.net - How to use LINQ to group by multiple conditions in a C# List? -

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• group multiple columns 9 answers

i have list of eqmodel.

public class eqmodel     {         public string incepicentre { get; set; }         public decimal magnitudeinml { get; set; }         public int totalhits { get; set; }             } 

i group list different locations , different ranges of magnitudesinml value.

ranges of : { 5, 6,7,8 }

i able group them separately using linq unable group using both incepicenter , magnitudeinml.

for grouping range, used:

var ranges = new[] { 5, 6,7,8 };  var lsgrouped = lseqdata.groupby(x => ranges.firstordefault(r => r > x.magnitudeinml))                                 .select(g => new { g.key,  totalhits = g.count().tostring()}); 

for incepicenter,

 var lscount = lseqdata.groupby(x => x.incepicentre)                           .select(g => new { g.key, totalhits = g.count().tostring() }); 

now, group list both.

any highly appreciated.

you can group key made of both conditions. anonymous class can used this, so:

var groupedbybothconditions = lseqdata.groupby(x => new {     range = ranges.firstordefault(r => r > x.magnitudeinml),     incepicentre = x.incepicentre }) .select(g => new { g.key,  totalhits = g.count().tostring()});