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BitArray.Set Method

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

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

public void Set (
	int index,
	bool value
)
public void Set (
	int index, 
	boolean value
)
public function Set (
	index : int, 
	value : boolean
)
Not applicable.

Parameters

index

The zero-based index of the bit to set.

value

The Boolean value to assign to the bit.

Exception typeCondition

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.

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

   public static void Main()  {

      // Creates and initializes a BitArray.
      BitArray myBA = 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 ) );
   }


   public static void PrintIndexAndValues( IEnumerable myCol )  {
      int i = 0;
      foreach ( Object obj in myCol ) {
         Console.WriteLine( "    [{0}]:    {1}", i++, obj );
      }
      Console.WriteLine();
   }

}
/* 
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

*/ 

import System.*;
import System.Collections.*;

public class SamplesBitArray
{
    public static void main(String[] args)
    {
        // Creates and initializes a BitArray.
        BitArray myBA = 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.get_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}", 
            System.Convert.ToString(myBA.get_Count() - 2), 
            System.Convert.ToString(myBA.Get((myBA.get_Count() - 2))));
        Console.WriteLine("    at index {0} : {1}", 
            System.Convert.ToString(myBA.get_Count() - 1), 
            System.Convert.ToString(myBA.Get((myBA.get_Count() - 1))));
    } //main

    public static void PrintIndexAndValues(IEnumerable myCol)
    {
        int i = 0;
        IEnumerator objMyEnum = myCol.GetEnumerator();
        while (objMyEnum.MoveNext()) {
            Object obj = objMyEnum.get_Current();
            Console.WriteLine("    [{0}]:    {1}", (Int32)i++, obj);
        }
        Console.WriteLine();
    } //PrintIndexAndValues
} //SamplesBitArray 
/* 
 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

 */

Windows 98, Windows Server 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

.NET Framework

Supported in: 3.0, 2.0, 1.1, 1.0

.NET Compact Framework

Supported in: 2.0, 1.0

XNA Framework

Supported in: 1.0

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