ArrayList example in c#.

ArrayList :-

It is an alternative to array. However unlike array you can add and remove items from a list of specified postion using an index and the array resize itself automatically. It allows dynamic memory allocation, Add, search and sort items in the list.

Properties of ArrayList :-

Capacity :- Gets or sets the number of elements that ArrayList can contain.

Count :- Gets the number of elements actually contained thr ArrayList.

IsFixedSize :- Gets a value indicating whether the ArrayList has fixed size.

IsReadOnly :-  Gets a value indicating whether the ArrayList has ReadOnly.

Item :- Gets or sets the elements at specified index.

Methods of ArrayList :-

 There are 15 methods in Arraylist i.e Add(),Clear(),AddRange() which are explained in example. Below example has given in which all methods have used.

Example:-

using System;

using System.Collections;

using System.Linq;

using System.Text;

using System.Data;

namespace CollectionExample

{

    class Program

    {

static void Main(string[] args)

        {

            // ArrayList Example ---------------------------------------------------------------

            ArrayList arrayList = new ArrayList();

            Console.WriteLine("Adding some Number.");

            arrayList.Add(12);

            arrayList.Add(34);

            arrayList.Add(54);

            arrayList.Add(23);

            arrayList.Add(65);

            arrayList.Add(33);

            arrayList.Add(89);

            arrayList.Add(39);

            Console.WriteLine("Capacity :{0}", arrayList.Capacity);

            Console.WriteLine("Count :{0}", arrayList.Count);

            Console.Write("Content: ");

            foreach (int i in arrayList)

            {

                Console.Write(i + " ");

            }

            Console.WriteLine();

            Console.Write("Sorted Content: ");

            arrayList.Remove(12);//remove item 12

            arrayList.RemoveAt(1);//remove item from specified position using index

            arrayList.RemoveRange(2, 4);//remove no of item from specified position

            arrayList.Sort();// sorting arrayList

            foreach (int i in arrayList)

            {

                Console.Write(i + " ");

            }

            Console.WriteLine();

            Console.ReadKey();

        }

    }

}

Output:-

Adding some Number.

Capacity :8

Count :7

Content:12 34 54 23 65 33 89 39

Sorted Content: 23 34