Field initializer cannot reference non-static field

Question

I have a class:

public class LED
{
    public System.Windows.Forms.Label lbl;

    public LED(System.Windows.Forms.Label lblLED)
    {
        lbl = lblLED; 
    }

    public void blink(System.Drawing.Color color, int pattern)
    {
        // ...
    }
}

and I'm creating an instance of it in a top-class:

    public LED LED1 = new LED(lblLED1); // (1)

    public void update_LED(Label lbl, double i)
    {
        //LED LED1 = new LED(lblLED1); // (2)
    }

in case (2) it allows me to pass lblLED1 inside the constructor, but in case (1) it says:

A field initializer cannot reference the non-static field, method, or property 'lblLED1'

What's the problem?

It's not because it's a gui component. The error message gives you the reason. I'm not sure why that's not allowed, probably because of the order in which the class' various parts are initialized. — Blorgbeard
– Blorgbeard, Commented Jul 15, 2010 at 10:00

atamanroman · Accepted Answer · 2010-07-15 10:05:25Z

3

http://msdn.microsoft.com/en-us/library/5724t6za%28VS.80%29.aspx

you cant use references to fields to initialize fields in the same class outside of a method, maybe because the order in which the reference variables are initialized is not guaranteed.

answered Jul 15, 2010 at 10:05

atamanroman

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