ArrayList in C#

19y2.8kVisual Basic .NET

June 29, 2007

Hi Guys

I got the following program from a website. Website address is given below. I wish to know what else can be used to replace the "Add" word. Please help me.

myAL.Add("Hello");
myAL.Add("World");
myAL.Add("!");

Thank you

//http://msdn2.microsoft.com/en-us/library/system.collections.arraylist.aspx

using System;
using System.Collections;

public class SamplesArrayList
{
public static void Main()
{
// Creates and initializes a new ArrayList.
ArrayList myAL = new ArrayList();
myAL.Add("Hello");
myAL.Add("World");
myAL.Add("!");

// Displays the properties and values of the ArrayList.
Console.WriteLine( "myAL" );
Console.WriteLine( " Count: {0}", myAL.Count );
Console.WriteLine( " Capacity: {0}", myAL.Capacity );
Console.Write( " Values:" );
PrintValues( myAL );
}

public static void PrintValues( IEnumerable myList )
{
foreach ( Object obj in myList )
Console.Write( " {0}", obj );
Console.WriteLine();
}
}

4 Replies

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19y ago
Thank you very much for your help Alan
Alan19y ago
It's not compiling because ArrayList doesn't have a method called Addiition, just Add and AddRange:

http://msdn2.microsoft.com/en-us/library/system.collections.arraylist_members(vs.80).aspx

The variable myAL refers to an ArrayList object and Add is a public method which takes an object as a parameter, so the following lines:

myAL.Add("Hello");

myAL.Add("World");

myAL.Add("!");

are perfectly normal usage :)
19y ago
June 30, 2007

1)Why is program not compiling when “Add” replaced by “Addition”.

myAL.Addition("Hello");

myAL.Addition("World");

myAL.Addition("!");

2)Not only that object, dot, and method call is used to access its public methods here we not using it for the usual purpose.

Please explain.
Alan19y ago
Hi maha,

You could replace the three calls to the Add() method with this call to the AddRange() method:

myAL.AddRange(new string[]{"Hello","World", "!"});

What's happening here is that a new string array is created containing the three above strings and then this array is added to the ArrayList. The effect is exactly the same as adding the strings individually.