使用XPath解析XML源（元素节点属性）中的信息

Posted 2021-02-26

The code is run in [LINQPad](http://www.google.com/url?sa=t&source=web&ct=res&cd=1&ved=0CAsQFjAA&url=http%3A%2F%2Fwww.linqpad.net%2F&ei=exUgS-a-KZOotgOs39T9CQ&usg=AFQjCNFw-ZpPkP4je7u9udiur5Wg5us7tQ&sig2=gA-_2y2xnTKzK2A9CVxXfg), which is where the Dump extension method comes from. You can pretend that it just outputs ToString. The input file for this snippet looks like so:





testfpga


test





The output of the snippet is

FpgaFilePath => testfpga
FirmwareFilePath => test

So the snippet pulls out an attribute from the 'setting' element and the content (text between tags) of the 'value' sub-element.

var path = @"C:UserspatkDesktopfile.xml";
var doc = XDocument.Load(path);
//doc.DescendantNodes().Dump();
//doc.XPathSelectElements("//setting").Dump();
//doc.XPathSelectElements("//setting").Attributes().Dump();
//doc.XPathSelectElements("//setting").Descendants().Dump();
var settings = doc.XPathSelectElements("//setting");
foreach	(var setting in settings){
	var name = setting.Attribute("name").Value;
//	setting.DescendantNodes().Dump();
	var value = setting.XPathSelectElements("value").Single().FirstNode;
	(name + " => " + value).Dump();
}