如何在XML的元素中检索元素的值

Question

I have the following XML:

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<Project>
<Site Address="0" Connect="COM1,9600">
</Site>
</Project>

I am trying to get the value of 'Connect'

I have this code:

var doc = XDocument.Load(xml);
var q = from x in doc.Root.Elements()
        where x.Name.LocalName == "Connect"
        select x;
ClientTB.Text = q.FirstOrDefault().ToString();

But when I run this I get the error Object reference not set to an instance of an object.

If I change the where statement to:

        where x.Name.LocalName == "Site"

Then my text contains <Site Address="0" Connect="COM1,9600"></Site>

What do I need to do to get the value of Connect?

Answer 1

var q = from x in doc.Root.Elements()
        where x.Name.LocalName == "Site"
        select x.Attribute("Connect");

Alternative

 var q = from x in doc.Descendants("Site").Attributes("Connect")
         select x;