How get array element from list some object

Question

public class Ex
{
   public string example1{get;set;}
   public string example2{get;set;}
   public Test test{get;set;}
}    

public class Test
{
   public string example3 {get;set;}
 public long[] arrayLong{get;set;}
}

I have List listEx for example 10 elements. How get arraylong?

long[] result = listEx.Select( x=> x.Test.Select(y =>y.arrayLong)).ToArray();

I need only long[] how parse it?

Fabio · Accepted Answer · 2017-07-19 19:30:01Z

3

Use SelectMany function, which will "flatten" collection of collections to one collection.

var result = listEx.SelectMany(ex => ex.Test.Select(test => test.arrayLong)).ToArray();

From MSDN: Enumerable.SelectMany Method

edited Jul 19, 2017 at 19:30

answered Jul 19, 2017 at 19:24

Fabio

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Comments

Sajeetharan · Accepted Answer · 2017-07-19 19:27:28Z

1

You should use SelectMany

var outresult = listEx.SelectMany(t => t.Test.Select(s => s.arrayLong)).ToArray();

answered Jul 19, 2017 at 19:27

Sajeetharan

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