1

So I’ve been trying to translate some javascript xmlreader stuff for a conversation tree, I’ve pretty much got it, I think. The problem I’m having is with my ConvoNodes class and getting the variables in it defined(I think that’s the right term).

I declare ConvoNodes at the top

public class ConvoNodes{

public string prompt;
public string[] answers;
public int[] links;
}

Then I have an XmlReader run through and find the number of elements in my .xml file so that I can set the correct size for the arrays. After I have the counts for everything (which I have exhaustively tested with Debug.Log so I know it works), I define the variables using the counts I have obtained for the size.

convos = new ConvoNodes[promptCnt];

for(int cnt = 0; cnt < convos.Length ; cnt++){
    int a = numberOfAnswersPerPrompt[cnt]; 
    convos[cnt].answers = new string[a];
    convos[cnt].links = new int[a];
}

I know that convos works just fine, its when i move on to answers and links that I get “NullReferenceException: Object reference not set to an instance of an object”.

I’ve been banging my head against this for awhile and I feel like it’s just something dumb I’ve missed and I’d really appreciate any help.

2

You need to initialise both the size of the array (which you do) and the members of that array. So in your for loop you need:

 convos[cnt] = new ConvoNodes();