host application files. If i try to save one of the base objects (like Hashtable) that implements ISeriazible interface, then everything works just fine. If i try to use my own objects that also implements ISeriazible interface, then i get an exception on Deserialize (BinaryFormatter) method. The message text is smth like:
"Cannot find the assembly MyAssemblyTest, Version.. "
At first i thougt that this could happen because my assembly is not "strog named", but i dont really understand how to make it "strong named" assembly..
Any help would be appreciated

[hansipet]

I don't know why you get this exception. It is never happened to me. But I'm sure that you don't need a strong named assembly (I don't have too a strong assembly and it works also...

Regards
Hansjörg

[hansipet]

Have you tested already to write it to your own file?
regards
Hansjörg

[simluk]

Have you tested already to write it to your own file?
regards
Hansjörg

yep, tryed that already.. same exception is thrown
maybe my assembly info is incorrect - something with versioning???

[hansipet]

If it is not a to big work, test to make a new project and insert there the relevant files. Maybe this helps...
Regards
Hansjörg

[simluk]

If it is not a to big work, test to make a new project and insert there the relevant files. Maybe this helps...
Regards
Hansjörg

I have created test console application, where i tryed to serialize that object. Everything worked fine. Hmm..
Maybe these methods could cause problems in my addin (the code was generated by addin wizard)

 		[ComRegisterFunctionAttribute]
		public static void RegisterFunction(Type t)
		{
                 ...
                }

		[ComUnregisterFunctionAttribute]
		public static void UnregisterFunction(Type t)
		{
                 ...
                }

i wonder, what these registration functions do.. ??

[hansipet]

Maybe you can test to add to this methods

[field:NonSerializedAttribute()]

or
[NonSerializedAttribute]

I'm not sure if this helps...if not the only way is to implement the ISerializable attribute

Regards
Hansjörg