noob question

[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();

}

}

}

[Dom]

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

On May 9, 10:29 pm, "azz131" <[e-mail]:

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();

}
}
}

[Jon Skeet [C# MVP]]

azz131 <bi********@ntlworld.comwrote:

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?

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;

--
Jon Skeet - <sk***@pobox.com>
http://www.pobox.com/~skeet Blog: http://www.msmvps.com/jon.skeet
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