XMLSerialization

I have been playing around with this again as a way to import/export
some objects.  It seems to work pretty well (I'm just marking the
classes as [Serializable] for now).  I have had no trouble serializing a
simple class as well as a simple List<>.  The I combined them so that I
had a simple class with a List<> in side of It and it still seems to
have serialized OK.

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However, it doesn't seem to deserialize at all - I always get an error.

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Perhaps someone can help me out here.  The code for the project is
below.

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There is a class MyItem with two properties.  There is a class
MyItemHolder with a two properties, one being a List<MyItem>.  Then
there is a form with two buttons on it, one to serialize, the second to
deserialize and a richtextbox to show results..

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Peter

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//Class MyItem...

using System;

using System.Collections.Generic;

using System.Text;

using System.Drawing;

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namespace XMLSerializationTest

{

    [Serializable]

    public class MyItem

    {

        private string _name;

        private int _number;

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        public MyItem ( ) { }

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        public MyItem ( string name, int number )

        {

            _name =3D name;

            _number =3D number;

        }

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        public string Name

        {

            get { return _name; }

            set { _name =3D value; }

        }

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        public int Number

        {

            get { return _number; }

            set { _number =3D value; }

        }

    }

}

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// Class MyItemHolder

using System;

using System.Collections.Generic;

using System.Text;

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namespace XMLSerializationTest

{

    [Serializable]

    public class MyItemHolder

    {

        List<MyItem> _myItems =3D new List<MyItem> ( );

        private string _holderName =3D string.Empty;

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        public MyItemHolder ( ) { }

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        public string HolderName

        {

            get { return _holderName; }

            set { _holderName =3D value; }

        }

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        public List<MyItem> MyItems

        {

            get { return _myItems; }

            set { _myItems =3D value; }

        }

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    }

}

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// Form code (a richtext box to show results, button1 to serialize,
button2 to deserialize)

using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Text;

using System.Windows.Forms;

using System.Xml;

using System.Xml.Serialization;

using System.IO;

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namespace XMLSerializationTest

{

    public partial class Form1 : Form

    {

        private MyItemHolder _holder =3D new MyItemHolder ( );

        private MyItemHolder _holderRebuild;

        private System.Text.StringBuilder sbHolder =3D new StringBuilder =
(
);

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        public Form1 ( )

        {

            InitializeComponent ( );

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            _holder.HolderName =3D "PMO";

            for ( int i =3D 1; i < 3; i++ )

            {

                _holder.MyItems.Add ( new MyItem ( "Item..." +
i.ToString ( ), i ) );

            }

        }

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        private void button1_Click ( object sender, EventArgs e )

        {

            System.Xml.Serialization.XmlSerializer xser =3D new
System.Xml.Serialization.XmlSerializer ( typeof ( MyItemHolder ) );

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            sbHolder =3D new StringBuilder ( );

            System.IO.StringWriter sw =3D new System.IO.StringWriter (
sbHolder );

            xser.Serialize ( sw, _holder );

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            richTextBox1.Text =3D sbHolder.ToString ( );

        }

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        private void button2_Click ( object sender, EventArgs e )

        {

            System.Xml.Serialization.XmlSerializer xser =3D new
System.Xml.Serialization.XmlSerializer ( typeof ( List<MyItem> ) );

            System.IO.StringReader sr =3D new System.IO.StringReader (
sbHolder.ToString ( ) );

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            try

            {

                _holderRebuild =3D ( MyItemHolder )xser.Deserialize ( sr
);

                richTextBox1.Text =3D string.Format ( "Name: {0}, Item
count: {1}", _holderRebuild.HolderName,
_holderRebuild.MyItems.Count.ToString ( ) );

            }

            catch ( Exception ex )

            {

                string errorText =3D ex.Message;

                if ( ex.InnerException !=3D null ) errorText =3D =
errorText +
"(" +  ex.InnerException.Message + ")";

                richTextBox1.Text =3D errorText;

            }

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        }

    }

}

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