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c#instance-variablesinstances

Add variable to array/list without instancing

I'm creating a guitar tab program.

You select notes (GameObject), type a chord name (string), then press a button to add the "Chord" to a list.

The Chord class is just a String and a list of GameObjects. I use currentChord to hold the current selection/name.

When I select a note, I add it to currentChord.selectedList.

When I type a name, I make it currentChord.name.

Chord currentChord;
List<Chord> allChords;

When I click a button, currentChord gets added to allChords (allChords.Add(currentChord)).

The problem is that it's instanced. So when I click to add a different selection/name, the selection of everything in the allChords.notes list changes...

Do I have to use the "new" keyword?

Solution

  • Yes, you have to use the new keyword.

    You are adding the same instance to the list over and over, so you end up with a list of references to the same instance.

    Create a new instance from the data in currentChord to add to the list, or add the instance in currentChord to the list and then create a new instance and assign to currentChord.