ArrayList.IndexOf searches for the specified Object and returns the zero-based index

 

Imports System
Imports System.Collections
Imports Microsoft.VisualBasic

Public Class SamplesArrayList
    Public Shared Sub Main()
        Dim myAL As New ArrayList()
        myAL.Add("A")
        myAL.Add("B")
        myAL.Add("C")
        myAL.Add("D")
        myAL.Add("B")
        myAL.Add("C")
        myAL.Add("D")
        myAL.Add("B")
        myAL.Add("C")
        myAL.Add("D")
        myAL.Add("B")
        myAL.Add("C")
        myAL.Add("D")
        myAL.Add("B")
        myAL.Add("C")
        myAL.Add("D")

        PrintIndexAndValues(myAL)

        Dim myString As [String] = "B"
        Dim myIndex As Integer = myAL.IndexOf(myString)
        Console.WriteLine(myIndex)

        myIndex = myAL.IndexOf(myString, 4)
        Console.WriteLine("The first occurrence of ""{0}"" between index 4 and the end is at index {1}.", myString, myIndex)

    End Sub 'Main

    Public Shared Sub PrintIndexAndValues(ByVal myList As IEnumerable)
        Dim i As Integer
        Dim obj As [Object]
        For Each obj In myList
            Console.WriteLine("   [{0}]:    {1}", i, obj)
            i = i + 1
        Next obj
        Console.WriteLine()
    End Sub

End Class

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2.	ArrayList: add, remove, IndexOf, Count, Contains, TrimToSize, GetEnumerator
3.	Add element to an ArrayList and get its Length
4.	Convert ArrayList to Array
5.	Store different Class in an ArrayList
6.	Use ArrayList to Store your own class
7.	ArrayList Class Implements the IList interface
8.	Adds an object to the end of the ArrayList.
9.	ArrayList.BinarySearch Searches the entire sorted ArrayList for an element using the default comparer
10.	ArrayList.BinarySearch (Object, IComparer)
11.	ArrayList.Clear removes all elements from the ArrayList.
12.	ArrayList.CopyTo copies the entire ArrayList to a compatible one-dimensional Array, starting at the beginning of the target array.
13.	ArrayList.FixedSize returns an ArrayList wrapper with a fixed size.
14.	ArrayList.GetEnumerator returns an enumerator for a range of elements in the ArrayList.
15.	ArrayList.GetRange returns an ArrayList which represents a subset of the elements in the source ArrayList.
16.	ArrayList.Insert inserts an element into the ArrayList at the specified index.
17.	ArrayList.IsReadOnly Property tells whether the ArrayList is read-only.
18.	ArrayList.IsSynchronized Property tells whether access to the ArrayList is synchronized (thread safe).
19.	ArrayList.Item Property gets or sets the element at the specified index.
20.	ArrayList.LastIndexOf searches for Object and returns the zero-based index of the last occurrence
21.	ArrayList.Remove removes the first occurrence of a specific object from the ArrayList.
22.	ArrayList.Repeat Method returns an ArrayList whose elements are copies of the specified value.
23.	Reverses the order of the elements in the entire ArrayList.
24.	Sorts the elements in the ArrayList using the specified comparer.
25.	Sorts the elements in a range in ArrayList using the specified comparer.
26.	Sorts the elements in the entire ArrayList.
27.	Copies the elements of the ArrayList to a new array of the specified element type.
28.	Reverses the order of the elements in a range.

ArrayList.IndexOf searches for the specified Object and returns the zero-based index : ArrayList « Data Structure « VB.Net

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