Re: [DOTNET] Setting properties

[Jon Jagger]

On Fri, 17 May 2002 19:00:49 +0100, Simon Robinson
<[EMAIL PROTECTED]> wrote:

>Hi guys
>
>I have a class with two integer properties - call them A and B.
>There is a condition that the value of B should always be greater than A,
>otherwise the class won't function correctly. I'd like the error to be
>detected and an exception thrown when client code sets the properties,
>and I'm trying to figure out if there's any way of doing this that's
>consistent with the normal .NET usage guidelines that it should be
>acceptable to set
>properties in any order.
>
>Any ideas? Is what I want to do possible?

Setting is different from initializing, so does this help?
Cheers
Jon Jagger



using System;

public class T
{
    public T(int a, int b)
    {
        ab = new AB(a, b);
    }

    public int A
    {
        get {
            return ab.A;
        }
        set {
            ab = new AB(value, ab.B);
        }
    }

    public int B
    {
        get {
            return ab.B;
        }
        set {
            ab = new AB(ab.A, value);
        }
    }

    private struct AB
    {
        public AB(int a, int b)
        {
            if (a >= b) {
                throw new Exception("...");
            }
            this.a = a;
            this.b = b;
        }

        public int A
        {
            get {
                return a;
            }
        }

        public int B
        {
            get {
                return b;
            }
        }

        private int a,b;
    }


    private AB ab;
}

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