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2 Answers

Aryan Kumar

Aryan Kumar

06-Jul-2023

ArrayList is a generic collection in VB.NET that can store a dynamically sized list of objects. It is similar to an array, but it does not have a fixed size. This means that you can add or remove items from an ArrayList without having to resize it.

To use ArrayList in VB.NET, you need to import the System.Collections.ArrayList namespace. You can then create a new ArrayList object and add items to it.

Here is an example of how to use ArrayList in VB.NET:

VB.Net

Imports System.Collections.ArrayList

Sub Main()
    ' Create a new ArrayList object.
    Dim arrayList As New ArrayList()

    ' Add items to the ArrayList.
    arrayList.Add("Item1")
    arrayList.Add("Item2")
    arrayList.Add("Item3")

    ' Get the number of items in the ArrayList.
    Dim count As Integer = arrayList.Count

    ' Display the contents of the ArrayList.
    Dim item As Object
    For Each item In arrayList
        Console.WriteLine(item)
    Next
End Sub

This code will create a new ArrayList object and add three items to it. The code will then get the number of items in the ArrayList and display the contents of the ArrayList on the console.

Here are some of the advantages of using ArrayList in VB.NET:

  • It is a dynamically sized collection, so you do not have to worry about resizing it.
  • It is a generic collection, so you can store any type of object in it.
  • It is a simple and easy-to-use collection.

Here are some of the disadvantages of using ArrayList in VB.NET:

  • It is not as efficient as some other collections, such as List.
  • It does not have as many features as some other collections, such as sorting and searching.

Overall, ArrayList is a versatile and easy-to-use collection in VB.NET. It is a good choice for storing a dynamically sized list of objects.

Anonymous User

Anonymous User

23-Dec-2015

It represents an ordered collection of an object that can be indexed individually. It is basically an alternative to an array. However, unlike array, you can add and remove items from a list at a specified position using an index and the array resizes itself automatically. It also allows dynamic memory allocation, adding, searching and sorting items in the list.

Module Module1
    Sub Main()
        Dim list As ArrayList = New ArrayList()
        Dim i As Integer
        Console.WriteLine("Adding some numbers:")
        list.Add(45)
        list.Add(78)
        list.Add(33)
        list.Add(56)
        list.Add(12)
        list.Add(23)
        list.Add(9)
        Console.WriteLine("Capacity: {0} ", list.Capacity)
        Console.WriteLine("Total Count: {0}", list.Count)
        Console.Write("Record: ")
        For Each i In list
            Console.Write("{0} ", i)
        Next i
        Console.WriteLine()
        Console.Write("Sorted Record: ")
        list.Sort()
        For Each i In list
            Console.Write("{0} ", i)
        Next i
        Console.WriteLine()
        Console.ReadKey()
    End Sub
End Module

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