Can I use LINQ to retrieve only “on change” values?

Question

What I\'d like to be able to do is construct a LINQ query that retrieved me a few values from some DataRows when one of the fields changes. Here\'s a contrived example to illus

Answer 1

You could use the IEnumerable extension that takes an index.

var all = ds.Tables[0].AsEnumerable();
var weatherStuff = all.Where( (w,i) => i == 0 || w.Field("Observation") != all.ElementAt(i-1).Field("Observation") );