BitArray.Set(Int32, Boolean) Methode
Definitie
Belangrijk
Bepaalde informatie heeft betrekking op een voorlopige productversie die aanzienlijk kan worden gewijzigd voordat deze wordt uitgebracht. Microsoft biedt geen enkele expliciete of impliciete garanties met betrekking tot de informatie die hier wordt verstrekt.
Hiermee stelt u de bit op een specifieke positie in de BitArray opgegeven waarde in.
public:
void Set(int index, bool value);public void Set(int index, bool value);member this.Set : int * bool -> unitPublic Sub Set (index As Integer, value As Boolean)Parameters
- index
- Int32
De op nul gebaseerde index van de bit die moet worden ingesteld.
- value
- Boolean
De Booleaanse waarde die moet worden toegewezen aan de bit.
Uitzonderingen
index is kleiner dan nul.
– of –
index is groter dan of gelijk aan het aantal elementen in de BitArray.
Voorbeelden
In het volgende codevoorbeeld ziet u hoe u specifieke elementen in een 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
*/
Imports System.Collections
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
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
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
Opmerkingen
Deze methode is een O(1) bewerking.
