Question

i want to translate this line of code from php to asp.net

$subid[$value['parentid']][] = $value['id'];

i’m not familiar with asp.net data structure, i’ve tried arraylist but can’t insert at [1], dictionary do not allow duplicated keys, anyone have ideas?

thanks

Answer 1

I’m not familiar with PHP (anymore) and SO is not a translation service, but you can use

• List<Tuple<int, int>>

or

• Lookup<int, int>

instead (assuming that your ids are ints).

---

var list = new List<Tuple<int, int>>();
list.Add(Tuple.Create(1, 1));
list.Add(Tuple.Create(1, 2));
list.Add(Tuple.Create(2, 3));
list.Add(Tuple.Create(2, 4));
list.Add(Tuple.Create(3, 5));

With Enumerable.ToLookup you can create a Lookup.

var lookup = list.ToLookup(t => t.Item1, t => t.Item2);

Find all products with parent-id = 1:

var parentID1 = lookup[1];
foreach (var value in parentID1)
    Console.Write(value);