Serializing a Nullable in to XML

Question

I am trying to serialize a class several of the data-members are Nullable objects, here is a example

[XmlAttribute(\"AccountExpirationDate\")]
public Nullabl         


        

Answer 1

Define a Serializable that encapsulates your funcionality.

Here's are and example.

[XmlAttribute("AccountExpirationDate")]  
public SerDateTime AccountExpirationDate   
{   
  get { return _SerDateTime ; }   
  set { _SerDateTime = value; }   
}  


/// 

/// Serialize DateTime Class (yyyy-mm-dd)
/// 
public class SerDateTime : IXmlSerializable {
    /// 

    /// Default Constructor when time is not avalaible
    /// 
    public SerDateTime() { }
    /// 

    /// Default Constructor when time is avalaible
    /// 
    /// 
    public SerDateTime(DateTime pDateTime) {
        DateTimeValue = pDateTime;
    }

    private DateTime? _DateTimeValue;
    /// 

    /// Value
    /// 
    public DateTime? DateTimeValue {
        get { return _DateTimeValue; }
        set { _DateTimeValue = value; }
    }

    // Xml Serialization Infrastructure
    void IXmlSerializable.WriteXml(XmlWriter writer) {
        if (DateTimeValue == null) {
            writer.WriteString(String.Empty);
        } else {
            writer.WriteString(DateTimeValue.Value.ToString("yyyy-MM-dd"));
            //writer.WriteString(SerializeObject.SerializeInternal(DateTimeValue.Value));
        }
    }

    void IXmlSerializable.ReadXml(XmlReader reader) {
        reader.ReadStartElement();
        String ltValue = reader.ReadString();
        reader.ReadEndElement();
        if (ltValue.Length == 0) {
            DateTimeValue = null;
        } else {                
            //Solo se admite yyyyMMdd
            //DateTimeValue = (DateTime)SerializeObject.Deserialize(typeof(DateTime), ltValue);
            DateTimeValue = new DateTime(Int32.Parse(ltValue.Substring(0, 4)),
                                Int32.Parse(ltValue.Substring(5, 2)),
                                Int32.Parse(ltValue.Substring(8, 2)));                                    
        }
    }

    XmlSchema IXmlSerializable.GetSchema() {
        return (null);
    }
}
#endregion