XmlException: unexpected end of file. Current depth

Questions & Answers
1

Hi Unity Community!

I am trying to save some data to an existing .xml file instead of via binary serialisation method. I require that the majority of the nodes, elements and their text components be added at runtime. However I keep encountering this error:

XmlException: unexpected end of file. Current depth is 1 file:///Users/ryanachten/Documents/UnityTests/MetaPipeline/Assets/objMetaTest01.xml Line 5, position 15.

The file this is pointed to is located in the project’s Assets folder.

Can someone please explain to me where I am going wrong here? I’m not sure what is referred to by the “Current depth is 1 file” part of the return and can’t seem to find examples relevant to my issue.

Many thanks in advance!
Ryan

The .xml code I am trying to parse and add to is:

<?xml version="1.0" encoding="utf-8"?>
<xml id="objMetaTest01" style="display:none">
<!-- Test01 XML saved data for MetaPipe -->
<MetaObjects>
</MetaObjects>

And the JS function being called is:

public function Save(){ //this could be changed to OnDisable for autosave
	
		//var filePath : String = "/Users/ryanachten/Documents/UnityTests/MetaPipeline/Assets/objMetaTest01.xml"; //location of XML file
		var filePath : String = Application.dataPath + "/objMetaTest01.xml";
		
		var xmlDoc = new XmlDocument(); //***HERE***
		
		//if(File.Exists(filePath)){ //if the XML file is at the correct location
			
			xmlDoc.Load(filePath); //load xml file
			
			var rootNode = xmlDoc.DocumentElement; //
				var modelNode = xmlDoc.CreateElement(objName); //create a new element with the object's name
					var healthNode = xmlDoc.CreateElement("health");
						var healthStr = health.ToString();
						healthNode.InnerText = healthStr;
					var expNode = xmlDoc.CreateElement("experience");
						var expStr = experience.ToString();
						expNode.InnerText = expStr;
					var objNameNode = xmlDoc.CreateElement("objName");
						objNameNode.InnerText = objName;
					var fileNameNode = xmlDoc.CreateElement("fileName");
						fileNameNode.InnerText = fileName;
					
				modelNode.AppendChild(healthNode); //append children to modelNode
				modelNode.AppendChild(expNode);
				modelNode.AppendChild(objNameNode);
				modelNode.AppendChild(fileNameNode);
			rootNode.AppendChild(modelNode); //append new modelNode to root
		
			xmlDoc.Save(filePath);
		}
2

I couldn’t find any formal documentation as to why this particular return incurred (I assume I was trying to access/add to the incorrect node), however the correct process I found for creating new nodes using XML Document is to create a new XML Element and append it to the node you want it to be a child of (as detailed in the example below).

I hope this helps anyone else in a similar situation.

Example:

doc = new XmlDocument();
doc.Load(Application.dataPath + "/objMetaTest01.xml");

root = doc.DocumentElement;

var newObjNode = doc.CreateElement("MetaPipeObject");

var fileNameNode = doc.CreateElement("FileName");
	fileNameNode.InnerText = fileName;
	newObjNode.AppendChild(fileNameNode);

var contribUserNode = doc.CreateElement("ContribName");
	contribUserNode.InnerText = "Add Contributor Name";
	newObjNode.AppendChild(contribUserNode);
	contribUsr = contribUserNode.InnerText;

var impDate = System.DateTime.Now.ToString("dd/MM/yyyy");
var contribDateNode = doc.CreateElement("ContribDate");
	contribDateNode.InnerText = impDate;
	newObjNode.AppendChild(contribDateNode);
	contribDate = contribDateNode.InnerText;	
	
var descriptionNode = doc.CreateElement("Description");
	descriptionNode.InnerText = "No Description Added Yet";
	newObjNode.AppendChild(descriptionNode);	
	objDescript = descriptionNode.InnerText;

var modelCreatorNode = doc.CreateElement("ModelCreator");
	modelCreatorNode.InnerText = "No Model Creator Added Yet";
	newObjNode.AppendChild(modelCreatorNode);	
	modelCreatorName = modelCreatorNode.InnerText;