Serialization Problem (ViewState)

[bri189a]

I have the following class (originally a struct, but wasn't working so changed to class, but still not working). I am saving and trying to pull from ViewState - before adding Serialization attribute had the 'must be Serializable error', so added the attirbute and interface and followed the help files. Still when saving to view state and pulling back out I get 'Nothing' as the value and the special serialization constructor and GetObjectData methods are never called. Haven't had to mess with serialization up until now, so not sure where to go from here.

 

What am I doing wrong.

 

Thanks!

 

<Serializable()> _
Public NotInheritable Class TimePeriod
	Implements ISerializable

	Private _month, _year As String
	Public Property Month() As String
		Get
			Return _month
		End Get
		Set(ByVal Value As String)
			_month = Value
		End Set
	End Property
	Public Property Year() As String
		Get
			Return _year
		End Get
		Set(ByVal Value As String)
			_year = Value
		End Set
	End Property

	Public Sub New(ByVal m As String, ByVal y As String)
		Month = m
		Year = y
	End Sub

	Public Sub New(ByVal info As SerializationInfo, ByVal context As StreamingContext)
		Dim m As String = DirectCast(info.GetValue("Month", GetType(String)), String)
		Dim y As String = DirectCast(info.GetValue("Year", GetType(String)), String)
		If Not m Is Nothing AndAlso Not y Is Nothing Then
			Month = m
			Year = y
		Else
			Month = "1"
			Year = "1900"
		End If
	End Sub

	Public Sub GetObjectData(ByVal info As System.Runtime.Serialization.SerializationInfo, _
	   ByVal context As System.Runtime.Serialization.StreamingContext) _
	   Implements System.Runtime.Serialization.ISerializable.GetObjectData
		info.AddValue("Month", Month, GetType(String))
		info.AddValue("Year", Year, GetType(String))
	End Sub
End Class

[Diesel]

Can you show your serialization and deserialization code?

 

Don't you need an empty public constructor to serialize?

[bri189a]

The code is above, all you should need according to MSDN is what is above. If you've done it another way, let me see how you code it and maybe I'll see what I'm missing.

 

Thanks.