XML selectNodes 模糊查找

    public static XmlElement[] FuzzyFindNode(string xmlPath, string key, string value=null)
    {
        XmlDocument xmlDoc = new XmlDocument();
        xmlDoc.Load(xmlPath);  
        string xpath = $"//节点名字[contains(@{key},'{value}')]"; 
        XmlNodeList nodes = xmlDoc.SelectNodes(xpath); 
        XmlElement[] eles = nodes.Cast<XmlElement>().ToArray();
        return eles;


    }

示例：

<bookstore>
	<book category="cooking">
		<title lang="en">Everyday Italian</title>
		<author>Giada De Laurentiis</author>
		<year>2005</year>
		<price>30.00</price>
	</book>
	<book category="children">
		<title lang="en">Harry Potter</title>
		<author>J.K. Rowling</author>
		<year>2005</year>
		<price>29.99</price>
	</book>
	<book category="web">
		<title lang="en">XQuery Kick Start</title>
		<author>James McGovern</author>
		<year>2003</year>
		<price>49.99</price>
	</book>
	<book category="web">
		<title lang="en">Learning XML</title>
		<author>Erik T. Ray</author>
		<year>2003</year>
		<price>39.95</price>
	</book>
</bookstore>

doc.Load("books.xml");

XmlNodeList nodes = doc.SelectNodes("//book[contains(title, 'Harry')]");

nodes就是模糊查找结果