Re: XMLSerialization

Thank you, Craig.  Good to know.

Peter

-----Original Message-----
From: Discussion relating to the specifics of the C# and Managed C++
languages [mailto:[email protected]] On Behalf Of Craig
Vermeer
Sent: Thursday, July 19, 2007 10:30 AM
To: [email protected]
Subject: Re: [DOTNET-CX] XMLSerialization

Peter -

This doesn't really answer your question, but I thought I'd point out=20
that the SerializableAttribute you're using on the classes you want to=20
serialize isn't needed.  XmlSerializer doesn't look at this attribute...

it's a fairly common misconception, actually.

Thanks,
Craig

Peter Osucha wrote:
> 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.
>
> =20
>
> However, it doesn't seem to deserialize at all - I always get an
error.
>
> =20
>
> Perhaps someone can help me out here.  The code for the project is
> below.
>
> =20
>
> 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..
>
> =20
>
> Peter
>
> =20
>
> =20
>
> //Class MyItem...
>
> using System;
>
> using System.Collections.Generic;
>
> using System.Text;
>
> using System.Drawing;
>
> =20
>
> namespace XMLSerializationTest
>
> {
>
>     [Serializable]
>
>     public class MyItem
>
>     {
>
>         private string _name;
>
>         private int _number;
>
> =20
>
>         public MyItem ( ) { }
>
> =20
>
>         public MyItem ( string name, int number )
>
>         {
>
>             _name =3D name;
>
>             _number =3D number;
>
>         }
>
> =20
>
>         public string Name
>
>         {
>
>             get { return _name; }
>
>             set { _name =3D value; }
>
>         }
>
> =20
>
>         public int Number
>
>         {
>
>             get { return _number; }
>
>             set { _number =3D value; }
>
>         }
>
>     }
>
> }
>
> =20
>
> =20
>
> // Class MyItemHolder
>
> using System;
>
> using System.Collections.Generic;
>
> using System.Text;
>
> =20
>
> namespace XMLSerializationTest
>
> {
>
>     [Serializable]
>
>     public class MyItemHolder
>
>     {
>
>         List<MyItem> _myItems =3D new List<MyItem> ( );
>
>         private string _holderName =3D string.Empty;
>
> =20
>
>         public MyItemHolder ( ) { }
>
> =20
>
>         public string HolderName
>
>         {
>
>             get { return _holderName; }
>
>             set { _holderName =3D value; }
>
>         }
>
> =20
>
>         public List<MyItem> MyItems
>
>         {
>
>             get { return _myItems; }
>
>             set { _myItems =3D value; }
>
>         }
>
> =20
>
> =20
>
>     }
>
> }
>
> =20
>
> =20
>
> // 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;
>
> =20
>
> namespace XMLSerializationTest
>
> {
>
>     public partial class Form1 : Form
>
>     {
>
>         private MyItemHolder _holder =3D new MyItemHolder ( );
>
>         private MyItemHolder _holderRebuild;
>
>         private System.Text.StringBuilder sbHolder =3D new =
StringBuilder
(
> );
>
> =20
>
>         public Form1 ( )
>
>         {
>
>             InitializeComponent ( );
>
> =20
>
>             _holder.HolderName =3D "PMO";
>
>             for ( int i =3D 1; i < 3; i++ )
>
>             {
>
>                 _holder.MyItems.Add ( new MyItem ( "Item..." +
> i.ToString ( ), i ) );
>
>             }
>
>         }
>
> =20
>
>         private void button1_Click ( object sender, EventArgs e )
>
>         {
>
>             System.Xml.Serialization.XmlSerializer xser =3D new
> System.Xml.Serialization.XmlSerializer ( typeof ( MyItemHolder ) );
>
> =20
>
>             sbHolder =3D new StringBuilder ( );
>
>             System.IO.StringWriter sw =3D new System.IO.StringWriter (
> sbHolder );
>
>             xser.Serialize ( sw, _holder );
>
> =20
>
>             richTextBox1.Text =3D sbHolder.ToString ( );
>
>         }
>
> =20
>
>         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 ( ) );
>
> =20
>
>             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;
>
>             }
>
> =20
>
>         }
>
>     }
>
> }
>
> =20
>
> =20
>
>
> =
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