BitArray.Set Method (Int32, Boolean)

 

Sets the bit at a specific position in the BitArray to the specified value.

Namespace:   System.Collections
Assembly:  mscorlib (in mscorlib.dll)

Public Sub Set (
	index As Integer,
	value As Boolean
)

Parameters

index
Type: System.Int32

The zero-based index of the bit to set.

value
Type: System.Boolean

The Boolean value to assign to the bit.

Exception Condition
ArgumentOutOfRangeException

index is less than zero.

-or-

index is greater than or equal to the number of elements in the BitArray.

This method is an O(1) operation.

The following code example shows how to set and get specific elements in a BitArray.

Imports System
Imports System.Collections
Imports Microsoft.VisualBasic

Public Class SamplesBitArray    

    Public Shared Sub Main()

        ' Creates and initializes a BitArray.
        Dim myBA As New BitArray(5)

        ' Displays the properties and values of the BitArray.
        Console.WriteLine("myBA values:")
        PrintIndexAndValues(myBA)

        ' Sets all the elements to true.
        myBA.SetAll(True)

        ' Displays the properties and values of the BitArray.
        Console.WriteLine("After setting all elements to true,")
        PrintIndexAndValues(myBA)

        ' Sets the last index to false.
        myBA.Set(myBA.Count - 1, False)

        ' Displays the properties and values of the BitArray.
        Console.WriteLine("After setting the last element to false,")
        PrintIndexAndValues(myBA)

        ' Gets the value of the last two elements.
        Console.WriteLine("The last two elements are: ")
        Console.WriteLine("    at index {0} : {1}", _
           myBA.Count - 2, myBA.Get(myBA.Count - 2))
        Console.WriteLine("    at index {0} : {1}", _
           myBA.Count - 1, myBA.Get(myBA.Count - 1))
    End Sub 'Main

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

End Class

' This code produces the following output.
' 
' myBA values:
'     [0]:    False
'     [1]:    False
'     [2]:    False
'     [3]:    False
'     [4]:    False
' 
' After setting all elements to true,
'     [0]:    True
'     [1]:    True
'     [2]:    True
'     [3]:    True
'     [4]:    True
' 
' After setting the last element to false,
'     [0]:    True
'     [1]:    True
'     [2]:    True
'     [3]:    True
'     [4]:    False
' 
' The last two elements are:
'     at index 3 : True
'     at index 4 : False

Universal Windows Platform
Available since 8
.NET Framework
Available since 1.1
Portable Class Library
Supported in: portable .NET platforms
Silverlight
Available since 2.0
Windows Phone Silverlight
Available since 7.0
Windows Phone
Available since 8.1
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