Concatenate string properties of an object with lambda

Question

Please consider the following:

public class MyObject
{
   public bool B;
   public string Txt;
}

List<MyObject> list; //list of a bunch of MyObject's

With lambda expression, how can I produce a string consisting of comma separated values of Txt of those objects, where B is true?

Diego · Accepted Answer · 2011-04-28 17:39:28Z

55

for .net 3.5:

string.Join(",", list.Where(o => o.B).Select(o => o.Txt).ToArray())

for .net 4.0:

string.Join(",", list.Where(o => o.B).Select(o => o.Txt))

answered Apr 28, 2011 at 17:39

Diego

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3 Comments

with .net 4, you don't need .ToArray().

I need this but for visual Basic .net

@Luis String.Join(",", list.Where(Function(x) x.B).Select(Function(x) x.Txt))

BrokenGlass · Accepted Answer · 2011-04-28 17:37:49Z

3

string myString = string.Join(",", list.Where(x => x.B).Select(x=>x.Txt));

answered Apr 28, 2011 at 17:37

BrokenGlass

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Cyril Gandon · Accepted Answer · 2016-05-23 12:20:55Z

-2

var strFinal = "";
myList.ForEach(pq => strFinal += ", " + pq.ItemId);

Cyril Gandon

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answered May 23, 2016 at 10:16

Vallabh

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