如何告诉xmlwriter忽略C#中的空节点?

时间:2012-03-29 13:42:52

标签: c# xml

我将以下实体序列化为XML以发送到我们的Google Search Appliance:

[Serializable]
[XmlType("record")]
public class GSADocumentRecord
{
    public enum RecordActions
    {
        Add,
        Delete
    }

    [XmlAttribute(AttributeName = "url")]
    public string URL { get; set; }

    [XmlAttribute(AttributeName = "mimetype")]
    public string MimeType { get; set; }

    [XmlAttribute(AttributeName = "last-modified")]
    public string LastModified { get; set; }

    [XmlAttribute(AttributeName = "action")]
    public string Action { get; set; }

    [XmlArray(ElementName = "metadata", Order = 0)]
    public List<GSADocumentRecordMeta> MetaData { get; set; }

    [XmlElement(ElementName = "content", Order = 1, Type = typeof(CDATA))]
    public CDATA Content { get; set; }
}

问题在于,如果没有任何MetaData条目进行序列化,则会将<metadata />添加到xml。这是一个问题,因为如果在用于某些操作时存在空元数据节点,则GSA(无论出于何种原因)会出错。

我使用以下代码序列化此类:

        var ms = new System.IO.MemoryStream();
        XmlSerializer xml = new XmlSerializer(this.GetType());

        StreamWriter sw = new StreamWriter(ms);
        XmlWriter xw = new XmlTextWriter(sw);

        xw.WriteStartDocument();
        xw.WriteDocType("gsafeed", "-//Google//DTD GSA Feeds//EN", null, null);

        XmlSerializerNamespaces ns = new XmlSerializerNamespaces();
        ns.Add("", "");

        xml.Serialize(xw, this, ns);

        ms.Position = 0;

如果列表为空,如何告诉XmlWriter忽略此元素?

1 个答案:

答案 0 :(得分:2)

拥有自动关闭标签肯定是合法的,听起来像他们这边的解析器导致了问题。您可以先将XML写入字符串,然后执行.Replace("<metadata />", "")