noob question

  • Thread starter Thread starter azz131
  • Start date Start date
A

azz131

Hi, i am trying to access a field in an array of objects but i get this
error "Exception System.NullReferenceException was thrown in debuggee:Object
reference not set to an instance of an object".What am i doing wrong?

using System;

using System.Collections.Generic;

namespace ObjectArray

{

class MyClass

{

public int x=0;

}


class MainClass

{

string a;

public static void Main(string[] args)

{

MyClass[] myobject=new MyClass[10];

myobject[1].x=10;// error here


Console.ReadLine();

}

}

}
 
You've only created an array of 10 objects. Each one is null. You
need to create and object for each of them.

myobject[0] = new MyClass (...);
....
myobject[9] = new MyClass (...);


Dom
 
azz131 said:
Hi, i am trying to access a field in an array of objects but i get this
error "Exception System.NullReferenceException was thrown in debuggee:Object
reference not set to an instance of an object".What am i doing wrong?
Click to expand...

This line:

MyClass[] myobject=new MyClass[10];

creates an array of 10 elements. Initially, every element is a null
reference. That hasn't created any instances of MyClass itself. So you
need to do:

myobject[0] = new MyClass();

before you can do myobject[0].x = 10;
 
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