如何使用Linq从xml数据中检索某些元素？

Question

This xml data is a little tricky for me, it is structured like so:

<site time="local">
    <key>000-000-000</key>
    <valid-time period-name="Monday">2012-09-03T06:00:00-04:00</valid-time>
    <valid-time period-name="Tuesday">2012-09-04T06:00:00-04:00</valid-time>
    <valid-time period-name="Wednesday">2012-09-05T06:00:00-04:00</valid-time>
    <valid-time period-name="Thursday">2012-09-06T06:00:00-04:00</valid-time>
 </site>
 <site time="local">
    <key>123-456-789</key>
    <valid-time period-name="Monday">2012-09-03T06:00:00-04:00</valid-time>
    <valid-time period-name="Tuesday">2012-09-04T06:00:00-04:00</valid-time>
    <valid-time period-name="Wednesday">2012-09-05T06:00:00-04:00</valid-time>
    <valid-time period-name="Thursday">2012-09-06T06:00:00-04:00</valid-time>
 </site>
...more <site time="">...

I am doing this to get the data:

xmlCurrent = from d in Xmldata.Descendants("site")
                        .Where(s => s.Element("key").Value.Equals("123-456-789"))
                        .Select(x => new { content = x.Value})
                        .ToList();

But all the content is going into one index of the list as a single string, how do I get each value into a different index?

Answer 1

Your current code selects <site> elements.

You probably want something more like:

  xmlCurrent = from d in Xmldata.Descendants("site")
               where d.Element("key").Value.Equals("123-456-789")
               select d.Elements("valid-time");

That would give you an IEnumerable<IEnumerable<XElement>> , maybe you'll want to flatten it.

//untested
IEnumerable<XElement> current =  Xmldata
     .Descendants("site")
     .Where(s => s.Element("key").Value.Equals("123-456-789") )
     .SelectMany(s => s.Elements("valid-time") );