सी.शार्प में ARRAYLIST

 सी.शार्प में ARRAYLIST

2.1 ARRAYLIST की मुख्य विशेषताएँ

Properties	Explanation	Example
Length	Returns the length of array. Returns integer value.	int i = arr1.Length;
Rank	Returns total number of items in all the dimension. Returns integer value.	int i = arr1.Rank;
IsFixedSize	Check whether array is fixed size or not. Returns Boolean value	bool i = arr.IsFixedSize;
IsReadOnly	Check whether array is ReadOnly or not. Returns Boolean value	bool k = arr1.IsReadOnly;

Most common functions of Array class

 

Function	Explanation	Example
Sort	Sort an array	Array.Sort(arr);
Clear	Clear an array by removing all the items	Array.Clear(arr, 0, 3);
GetLength	Returns the number of elements	arr.GetLength(0);
GetValue	Returns the value of specified items	arr.GetValue(2);
IndexOf	Returns the index position of value	Array.IndexOf(arr,45);
Copy	Copy array elements to another elements	Array.Copy(arr1,arr1,3);

 

2.2 ArrayList  में item जोड़ना

 

  Syntax : ArrayList.add(object)

  object : The Item to be add the ArrayList

  ArrayList arr;

  arr.Add("Item1");

 

2.3 ArrayList  में item insert करना

 

  Syntax : ArrayList.insert(index,object)

  index : The position of the item in an ArrayList

  object : The Item to be add the ArrayList

  ArrayList arr;

  arr.Insert(3, "Item3");

 

2.4 ArrayList  से item remove करना

  Syntax : ArrayList.Remove(object)

  object : The Item to be add the ArrayList

  arr.Remove("item2")

 

2.5 ArrayList  से specified position से item remove करना

 

  Syntax : ArrayList.RemoveAt(index)

  index : the position of an item to remove from an ArrayList

  ItemList.RemoveAt(2)

How to sort ArrayList ?

  Syntax : ArrayList.Sort()

 

2.6 Arraylist के साथ For loop का प्रयोग करना

The for-loop is popular and useful. When using for on an ArrayList, you will need to cast the element after using its index. The [i] part in the example below demonstrates how to use the indexer on the ArrayList.

Program that uses ArrayList and for: C#

using System;

using System.Collections;

class Program

{

    static void Main()

    {

            //

            // Create an ArrayList with three strings.

            //

            ArrayList list = new ArrayList();

            list.Add("man");

            list.Add("woman");

            list.Add("plant");

            //

            // Loop over ArrayList.

            //

            for (int i = 0; i < list.Count; i++)

            {

                string value = list[i] as string;

                Console.WriteLine(value);

            }

    }

}

 

2.7 Arraylist में GetRange मेथड

Another method you can use is the GetRange method. This will return a subset of the original ArrayList in a new ArrayList. This is ideal when you know a certain part of your ArrayList has a different purpose or behavior.

 

2.8 Arraylist  में SetRange:

The SetRange method on ArrayList is also useful when you need to replace a range.

 

However:

I have not found SetRange to be useful, as often you will just want to replace elements in a for-loop.

 

Program that uses GetRange: C#

 

using System;

using System.Collections;

 

class Program

{

    static void Main()

    {

            //

            // Create an ArrayList with 4 strings.

            //

            ArrayList list = new ArrayList();

            list.Add("fish");

            list.Add("amphibian");

            list.Add("bird");

            list.Add("plant");

            //

            // Get last two elements in ArrayList.

            //

            ArrayList range = list.GetRange(2, 2);

            //

            // Display the elements.

            //

            foreach (string value in range)

            {

                Console.WriteLine(value); // bird, plant

            }

    }

}