Article
11/18/2011

BitArray.Not Method

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Inverts all the bit values in the current BitArray, so that elements set to true are changed to false, and elements set to false are changed to true.

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

Syntax

'Declaration
Public Function Not As BitArray

public BitArray Not()

Return Value

Type: System.Collections.BitArray
The current instance with inverted bit values.

Remarks

This method is an O(n) operation, where n is Count.

Examples

The following code example shows how to apply NOT to a BitArray.

Imports System.Collections

Public Class Example

   Public Shared Sub Demo(ByVal outputBlock As System.Windows.Controls.TextBlock)

      ' Creates and initializes two BitArrays of the same size.
      Dim myBA1 As New BitArray(4)
      Dim myBA2 As New BitArray(4)
      myBA1(0) = False
      myBA1(1) = False
      myBA1(2) = True
      myBA1(3) = True
      myBA2(0) = False
      myBA2(2) = False
      myBA2(1) = True
      myBA2(3) = True

      ' Performs a bitwise NOT operation between BitArray instances of the same size.
      outputBlock.Text &= "Initial values" & vbCrLf
      outputBlock.Text &= "myBA1:"
      PrintValues(outputBlock, myBA1, 8)
      outputBlock.Text &= "myBA2:"
      PrintValues(outputBlock, myBA2, 8)
      outputBlock.Text &= vbCrLf

      myBA1.Not()
      myBA2.Not()

      outputBlock.Text &= "After NOT" & vbCrLf
      outputBlock.Text &= "myBA1:"
      PrintValues(outputBlock, myBA1, 8)
      outputBlock.Text &= "myBA2:"
      PrintValues(outputBlock, myBA2, 8)
      outputBlock.Text &= vbCrLf
   End Sub

   Public Shared Sub PrintValues(ByVal outputBlock As System.Windows.Controls.TextBlock, ByVal myList As IEnumerable, ByVal myWidth As Integer)
      Dim i As Integer = myWidth
      Dim obj As [Object]
      For Each obj In myList
         If i <= 0 Then
            i = myWidth
            outputBlock.Text &= vbCrLf
         End If
         i -= 1
         outputBlock.Text += String.Format("{0,8}", obj)
      Next obj
      outputBlock.Text &= vbCrLf
   End Sub 'PrintValues

End Class


' This code produces the following output.
' 
' Initial values
' myBA1:    False    False    True    True
' myBA2:    False    True    False    True
' 
' After NOT
' myBA1:    True    True    False    False
' myBA2:    True    False    True    False

using System;
using System.Collections;
public class Example
{

   public static void Demo(System.Windows.Controls.TextBlock outputBlock)
   {

      // Creates and initializes two BitArrays of the same size.
      BitArray myBA1 = new BitArray(4);
      BitArray myBA2 = new BitArray(4);
      myBA1[0] = myBA1[1] = false;
      myBA1[2] = myBA1[3] = true;
      myBA2[0] = myBA2[2] = false;
      myBA2[1] = myBA2[3] = true;

      // Performs a bitwise NOT operation between BitArray instances of the same size.
      outputBlock.Text += "Initial values" + "\n";
      outputBlock.Text += "myBA1:";
      PrintValues(outputBlock, myBA1, 8);
      outputBlock.Text += "myBA2:";
      PrintValues(outputBlock, myBA2, 8);
      outputBlock.Text += "\n";

      myBA1.Not();
      myBA2.Not();

      outputBlock.Text += "After NOT" + "\n";
      outputBlock.Text += "myBA1:";
      PrintValues(outputBlock, myBA1, 8);
      outputBlock.Text += "myBA2:";
      PrintValues(outputBlock, myBA2, 8);
      outputBlock.Text += "\n";
   }


   public static void PrintValues(System.Windows.Controls.TextBlock outputBlock, IEnumerable myList, int myWidth)
   {
      int i = myWidth;
      foreach (Object obj in myList)
      {
         if (i <= 0)
         {
            i = myWidth;
            outputBlock.Text += "\n";
         }
         i--;
         outputBlock.Text += String.Format("{0,8}", obj);
      }
      outputBlock.Text += "\n";
   }

}


/* 
This code produces the following output.

Initial values
myBA1:   False   False    True    True
myBA2:   False    True   False    True

After NOT
myBA1:    True    True   False   False
myBA2:    True   False    True   False

*/

Version Information

Silverlight

Supported in: 5, 4, 3

Silverlight for Windows Phone

Supported in: Windows Phone OS 7.1, Windows Phone OS 7.0

XNA Framework

Supported in: Xbox 360, Windows Phone OS 7.0

Platforms

For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.

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