'new' is creating an array of nulls instead of an array of empty valued class

Question

I have a class

namespace MyClassNameSpace {
   public struct a {
       public float Time;
       public float High;
   }
   public class SoC {
       public string Name;
       public a[] Stock =new a[9];
   }

}

And in Form1 I create an array of SoC:

public static SoC[] b = new SoC[5];
private void Form1_KeyUp(object sender, KeyEventArgs e) {
    b[1].Name = "ABC"
}

The problem is that b is an array of nulls instead of being an array of empty (zeroed) SoC... How do I change that?

dda · Accepted Answer · 2012-07-15 04:01:08Z

9

You are creating an array of reference variables of Reference (class) type. The statement,

public static SoC[] b = new SoC[5];

creates 5 reference variables whose initial value is null.

This way you can create objects:

for(int i=0;i<b.Length;i++) {
    b[i]=new SoC();
}

edited Jul 15, 2012 at 4:01

dda

6,2212 gold badges27 silver badges37 bronze badges

answered Jul 15, 2012 at 3:47

KV Prajapati

94.8k20 gold badges151 silver badges188 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

Mike Fulton · Accepted Answer · 2012-07-15 03:51:52Z

3

Allocating space for the array doesn't actually create the objects. You need to loop through and call the constructor for each item.

answered Jul 15, 2012 at 3:51

Mike Fulton

9161 gold badge12 silver badges22 bronze badges

Collectives™ on Stack Overflow

'new' is creating an array of nulls instead of an array of empty valued class

2 Answers 2

Comments

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Related