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Serialize an object into XML

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Karell Ste-Marie

Hello Folks,

I currently am at a loss on how to perform some seemingly simple object
serialization, for those that have an in-dept knowledge about the
subject I'm attempting "shallow" serialization.

I currently am able to serialize an object using this code:

Imports System.Xml
Imports System.IO
Imports System.Xml.Serialization

Public Class dummyItem
Public itemCode As String
Public itemDescription As String
End Class

Public Class pointsItemSerializable
Public item As pointsItem

Public Sub New()
item =3D New pointsItem()
End Sub

Public Function Serialize() As String
Dim x As XmlSerializer =3D New =
XmlSerializer(GetType(pointsItem))
Dim m As MemoryStream =3D New MemoryStream()
Dim functionResult As String
Dim b As Byte()
x.Serialize(m, item)
m.Position =3D 0
b =3D m.ToArray()
Dim z As Integer
functionResult =3D ""
For z =3D 1 To b.Length
functionResult =3D functionResult & Chr(b(z - 1))
Next
Return functionResult
End Function
End Class

The portion that finds a way to get to me is the deserialization of an
object, I want to avoid using a file (even a temporary one) because
these XML objects are going to be stored in a database as TEXT
datatypes. What I would really want to be able to do (if such a thing
was possible) was to give something a STRING type and get my object type
in return.

________________________
Karell Ste-Marie
C.I.O. BrainBank Inc
475 Dumont, Suite 202
Dorval, Quebec, H9S 5W2, Canada
Tel: (514) 636-6655
Fax: (514) 636-9824

Reply to this message...

John Howes

Try this (the key is first getting your string into a stream, and then
deserializing the stream data):=20

        public static object LoadObjectFromXml(System.Type type,
string xml)
        {
            if (null !=3D xml && xml.Length > 0)
            {
                MemoryStream ms =3D new MemoryStream();
                StreamWriter sw =3D new StreamWriter(ms);

                try
                {
                    sw.AutoFlush =3D true;
                    sw.Write(xml);
                    return LoadPersistedObject(type,
ms);
                }
                catch (Exception exc)
                {
                    throw new
ApplicationException("The XML could not be loaded.", exc);
                }
                finally
                {
                    sw.Close();
                    ms.Close();
                }
            }
            return null;
        }

        public static object LoadPersistedObject(System.Type
type, Stream stream)
        {
            XmlSerializer s =3D new XmlSerializer(type);

            try
            {
                stream.Position =3D 0;
                object o =3D s.Deserialize(stream);
                return o;
            }
            catch (Exception exc)
            {
                throw exc;
            }
        }

-----Original Message-----
From: Karell Ste-Marie [mailto:Click here to reveal e-mail address]=20
Sent: Monday, July 22, 2002 1:19 PM
To: aspngxml
Subject: [aspngxml] Serialize an object into XML

Hello Folks,

I currently am at a loss on how to perform some seemingly simple object
serialization, for those that have an in-dept knowledge about the
subject I'm attempting "shallow" serialization.

I currently am able to serialize an object using this code:

Imports System.Xml
Imports System.IO
Imports System.Xml.Serialization

Public Class dummyItem
Public itemCode As String
Public itemDescription As String
End Class

Public Class pointsItemSerializable
Public item As pointsItem

Public Sub New()
item =3D New pointsItem()
End Sub

Public Function Serialize() As String
Dim x As XmlSerializer =3D New =
XmlSerializer(GetType(pointsItem))
Dim m As MemoryStream =3D New MemoryStream()
Dim functionResult As String
Dim b As Byte()
x.Serialize(m, item)
m.Position =3D 0
b =3D m.ToArray()
Dim z As Integer
functionResult =3D ""
For z =3D 1 To b.Length
functionResult =3D functionResult & Chr(b(z - 1))
Next
Return functionResult
End Function
End Class

The portion that finds a way to get to me is the deserialization of an
object, I want to avoid using a file (even a temporary one) because
these XML objects are going to be stored in a database as TEXT
datatypes. What I would really want to be able to do (if such a thing
was possible) was to give something a STRING type and get my object type
in return.

________________________
Karell Ste-Marie
C.I.O. BrainBank Inc
475 Dumont, Suite 202
Dorval, Quebec, H9S 5W2, Canada
Tel: (514) 636-6655
Fax: (514) 636-9824

| [aspngxml] member Click here to reveal e-mail address =3D YOUR ID=20
| http://www.asplists.com/asplists/aspngxml.asp =3D JOIN/QUIT=20
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Reply to this message...

	System.ApplicationException
	System.IO.MemoryStream
	System.IO.StreamWriter
	System.Type
	System.Xml.Serialization.XmlSerializer

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