Declaring XML Namespace at Runtime

Question

Hi Unity Community!

I’m trying to write a script to add nodes to an XML document at runtime however I am encountering issues when trying to define the name attribute of the new node; I would like to know how I can declare another namespace outside of the default XMLNS attribution (in my case 'name') to match the existing markup.

I assume this is to do with the XmlNameSpaceManager but I am struggling to understand how to implement this (still pretty new to XML in Unity / uJS).

Many thanks in advance,

Ryan

My code in its current state is:

 import System.Runtime.Serialization.Formatters.Binary;
 import System.IO;
 import System.Xml;
 
 public static var control : ObjInfoControl; 
 public var doc : XmlDocument; 
 public var root : XmlNode;
 public var nodeList : XmlNodeList;
 public var docNameSpace : XmlNamespaceManager;
 
 public var health : float; //test
 public var experience : float; //test
 public var objName : String; //imported object name
 public var fileName : String; //original file name
 public var objDescript : String; //user defined description of object
 public var initialObjName : String; //initial name of object chached on load
 
 
 
 function Start(){
     //Automatically loads XML doc for save etc
     doc = new XmlDocument();
     doc.Load(Application.dataPath + "/objMetaTest01.xml");
     root = doc.DocumentElement;    
     nodeList = root.SelectNodes("MetaPipeObject");
     
     for (var i = 0; i < nodeList.Count; i++)
     {
         var node = nodeList[i];    
     }
 }
 
 
 public function CreateNewNode(){
     //Creates new node for new objects
     //will be similar to the replace function to be written soon
 
     //Namespace Manager to add namespace to file
     //docNameSpace = new XmlNamespaceManager(doc.NameTable);
     //docNameSpace.AddNamespace("name", doc.DocumentElement.NamespaceURI);
     //select last MP node to add the new one behind    
     var lastObjNode = root.SelectSingleNode("MetaPipeObject[last()]");
     var newObjNode = doc.CreateElement("MetaPipeObject", "DogTest");
     newObjNode.InnerXml = lastObjNode.InnerXml; //copy content
     root.InsertAfter(newObjNode, lastObjNode); //add to the bottom of the xml doc
     doc.Save(Application.dataPath + "/objMetaTest01.xml");
 }

The return I am currently producing:

   <MetaPipeObject xmlns="DogTest">
     <FileName xmlns="">water_drop.obj</FileName>
     <Description xmlns="">Text to go here</Description>
     <Health xmlns="">10</Health>
     <Experience xmlns="">10</Experience>
   </MetaPipeObject>

I also tested the three string CreateElement() method with better but still not ideal results:

  <MetaPipeObject:name xmlns:MetaPipeObject="DogTest">
     <FileName>water_drop.obj</FileName>
     <Description>Text to go here</Description>
     <Health>10</Health>
     <Experience>10</Experience>
   </MetaPipeObject:name>

The result I am wanting:

   <MetaPipeObject name="DogTest">
     <FileName>water_drop.obj</FileName>
     <Description>Text to go here</Description>
     <Health>10</Health>
     <Experience>10</Experience>
   </MetaPipeObject>

Answer 1

After much further research it turns out the solution to creating the desired XML format was two part and much simpler than the route I initially researched.

Firstly I was creating the the element using the wrong method; initially I was using the CreateElement(string, string) which was, presumably, invoking the default namespace URI (hence all of the xmlns attributes being associated to each of the child tags). The method I really wanted was the CreateElement(string) which simply provides the name of the element.
All that I needed to do was assign the name attribute via SetAttribute() and all was sorted.

I hope this helps anyone who finds themselves in a similar situation. The NamspaceManager is another possible route I could have used and assigned a different namespace other than the default, however to resolve my issue this seemed overkill.

Here is the snippet of code I ended up using:

 public function CreateNewNode(){
     //Creates new node for new objects
     //will be similar to the replace function to be written soon
 
     var lastObjNode = root.SelectSingleNode("MetaPipeObject[last()]"); //select last MP node to add the new one behind
     
     var newObjNode = doc.CreateElement("MetaPipeObject");
     
     //Create new attribute test
     newObjNode.SetAttribute("name", objName);
 
     newObjNode.InnerXml = lastObjNode.InnerXml; //copy content from above listing
     
     newObjNode.SelectSingleNode("FileName").InnerText = fileName;
     newObjNode.SelectSingleNode("Description").InnerText = "No Description Added Yet";
     newObjNode.SelectSingleNode("Health").InnerText = "0";
     newObjNode.SelectSingleNode("Experience").InnerText = "0";
     
     
     root.InsertAfter(newObjNode, lastObjNode); //add to the bottom of the xml doc
     
     doc.Save(Application.dataPath + "/objMetaTest01.xml");
     
     Debug.Log("CREATED new node: " + newObjNode.GetAttribute("name"));
 
 }

Declaring XML Namespace at Runtime

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