C＃：获取xml元素的属性的xpath

Question

Given the following XML:

<enrollment>
    <school>
        <students>
            <studentA fname="John" lname="Doe" age="23" />
            <studentB fname="Mary" lname="Johnson" age="22" /> 
        </students>  
    </school>  
</enrollment>

and here's my code to iterate the attributes-

foreach(XmlAttribute attr in node.Attributes)
{
    //--get the XPath for each attribute 
}

Where node = "studentA", how do I get the XPath for each attribute?

EDIT: Basically what I'm trying to achieve here is to compare if two nodes are the same. So I have to check if they have the same name, attributes, and attribute values . Therefore given a node, I need an xpath expression that that matches the conditions stated.

Answer 1

you can directly put it like as for all the studentA nodes-

Xpath- "//studentA"

or to iterate over a specific node- Xpath- "enrollment/school/students/studentA"

In case you want to find attribute fname

Xpath- "enrollment/school/students/studentA[@fname]"

Assuming myXml is your xmlDocument you can iterate over a particular node attributes like-

        System.Xml.XmlNode xn =  myXml.SelectSingleNode("enrollment/school/students/studentA");
        foreach (System.Xml.XmlAttribute attrib in xn.Attributes)
        {
            // find attribute name using attrib.Name
            string sAttribName = attrib.Name;
            if (sAttribName == "fname")
            {
                //Check your codes here
            }               
        }

Answer 2

You can use enrollment/school/students/studentA/@fname

@attribute用于属性选择。