max and min rates for the particular area -lambda query

Question

my table looks like- Area MaxRate MinRate Quarter year crossing 1000 800 1 2013 crossing 900 700 2 2013 crossing 800 600 3 2013
crossing 700 500 4 2013 crossing 600 500 1 2012 crossing 550 450 2 2012 crossing 500 400 3 2012
crossing 450 350 4 2012 indroper 2000 1500 1 2013 indroper 1800 1500 2 2013

 I want max and min rates for the particular area in current year as -

 **Area    MaxRate  MinRate       year**
 crossing  1000     500           2013

please help me to find the query in LINQ-lambda notation

Reed Copsey Reed Copsey · Accepted Answer · 2013-04-15T18:10:21

You can use GroupBy to do this:

var results = table.GroupBy(row => new { Area = row.Area, Year = row.year })
                   .Select(g => new { 
                                       Area = g.Key.Area, 
                                       MaxRate = g.Max(i => i.MaxRate),
                                       MinRate = g.Min(i => i.MinRate),
                                       Year = g.Key.Year
                                    });

max and min rates for the particular area -lambda query

1 Answers