How to Deserialize xml to an array of objects?

Question

I am tryind to deserialize a xml file into an object[] - the object is a rectangle with the following fields

public class Rectangle : IXmlSerializable
{
    public string Id { get; set; }
    public Point TopLeft { get; set; }
    public Point BottomRight { get; set; }
    public RgbColor Color { get; set; }
}

I created several rectangles, saved them into an array and managed to serialize them into the xml i get the following syntax:

<?xml version="1.0" encoding="utf-8" ?> 
- <Rectangles>
 - <Rectangle>
    <ID>First one</ID> 
  - <TopLeft>
    <X>0.06</X> 
    <Y>0.4</Y> 
    </TopLeft>
  - <BottomRight>
    <X>0.12</X> 
    <Y>0.13</Y> 
    </BottomRight>
  - <RGB_Color>
    <Blue>5</Blue> 
    <Red>205</Red> 
    <Green>60</Green> 
    </RGB_Color>
  </Rectangle>

-

Now i want to deserialize the rectangle objects back into a new rectangle[] how should i do it?

XmlSerializer mySerializer = new XmlSerializer(typeof(Rectangle));
        FileStream myFileStream = new FileStream("rectangle.xml", FileMode.Open);
        Rectangle[] r = new Rectangle[] {};
        Rectangle rec;
        for (int i = 0; i < 3; i++)
        {
            r[i] = (Rectangle) mySerializer.Deserialize(myFileStream);
        }

i get a InvalidOperationException - {"There is an error in XML document (1, 40)."} what am i doing wrong?

Thank you

Your Rectangles xml tag is not ended. Is this a typo?

Daniel May
– Daniel May

2011-09-24 21:04:32 +00:00
Commented Sep 24, 2011 at 21:04 — Daniel May
– Daniel May, Commented Sep 24, 2011 at 21:04

Setyo N · Accepted Answer · 2011-09-26 00:51:25Z

9

If your XML document is valid, you should be able to use this codes to deserialize it:

  XmlSerializer mySerializer = new XmlSerializer( typeof( Rectangle[] ), new XmlRootAttribute( "Rectangles" ) );
  using ( FileStream myFileStream = new FileStream( "rectangle.xml", FileMode.Open ) )
  {
    Rectangle[] r;
    r = ( Rectangle[] ) mySerializer.Deserialize( myFileStream );
  }

edited Sep 26, 2011 at 0:51

answered Sep 25, 2011 at 1:06

Setyo N

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1 Comment

John Saunders Over a year ago

If you'll put your FileStream into a using block, then I'll upvote your answer.

Kiley Naro · Accepted Answer · 2011-09-24 21:04:26Z

1

Your XML is missing a closing </Rectangles> element. That might be the problem!

answered Sep 24, 2011 at 21:04

Kiley Naro

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Comments

Göktürk Solmaz · Accepted Answer · 2011-09-24 21:14:37Z

1

The problem is about root element name.

However, Deserialize( ) only knows how to look for an element named Rectangles. But in your case element named "Rectangle". that is all the InvalidOperationException is telling you.

answered Sep 24, 2011 at 21:14

Göktürk Solmaz

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