CODEWITHSUNDEEP
c#
Katy
Katy

Reputation: 1

Sort list by multiple variables

I'd like to sort this list according to the ref and name

What should I type instead of && ? 

list.Sort((x, y) => x.ref.CompareTo(y.ref) && x.name.CompareTo(y.name));

Upvotes: 0

Views: 65

Answers (3)

Olivier Jacot-Descombes
Olivier Jacot-Descombes

Reputation: 112334

CompareTo yields -1, 0 or 1. A negative number means "first value is less than the second", 0 means "both are equal" and a positive value means "first value is greater than the second". So you could simply sort with

list.Sort((x, y) => 2 * x.ref.CompareTo(y.ref) + x.name.CompareTo(y.name));

by giving precedence to the sort order of ref by multiplying it by 2. Only if the refs are equal, the name has a chance to determine the sign.

If you prefer to first sort by name

list.Sort((x, y) => x.ref.CompareTo(y.ref) + 2 * x.name.CompareTo(y.name));

Upvotes: 1

Tim
Tim

Reputation: 6060

If you want to sort first by ref, then by name, using that syntax, it would look like this:

list.Sort((x,y)=> {
   var comp = x.ref.CompareTo(y.ref);
   if (comp == 0)
      return x.name.CompareTo(y.name);
   else
      return comp;
});

The idea is that you only compare name if ref is equal.

Upvotes: 0

adjan
adjan

Reputation: 13652

Use LINQ:

var sorted = list.OrderBy(x => x.ref).ThenBy(x => x.name);

Upvotes: 2

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