How do I declare this class' string array in c#?

Question

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 &lt; 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.

Answer 1

Best Answer

Answer by whydoidoit · Jul 19, 2012 at 10:51 AM

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();

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dtroyano · Jul 19, 2012 at 03:17 PM 0

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Thanks so much for the help I knew it was something absurd! I got it to work finally.

How do I declare this class' string array in c#?

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