useproperties.cs

vc的原码例子12 vc的原码例子12

using System;

class Package
{
	public Package(int W)
	{
		this.Weight = W;
	}

	private int weight;

    public int Weight
	{
		set 
		{	 
			if ((value >= 25) && (value <= 50)) 
				weight = value;
			else
				weight = -1;
		}

		get
		{
			return weight;
		}   
	}

	public void showPackage()
	{
		Console.WriteLine("Weight: {0}", Weight);
	}
}


class clsValidateWeight
{
	public static void Main ()
	{
		Package Box = new Package(50);
		Package Envelope = new Package(35);
		Package Crate = new Package(500);

		Box.showPackage();
		Envelope.showPackage();
		Crate.showPackage();

		Crate.Weight = 25;
		Box.Weight = 300;
		Envelope.Weight = 250;

		Box.showPackage();
		Envelope.showPackage();
		Crate.showPackage();
	}
}