multipleproperties.cs

vc的原码例子12 vc的原码例子12

using System;

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

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

		get
		{
			return weight;
		}   
	}

	private string contents;
    
	public string Contents
	{
		set 
		{	 
			if (value.Length < 20)
				contents = value;
			else
				contents = "Invalid contents";
		}

		get
		{
			return contents;
		}   
	}

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


class clsMultipleProperties
{
	public static void Main ()
	{
		Package Box = new Package(50, "Books");
		Package Envelope = new Package(35, "Contracts");
		Package Crate = new Package(500, "Very long description of contents");

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