Hi,
I am trying to serialize a data structure -- a list (of custom class)
-- in one application, then read it in with another application. My
serialize and deserialize subs are in a module that is shared between
the two applications, so they are using exactly the same code (this
module also contains the class, so I am certain the class code is the
same)

The code I'm using is quite simple, so I'm not sure where I'm going
wrong:

Private AllOrders as List (Of CustomOrder)

Function SerializeOrders(ByVal Path As String) As Integer
'Writes (serializes) All Orders to disk at given path
Dim myFileStream As New System.IO.FileStream(Path,
System.IO.FileMode.Create)
Dim MyFormatter As New
System.Runtime.Serialization.Formatters.Binary.BinaryFormatter()

If (AllOrders IsNot Nothing) Then
MyFormatter.Serialize(myFileStream, AllOrders)
End If
myFileStream.Close()
End Function

Function DeserializeOrders(ByVal path As String) As Integer
' Reads list of orders from given path and OVERWRITES AllOrders
Dim myFileStream As New System.IO.FileStream(path,
System.IO.FileMode.OpenOrCreate)
Dim MyFormatter As New
System.Runtime.Serialization.Formatters.Binary.BinaryFormatter()

Dim GenericObject As Object
Try
GenericObject = MyFormatter.Deserialize(myFileStream)
AllOrders = CType(GenericObject, List(Of TEOrder))
Catch ex As Exception
Finally
myFileStream.Close()
End Try
End Function

No exception is ever raised. When I serialize, I can check the file
and it contains data (which means that serialization is working).
However, when I deserialize in the other application, I get 0 objects.

A final observation: serialization & deserialization work fine when
done within the same application. It is only between applications
that I have the problem.

Help?

BTW I would be interested in using the SOAPFormatter but I can't find
it in VB.NET. I read about it online but don't see it available.
What do I need to do to make that available to me? (I would much
prefer human-readable output when I serialize)

Thanks,
Marc

Try posting the exception instead of catching and hiding them.

Schneider

"Marc" <(E-Mail Removed)> wrote in message
news:(E-Mail Removed)...
> Hi,
> I am trying to serialize a data structure -- a list (of custom class)
> -- in one application, then read it in with another application. My
> serialize and deserialize subs are in a module that is shared between
> the two applications, so they are using exactly the same code (this
> module also contains the class, so I am certain the class code is the
> same)
>
> The code I'm using is quite simple, so I'm not sure where I'm going
> wrong:
>
> Private AllOrders as List (Of CustomOrder)
>
> Function SerializeOrders(ByVal Path As String) As Integer
> 'Writes (serializes) All Orders to disk at given path
> Dim myFileStream As New System.IO.FileStream(Path,
> System.IO.FileMode.Create)
> Dim MyFormatter As New
> System.Runtime.Serialization.Formatters.Binary.BinaryFormatter()
>
> If (AllOrders IsNot Nothing) Then
> MyFormatter.Serialize(myFileStream, AllOrders)
> End If
> myFileStream.Close()
> End Function
>
> Function DeserializeOrders(ByVal path As String) As Integer
> ' Reads list of orders from given path and OVERWRITES AllOrders
> Dim myFileStream As New System.IO.FileStream(path,
> System.IO.FileMode.OpenOrCreate)
> Dim MyFormatter As New
> System.Runtime.Serialization.Formatters.Binary.BinaryFormatter()
>
> Dim GenericObject As Object
> Try
> GenericObject = MyFormatter.Deserialize(myFileStream)
> AllOrders = CType(GenericObject, List(Of TEOrder))
> Catch ex As Exception
> Finally
> myFileStream.Close()
> End Try
> End Function
>
> No exception is ever raised. When I serialize, I can check the file
> and it contains data (which means that serialization is working).
> However, when I deserialize in the other application, I get 0 objects.
>
> A final observation: serialization & deserialization work fine when
> done within the same application. It is only between applications
> that I have the problem.
>
> Help?
>
> BTW I would be interested in using the SOAPFormatter but I can't find
> it in VB.NET. I read about it online but don't see it available.
> What do I need to do to make that available to me? (I would much
> prefer human-readable output when I serialize)
>
> Thanks,
> Marc
>

