In the past few months, I have been dealing with XML operations due to SOA, and I have almost forgotten all about SQL. It is now known that there are at least four commonly used XML data manipulation methods (similar to Java), but there is no actual comparison of the characteristics or advantages and disadvantages of these methods. I happened to see that there are no experiments in this area on the Internet, so I will summarize it.
At the beginning of the test, first read the XML source, use a relatively large rss file link, and copy it to the project bin/debug directory.
Stream xmlStream = new MemoryStream(File.ReadAllBytes(path));
1 static IList testXmlDocument() 2 { 3 var doc = new XmlDocument(); 4 doc.Load(xmlStream); 5 var nodeList = doc.DocumentElement.ChildNodes; 6 var lstChannel = new List
1 static IList testXmlNavigator() 2 { 3 var doc = new XmlDocument(); 4 doc.Load(xmlStream); 5 var nav = doc.CreateNavigator(); 6 nav.MoveToRoot(); 7 var nodeList = nav.Select("/channel/item"); 8 var lstChannel = new List
1 static ListtestXmlReader() 2 { 3 var lstChannel = new List (); 4 var reader = XmlReader.Create(xmlStream); 5 while (reader.Read()) 6 { 7 if (reader.Name == "item" && reader.NodeType == XmlNodeType.Element) 8 { 9 var channel = new Channel(); 10 lstChannel.Add(channel); 11 while (reader.Read()) 12 { 13 if (reader.Name == "item") break; 14 if (reader.NodeType != XmlNodeType.Element) continue; 15 switch (reader.Name) 16 { 17 case "title": 18 channel.Title = reader.ReadString(); 19 break; 20 case "link": 21 channel.Link = reader.ReadString(); 22 break; 23 case "description": 24 channel.Description = reader.ReadString(); 25 break; 26 case "content": 27 channel.Content = reader.ReadString(); 28 break; 29 case "pubDate": 30 channel.PubDate = reader.ReadString(); 31 break; 32 case "author": 33 channel.Author = reader.ReadString(); 34 break; 35 case "category": 36 channel.Category = reader.ReadString(); 37 break; 38 default: 39 break; 40 } 41 } 42 } 43 } 44 return lstChannel; 45 }
1 static IList testXmlLinq() 2 { 3 var xd = XDocument.Load(xmlStream); 4 var list = from node in xd.Elements("channel").Descendants("item") 5 select new 6 { 7 Title = node.Element("title").Value, 8 Link = node.Element("link").Value, 9 Description = node.Element("description").Value, 10 Content = node.Element("content").Value, 11 PubDate = node.Element("pubDate").Value, 12 Author = node.Element("author").Value, 13 Category = node.Element("category").Value 14 }; 15 return list.ToList(); 16 }
XmlDocment 47ms XPathNavigator 42ms XmlTextReader 23ms Xml Linq 28ms
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