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C# Handle XML

By Dag, on December 30th, 2016

Quick reference to XML handling in C#. Basic node navigation and attributes.

XmlDocument pmsXml = new XmlDocument();
pmsXml.LoadXml(xmlsource);

XmlNode pmsXmlNode = pmsXml.SelectSingleNode("MediaContainer");

if (pmsXmlNode == null) {
	// Expected XML, got punched in the face instead!
}
else if (!pmsXmlNode.HasChildNodes) {
	// No child nodes.
} else {
	// Travel through nodes.
	XmlNode subNode;
	string UserInfo;
	foreach (XmlElement ele in pmsXmlNode.ChildNodes) {
		UserInfo = "";
		
		subNode = ele.SelectSingleNode("User");
		UserInfo += "User: " + subNode.Attributes.GetNamedItem("title").Value;
		
		subNode = ele.SelectSingleNode("Player");
		UserInfo += ", Player: " + subNode.Attributes.GetNamedItem("title").Value;
		
		if (ele.Attributes.GetNamedItem("type").Value == "episode")
			UserInfo += ", Show: " + ele.Attributes.GetNamedItem("grandparentTitle").Value;
		else
			UserInfo += ", Show: " + ele.Attributes.GetNamedItem("title").Value;
			
		// Do something with UserInfo...
	}
}

Another snippet of code.

PMS_XML = new XmlDocument();
try {
	PMS_XML.LoadXml(ResponseString);
} catch (Exception) {
	MainFrm.HasAuthenticated = false;
	MainFrm.LogThis("FAILED trying to read XML from specified IP/Host.\n", true);
	return "";
}

// Look for VIDEO activity.
foreach (XmlNode Video in PMS_XML.SelectNodes("MediaContainer/Video")) {
	ReturnString += Video.SelectSingleNode("User").Attributes["title"].Value;
	ReturnString += "\t";

	if (Video.Attributes["type"].Value == "episode")
		ReturnString += Video.Attributes["grandparentTitle"].Value; 
	else
		ReturnString += Video.Attributes["title"].Value;

	ReturnString += "\t";
	ReturnString += Video.SelectSingleNode("Media/Part").Attributes["file"].Value;

	ReturnString += "\t";
	ReturnString += Video.Attributes["sessionKey"].Value;
				
	ReturnString += Environment.NewLine;
}