Create a single item List<string> from a List<object> [duplicate]

Question

Let's say I have an object that looks like this:

private class Group
{
    public int id { get; set; }
    public string name { get; set; }
    public int memberCount { get; set; }
}

And then I have a List<Group> called groups. But, now what I need is just a list of all of the names.

List<string> names = group.???

So, just to be clear, if groups looks like this:

id    name        memberCount
-----------------------------
1,   "Math Club",    24
2,   "Chess Club",   12
3,   "Drama Club",   19

Then what I want is a list that looks like this:

"Math Club"
"Chess Club"
"Drama Club"

for future reference object is a class that all other classes inherit from, therefore and you can actually have a List<object>, which is not the exact same as a List<SomeOtherClass> — Sam I am says Reinstate Monica
– Sam I am says Reinstate Monica, Commented Oct 10, 2017 at 14:52

maccettura · Accepted Answer · 2017-10-10 14:39:55Z

4

Just use LINQ:

List<string> names = groups.Select(x => x.name).ToList();

This will Select() all the names, and turn it into a List<string> via ToList()

answered Oct 10, 2017 at 14:39

maccettura

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Comments

Salah Akbari · Accepted Answer · 2017-10-10 15:39:03Z

3

Use LINQ and Select method:

var Names = groups.Select(c => c.name).ToList();

answered Oct 10, 2017 at 14:39

Salah Akbari

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Sam Marion · Accepted Answer · 2017-10-10 14:50:30Z

1

Non Linq answer

List<string> names = new List<string>();
foreach(var group in groups)
{
    names.Add(group.name);
}

answered Oct 10, 2017 at 14:50

Sam Marion

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