How to use .NET XML serialization to serialize an object to a single value

Question

Assuming I have the following:

[Serializable]
public class Foo
{
    public Bar bar
    {
        get;
        set;
    }

    public Ram ram
    {
        get;
        set;
    }
}

[Serializable]
public class Bar
{
    [XmlElement("barId")]
    public int Id
    {
        get;
        set;
    }
}

[Serializable]
public class Ram
{
    [XmlElement("ramId")]
    public int RamId
    {
        get;
        set;
    }
}

I would like to serialize to XML as:

<Foo>
    <barId>123</barId>
    <ramId>234</ramId>
</Foo>

What is the best way to do this?

I think I will have to create an intermediary class to serialize. Alternatives?

Nicholas Carey · Accepted Answer · 2011-04-20T00:23:55.730

You mean like this?

using System.Text;
using System.Xml;
using System.Xml.Serialization ;

namespace ConsoleApplication11
{

  [XmlRoot("Foo")]
  public class Foo
  {
    public Foo()
    {
      bar = new Bar() ;
      ram = new Ram() ;
    }

    [XmlElement("barId")]
    public Bar bar { get; set; }

    [XmlElement("ramId")]
    public Ram ram { get; set; }

  }

  public class Bar
  {
    [XmlText]
    public int Id { get; set; }
  }

  public class Ram
  {
    [XmlText]
    public int RamId { get; set; }
  }

  class Program
  {

    static int Main( string[] argv )
    {
      XmlSerializer xml = new XmlSerializer( typeof(Foo) ) ;
      XmlWriterSettings settings = new XmlWriterSettings() ;

      settings.Indent = true ;
      settings.IndentChars = "  " ;
      settings.Encoding = new UnicodeEncoding( false , false ) ; // little-endian, omit byte order mark
      settings.OmitXmlDeclaration = true ;

      Foo instance = new Foo() ;
      instance.bar.Id = 1234 ;
      instance.ram.RamId = 9876 ;

      StringBuilder sb = new StringBuilder() ;
      using ( XmlWriter writer = XmlWriter.Create( sb , settings ) )
      {
        xml.Serialize(writer, instance ) ;
      }
      string xmlDoc = sb.ToString() ;

      Console.WriteLine(xmlDoc) ;

      return 0;
    }

  }

}

+1 - it might be worth moving the crux of your answer (the `XmlTextAttribute`) up out of the massive scroll area. — Jeff Sternal, Apr 20 '11 at 00:15
+1 - this works, but some explanation of why would be helpful. — Odrade, Apr 20 '11 at 00:19

score 0 · Answer 2 · edited May 23 '17 at 11:55

0

Use the XmlSerializer. This question is similar to yours and has some helpful answers: Using StringWriter for XML Serialization

edited May 23 '17 at 11:55

Community

1
1

answered Apr 20 '11 at 00:07

Kon

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score 0 · Answer 3 · answered Apr 20 '11 at 00:08

I guess you could do something like this:

[Serializable]
public class Foo
{
private Bar _bar;

    public int BarID
    {
        get { return _bar.Id;}
        set 
        {
             if (_bar==null) _bar= new Bar();

             _bar.Id = id;
       }
    }

}

though i feel i should add that it sounds a bit misguided... why would you want to do this?

score 0 · Answer 4 · answered Apr 20 '11 at 00:10

Mark Bar and Ram with attributes to prevent serialization, add public properties that expose the ids instead, have BarId's get return null if Bar is null, Bar.Id elsewise. Have the set either load existing Bar by id or create new one (according to your BL). Same for Ram.

How to use .NET XML serialization to serialize an object to a single value

4 Answers4