filtering a List<XElement> on an attribute value

Question

Assume I have a variable named List<XElement> trial.  The XElements have an attribute named "tokeep".  Some of these "tokeep" nodes have a value of "*" and the others have a blank value for the "tokeep" attribute.

Using Linq, is there a way to filter trial to retain only those XElements which have a "*" in the "tokeep" attribute node?

Answer 1

Yes,

  trial.Where(t => (string)t.Attribute("tokeep) == "*")

should do or with the query syntax

  from t in trial

  where (string)t.Attribute("tokeep") == "*"

  select t

You might want to make yourself familiar with the LINQ documentation and the LINQ to XML documentation.

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