C#でXmlSerializer

C#では public bool ShouldSerialize{PropName}() を実装しておくと、プロパティ化するかどうか選べる。だから例えば空文字列の場合はXMLとして書き出さないといった実装ができる。

以下は辞書データをXMLしたときの例で、色々と細かいことをしている。

[XmlRoot(ElementName = "biblio")]
public class BiblioArticle : Article
{
  [XmlElement(ElementName = "articleEntry")]
  public BookSource Article { get; set; }
}

[XmlRoot(ElementName = "link")]
public class BoljArticle : Article
{
  public class ArticleEntry
  {
    [XmlAttribute(AttributeName = "type")]
    public string Type { get; set; }

    [XmlAttribute(AttributeName = "id")]
    public string ID { get; set; }
  }
}

public class BookSource
{
  [XmlAttribute(AttributeName = "id")]
  public string ArticleID { get; set; }

  [XmlAttribute(AttributeName = "type")]
  public string ArticleType { get; set; }

  [XmlArray(ElementName = "books")]
  [XmlArrayItem(ElementName = "book")]
  public BookEntry[] Entries { get; set; }
}

public class BookEntry
{
  [XmlAttribute(AttributeName = "bookId")]
  public string ID { get; set; }

  [XmlElement(ElementName = "title")]
  public BookTitle Title { get; set; }

  [XmlArray(ElementName = "authors")]
  [XmlArrayItem(ElementName = "author")]
  public BookAuthor[] Authors { get; set; }

  [XmlElement(ElementName = "publisher")]
  public string Publisher { get; set; }

  [XmlElement(ElementName = "publishedDate")]
  public YearMonth Date { get; set; }

  public bool ShouldSerializeDate()
  {
    return Date != null;
  }

  [XmlElement(ElementName = "bookNumber")]
  public BookNumber BookNumber { get; set; }

  [XmlAttribute(AttributeName = "isKids")]
  public bool IsKids { get; set; }

  public bool ShouldSerializeIsKids()
  {
    return IsKids;
  }

  [XmlAttribute(AttributeName = "dispOrder")]
  public int DisplayOrder { get; set; }
}

public class BookTitle
{
  [XmlText]
  public string Title { get; set; }

  [XmlAttribute(AttributeName = "ruby")]
  public string Ruby { get; set; }

  public bool ShouldSerializeTitle()
  {
    return !string.IsNullOrEmpty(Ruby);
  }
}

public class YearMonth
{
  [XmlElement(ElementName= "year")]
  public int Year { get; set; }

  [XmlIgnore]
  public Month Month { get; set; }
}