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1

I am converting an XML document to JSON.

I have a node that could be multiple nodes.

The Json.Net documentation says to force the serialization of the node into an array I should add the json:array=true attribute.

On my root node I add the add the json namespace:

writer.WriteAttributeString("xmlns", "json", null, "http://james.newtonking.com/json");

then on the element I need to be an array I add the json:array=true attribute: 

writer.WriteAttributeString("Array", "http://james.newtonking.com/json", "true");

The XML looks as expected:

<result xmlns:json="http://james.newtonking.com/json">
<object json:Array="true">

but the JSON looks like this:

"result": {
"@xmlns:json": "http://james.newtonking.com/json",
  "object": {
    "@json:Array": "true",

What am I doing wrong?

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1 Answer 1

up vote 0 down vote

You've got the XML namespace wrong. It should be:

http://james.newtonking.com/projects/json

not

http://james.newtonking.com/json

Working demo with correct namespace:

class Program
{
    static void Main(string[] args)
    {
        StringBuilder sb = new StringBuilder();
        StringWriter sw = new StringWriter(sb);
        XmlTextWriter writer = new XmlTextWriter(sw);

        string xmlns = "http://james.newtonking.com/projects/json";

        writer.Formatting = System.Xml.Formatting.Indented;
        writer.WriteStartDocument();
        writer.WriteStartElement("result");
        writer.WriteAttributeString("xmlns", "json", null, xmlns);
        writer.WriteStartElement("object");
        writer.WriteAttributeString("Array", xmlns, "true");
        writer.WriteStartElement("foo");
        writer.WriteString("bar");
        writer.WriteEndElement();
        writer.WriteEndElement();
        writer.WriteEndElement();
        writer.WriteEndDocument();

        string xml = sb.ToString();
        Console.WriteLine(xml);

        Console.WriteLine();

        XmlDocument doc = new XmlDocument();
        doc.LoadXml(xml);

        string json = JsonConvert.SerializeXmlNode(doc, 
                                          Newtonsoft.Json.Formatting.Indented);

        Console.WriteLine(json);
    }
}

Output:

<?xml version="1.0" encoding="utf-16"?>
<result xmlns:json="http://james.newtonking.com/projects/json">
  <object json:Array="true">
    <foo>bar</foo>
  </object>
</result>

{
  "?xml": {
    "@version": "1.0",
    "@encoding": "utf-16"
  },
  "result": {
    "object": [
      {
        "foo": "bar"
      }
    ]
  }
}
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