I know I can do this iteratively, but it would be cool to do it in a single LINQ statement.
I have some XML that looks like this:
<parent name="george">
<child name="steve" age="10" />
<child name="sue" age="3" />
<pet type="dog" />
<child name="jill" age="7" />
</parent>
<!-- ... -->
and I want to write a LINQ to XML statement to turn it into
<node type="parent" label="george">
<node type="child" label="steve" years="10 />
<node type="child" label="sue" years="3" />
<node type="child" label="jill" years="7" />
<!-- no pets! -->
</parent>
<!-- ... -->
Is that possible in a single LINQ to XML statement?
I've included two from
statements in a LINQ statement before, but not a second select
, which seems to be what this would require.
You'll need to query the desired elements and create new elements and attributes using the queried items. Something like this should work:
var input = @"<root>
<parent name=""george"">
<child name=""steve"" age=""10"" />
<child name=""sue"" age=""3"" />
<pet type=""dog"" />
<child name=""jill"" age=""7"" />
</parent>
</root>";
var xml = XElement.Parse(input);
var query = from p in xml.Elements("parent")
select new XElement("node",
new XAttribute("type", p.Name),
new XAttribute("label", p.Attribute("name").Value),
from c in p.Elements("child")
select new XElement("node",
new XAttribute("type", c.Name),
new XAttribute("label", c.Attribute("name").Value),
new XAttribute("years", c.Attribute("age").Value)));
Quick and dirty:
doc.Elements("parent")
.Select(p =>
new XElement("node",
new XAttribute("type", p.Name),
new XAttribute("label", p.Attribute("name") != null ? p.Attribute("name").Value : ""),
p.Elements("child")
.Select(c =>
new XElement("node",
new XAttribute("type", c.Name),
new XAttribute("label", c.Attribute("name") != null ? c.Attribute("name").Value : ""),
new XAttribute("years", c.Attribute("age") != null ? c.Attribute("age").Value : ""))
)
)
);
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