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BitArray.SetAll Method

Microsoft Silverlight will reach end of support after October 2021. Learn more.

Sets all bits in the BitArray to the specified value.

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

Syntax

'Declaration
Public Sub SetAll ( _
    value As Boolean _
)

public void SetAll(
    bool value
)

Parameters

Remarks

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

Examples

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

Imports System.Collections

Public Class Example

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

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

      ' Displays the properties and values of the BitArray.
      outputBlock.Text &= "myBA values:" & vbCrLf
      PrintIndexAndValues(outputBlock, myBA)

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

      ' Displays the properties and values of the BitArray.
      outputBlock.Text &= String.Format("After setting all elements to true,") & vbCrLf
      PrintIndexAndValues(outputBlock, myBA)

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

      ' Displays the properties and values of the BitArray.
      outputBlock.Text &= String.Format("After setting the last element to false,") & vbCrLf
      PrintIndexAndValues(outputBlock, myBA)

      ' Gets the value of the last two elements.
      outputBlock.Text &= "The last two elements are: " & vbCrLf
      outputBlock.Text &= String.Format("    at index {0} : {1}", _
         myBA.Count - 2, myBA.Get(myBA.Count - 2)) & vbCrLf
      outputBlock.Text &= String.Format("    at index {0} : {1}", _
         myBA.Count - 1, myBA.Get(myBA.Count - 1)) & vbCrLf
   End Sub 'Main

   Public Shared Sub PrintIndexAndValues(ByVal outputBlock As System.Windows.Controls.TextBlock, ByVal myCol As IEnumerable)
      Dim i As Integer
      Dim obj As Object
      i = 0
      For Each obj In myCol
         outputBlock.Text &= String.Format("    [{0}]:    {1}", i, obj) & vbCrLf
         i = i + 1
      Next obj
      outputBlock.Text &= vbCrLf
   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


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

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

      // Creates and initializes a BitArray.
      BitArray myBA = new BitArray(5);

      // Displays the properties and values of the BitArray.
      outputBlock.Text += "myBA values:" + "\n";
      PrintIndexAndValues(outputBlock, myBA);

      // Sets all the elements to true.
      myBA.SetAll(true);

      // Displays the properties and values of the BitArray.
      outputBlock.Text += String.Format("After setting all elements to true,") + "\n";
      PrintIndexAndValues(outputBlock, myBA);

      // Sets the last index to false.
      myBA.Set(myBA.Count - 1, false);

      // Displays the properties and values of the BitArray.
      outputBlock.Text += String.Format("After setting the last element to false,") + "\n";
      PrintIndexAndValues(outputBlock, myBA);

      // Gets the value of the last two elements.
      outputBlock.Text += "The last two elements are: " + "\n";
      outputBlock.Text += String.Format("    at index {0} : {1}", myBA.Count - 2, myBA.Get(myBA.Count - 2)) + "\n";
      outputBlock.Text += String.Format("    at index {0} : {1}", myBA.Count - 1, myBA.Get(myBA.Count - 1)) + "\n";
   }


   public static void PrintIndexAndValues(System.Windows.Controls.TextBlock outputBlock, IEnumerable myCol)
   {
      int i = 0;
      foreach (Object obj in myCol)
      {
         outputBlock.Text += String.Format("    [{0}]:    {1}", i++, obj) + "\n";
      }
      outputBlock.Text += "\n";
   }

}
/* 
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

*/

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.