Serialization Collections?

Hi

Is it possible to serialize collections variables?

I get the following error on
oBinaryFormatter.Serialize(oFileStream, _oCollection)


variables are declare like
Dim oBinFormatter As BinaryFormatter
Dim oFileStream As FileStream
Dim _oCollection As Collection = New Collection()

An unhandled exception of type 'System.Runtime.Serialization.SerializationException' occurred in mscorlib.dll

Additional information: The type Microsoft.VisualBasic.Collection in Assembly Microsoft.VisualBasic, Version=7.0.3300.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a is not marked as serializable.

The collection object is not serializeable so no. You'd have to create a custom collection that is serializable or loop through the collection and serialize each individual object instead.

Thanks but im still having problems....


I get the following error

n unhandled exception of type 'System.Runtime.Serialization.SerializationException' occurred in mscorlib.dll

Additional information: The type WindowsApplication1.Form1+mystruct in Assembly WindowsApplication1, Version=1.0.1147.39837, Culture=neutral, PublicKeyToken=null is not marked as serializable.

VB Code:

Structure mystruct
        Dim Header() As String
        Dim Data() As Byte
    End Structure
 
    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        Dim struct(10) As mystruct
        Dim h(5) As String
        Dim d(10) As Byte
 
        '-- Data 1
        h(0) = "Header 1"
        h(2) = "Header 2"
        h(3) = "Header 3"
        d(0) = Asc("W")
        d(1) = Asc("O")
        d(2) = Asc("R")
        d(3) = Asc("K")
        d(4) = Asc("!")
 
        '-- Add Data 1 to struct
        struct(0).Header = h
        struct(0).Data = d
 
 
        '-- Data 2
        h(0) = "Header 4"
        h(2) = "Header 5"
        h(3) = "Header 6"
        d(0) = Asc("N")
        d(1) = Asc("O")
        d(2) = Asc("W")
        d(3) = Asc("!")
 
        '-- Add Data 1 to struct
        struct(1).Header = h
        struct(1).Data = d
 
        Dim oFileStream As IO.FileStream
        Dim oBinaryFormatter As Runtime.Serialization.Formatters.Binary.BinaryFormatter = New Runtime.Serialization.Formatters.Binary.BinaryFormatter()
 
        oFileStream = IO.File.Create("c:\b.txt")
        oBinaryFormatter.Serialize(oFileStream, struct)
        oFileStream.Close()

My data is structered like above ( but mass amounts of it ), and i just want to easily serialize the lot into a file, but i cant due to that error.

Am i doing this wrong?

You need to add the serializable attribute to your struct, like this

VB Code:

<serializable()> Structure mystruct
        Dim Header() As String
        Dim Data() As Byte
    End Structure