On Apr 16, 9:14 am, "Marc" <newmexicoguacam...@gmail.com> wrote:
> Hi,
> I am trying to serialize a data structure -- a list (of custom class)
> -- in one application, then read it in with another application. My
> serialize and deserialize subs are in a module that is shared between
> the two applications, so they are using exactly the same code (this
> module also contains the class, so I am certain the class code is the
> same)

What does this mean, exactly? Have you placed your serialization code
in a class library and both applications reference that library? Or do
both applications simply share the same code file? If they share the
same code file, then that is likely your problem. Even if they have
identical code, the classes are still considered different types and
the second application will not be able to deserialize the file that
is serialized by the first.

<snip>

> Try
> GenericObject = MyFormatter.Deserialize(myFileStream)
> AllOrders = CType(GenericObject, List(Of TEOrder))
> Catch ex As Exception
> Finally
> myFileStream.Close()
> End Try
> End Function
>
> No exception is ever raised. When I serialize, I can check the file

As the other poster pointed out, you are catching and swallowing the
exception.

>
> BTW I would be interested in using the SOAPFormatter but I can't find
> it in VB.NET. I read about it online but don't see it available.
> What do I need to do to make that available to me? (I would much
> prefer human-readable output when I serialize)

The SoapFormatter is defined in the
System.Runtime.Serialization.Formatters.Soap namespace which is
contained, coincidentally, in
System.Runtime.Serialization.Formatters.Soap.dll. Add a reference to
that assembly and you can get at the SoapFormatter.

Chris

On Apr 17, 8:36 am, Chris Dunaway <dunaw...@gmail.com> wrote:
> On Apr 16, 9:14 am, "Marc" <newmexicoguacam...@gmail.com> wrote:
>
> > Hi,
> > I am trying to serialize a data structure -- a list (of custom class)
> > -- in one application, then read it in with another application. My
> > serialize and deserialize subs are in a module that is shared between
> > the two applications, so they are using exactly the same code (this
> > module also contains the class, so I am certain the class code is the
> > same)
>
> What does this mean, exactly? Have you placed your serialization code
> in a class library and both applications reference that library? Or do
> both applications simply share the same code file? If they share the
> same code file, then that is likely your problem. Even if they have
> identical code, the classes are still considered different types and
> the second application will not be able to deserialize the file that
> is serialized by the first.
>
> <snip>
>
> > Try
> > GenericObject = MyFormatter.Deserialize(myFileStream)
> > AllOrders = CType(GenericObject, List(Of TEOrder))
> > Catch ex As Exception
> > Finally
> > myFileStream.Close()
> > End Try
> > End Function
>
> > No exception is ever raised. When I serialize, I can check the file
>
> As the other poster pointed out, you are catching and swallowing the
> exception.
>
>
>
> > BTW I would be interested in using the SOAPFormatter but I can't find
> > it in VB.NET. I read about it online but don't see it available.
> > What do I need to do to make that available to me? (I would much
> > prefer human-readable output when I serialize)
>
> The SoapFormatter is defined in the
> System.Runtime.Serialization.Formatters.Soap namespace which is
> contained, coincidentally, in
> System.Runtime.Serialization.Formatters.Soap.dll. Add a reference to
> that assembly and you can get at the SoapFormatter.
>
> Chris

Thanks Chris (and Schneider)

I decided to investigate the exceptions a little more and realized
that because I was simply using two copies of the same class files,
the namespaces were not shared and I could not share objects. Thus I
have created a class library which is used by both applications now,
and I am gleefully sharing objects.

(Then I checked the newgroup and found Chris's reply, which would have
saved me a lot of time if it had come a few hours earlier!)

Also thanks for the SoapFormatter information.

Regards,
Marc