在带子节点的Xml节点中添加值后的缩进

Question

在XML节点中添加XML值后，缩进就会中断，当前XML节点的所有子节点看起来都很难看，根本不可读，但XML文件仍然有效，我的XML扫描程序工作正常。

Example of using XML-File which has no XML-value in XML-node

Example of using XML-File which has XML-value in XML-node and children

我们走吧！

public class XmlNodeSerializer : INodeSerializer
{
    private readonly XmlTextWriter _xmlWriter;

    public XmlNodeSerializer(TextWriter writer)
    {
        if(writer == null)
            throw new ArgumentNullException($"{nameof(writer)}");

        _xmlWriter = new XmlTextWriter(writer);
        _xmlWriter.Formatting = Formatting.Indented;
    }

    public void Serialize(Node node)
    {
        if(node == null)
            throw new ArgumentNullException($"{nameof(node)}");

        using (_xmlWriter)
        {
            _xmlWriter.WriteStartDocument();
            WriteXmlNode(node, _xmlWriter);
            _xmlWriter.WriteEndDocument();
        }
    }

    private static void WriteXmlNode(Node target, XmlWriter wr)
    {
        wr.WriteStartElement(target.Name);

        if (target.HasAttributes())
            foreach (var attr in target.Attributes)
                wr.WriteAttributeString(attr.Key, attr.Value);

        if(target.HasValue())
            wr.WriteValue(target.Value);

        if (target.HasChildren())
            foreach (var child in target.Children)
                WriteXmlNode(child, wr);

        wr.WriteEndElement();
    }