Round values on serialization when using XmlSerializer to serialize to an XML string

Question

I'm using XmlSerializer to serialize my object model to XML. At the moment just prior to serilization I'm recusively going through my entire model and rounding any values to 1 or 2 decimal places depending on some property.

Is there a way to do this by subclassing the XmlSerializer. I tried overriding the protected override void Serialize(object o, XmlSerializationWriter writer) method but it is never called.

Here is my block of code that does the serialisation:

 StringWriter writer = new Utf8StringWriter();

 XmlWriter xml = XmlWriter.Create(writer, new XmlWriterSettings() { Encoding = writer.Encoding });

 new MySubClassSerializer(engine.GetType()).Serialize(xml, engine);

My subclassed serializer does not do anything at the moment just subclasses to it's parent.

Answer 1

What if you wrapped these values in another property? Like this:

[XmlIgnore()]
public float SomeValue { get; set; }

[XmlAttribute("SomeValue")]
public float SomeValueRounded
{
    get { return (float)Math.Round(SomeValue, 2); }
    set { SomeValue = value; }
}