koobas.hobune.stream
XMLDocument GetElementByID returning null
Hi guys. I'm trying to get an element of a xml by using the function GetElementById, but the function is always returning null.
//get xml text from a web service
string xml = aS.createTree();
XmlDocument tree = new XmlDocument();
tree.LoadXml(xml);
//get all nodes with the tag name "item"
XmlNodeList node = tree.GetElementsByTagName("item");
//just for test to see if i could get the attribute value which returns the expected
string idTemp = node[0].Attributes["ID"].Value;
XmlElement elem = tree.GetElementById("1");
elem is always returning null. Can you guys help me out?
By the way this is the xml that i'm trying to parse:
<?xml version="1.0" encoding="utf-8"?>
<tree>
<item id="1">
<item id="2"></item>
</item>
<item id="5">
<item id="6"></item>
<item id="7">
<item id="8">
<item id="10">
<item id="11"></item>
</item>
</item>
<item id="9"></item>
</item>
</item>
</tree>
Probably better to ask over at StackOverflow. Your question is not really Unity related.
Best Answer
Thanks Graham, already solved it there. This was the answer, if anybody has the same problem:
I added a doctype to refer my attribute "id" as an ID and the value of the id cannot start with a number, like the following example.
<?xml version="1.0" encoding="utf-8" ?>
<!DOCTYPE tree [
<!ELEMENT tree ANY>
<!ELEMENT item ANY>
<!ATTLIST item id ID #REQUIRED>
]>
<tree>
<item id="id_1">
<item id="id_2"></item>
</item>
<item id="id_5">
<item id="id_6"></item>
<item id="id_7">
<item id="id_8">
<item id="id_10">
<item id="id_11"></item>
</item>
</item>
<item id="id_9"></item>
</item>
</item>
</tree>
