BitConverter.ToBoolean Method
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Returns a Boolean value converted from one byte at a specified position in a byte array.
Namespace: System
Assembly: mscorlib (in mscorlib.dll)
Syntax
'Declaration
Public Shared Function ToBoolean ( _
value As Byte(), _
startIndex As Integer _
) As Boolean
public static bool ToBoolean(
byte[] value,
int startIndex
)
Parameters
- value
Type: array<System.Byte[]
An array of bytes.
- startIndex
Type: System.Int32
The starting position within value.
Return Value
Type: System.Boolean
true if the byte at startIndex in value is nonzero; otherwise, false.
Exceptions
| Exception | Condition |
|---|---|
| ArgumentNullException | value is nulla null reference (Nothing in Visual Basic). |
| ArgumentOutOfRangeException | startIndex is less than zero or greater than the length of value minus 1. |
Examples
The following code example converts elements of Byte arrays to Boolean values with the ToBoolean method.
' Example of the BitConverter.ToBoolean method.
Module Example
Const formatter As String = "{0,5}{1,16}{2,10}"
' Convert a Byte array element to Boolean and display it.
Sub BAToBool(ByVal outputBlock As System.Windows.Controls.TextBlock, ByVal bytes() As Byte, ByVal index As Integer)
Dim value As Boolean = BitConverter.ToBoolean(bytes, index)
outputBlock.Text &= String.Format(formatter, index, _
BitConverter.ToString(bytes, index, 1), value) & vbCrLf
End Sub
Public Sub Demo(ByVal outputBlock As System.Windows.Controls.TextBlock)
Dim byteArray As Byte() = _
{0, 1, 2, 4, 8, 16, 32, 64, 128, 255}
outputBlock.Text &= String.Format( _
"This example of the BitConverter.ToBoolean( Byte( ), " & _
"Integer ) " & vbCrLf & "method generates the " & _
"following output. It converts elements of " & vbCrLf & _
"a Byte array to Boolean values." & vbCrLf) & vbCrLf
outputBlock.Text &= "initial Byte array" & vbCrLf
outputBlock.Text &= "------------------" & vbCrLf
outputBlock.Text &= BitConverter.ToString(byteArray) & vbCrLf
outputBlock.Text &= vbCrLf
outputBlock.Text &= String.Format(formatter, "index", "array element", "Boolean") & vbCrLf
outputBlock.Text &= String.Format(formatter, "-----", "-------------", "-------") & vbCrLf
' Convert Byte array elements to Boolean values.
BAToBool(outputBlock, byteArray, 0)
BAToBool(outputBlock, byteArray, 1)
BAToBool(outputBlock, byteArray, 3)
BAToBool(outputBlock, byteArray, 5)
BAToBool(outputBlock, byteArray, 8)
BAToBool(outputBlock, byteArray, 9)
End Sub
End Module
' This example of the BitConverter.ToBoolean( Byte( ), Integer )
' method generates the following output. It converts elements of
' a Byte array to Boolean values.
'
' initial Byte array
' ------------------
' 00-01-02-04-08-10-20-40-80-FF
'
' index array element Boolean
' ----- ------------- -------
' 0 00 False
' 1 01 True
' 3 04 True
' 5 10 True
' 8 80 True
' 9 FF True
// Example of the BitConverter.ToBoolean method.
using System;
class Example
{
const string formatter = "{0,5}{1,16}{2,10}";
// Convert a byte array element to bool and display it.
public static void BAToBool(System.Windows.Controls.TextBlock outputBlock, byte[] bytes, int index)
{
bool value = BitConverter.ToBoolean(bytes, index);
outputBlock.Text += String.Format(formatter, index,
BitConverter.ToString(bytes, index, 1), value) + "\n";
}
public static void Demo(System.Windows.Controls.TextBlock outputBlock)
{
byte[] byteArray = { 0, 1, 2, 4, 8, 16, 32, 64, 128, 255 };
outputBlock.Text += String.Format(
"This example of the BitConverter.ToBoolean( byte[ ], " +
"int ) \nmethod generates the following output. It " +
"converts elements \nof a byte array to bool values.\n") + "\n";
outputBlock.Text += "initial byte array" + "\n";
outputBlock.Text += "------------------" + "\n";
outputBlock.Text += BitConverter.ToString(byteArray) + '\n' + "\n";
outputBlock.Text += String.Format(formatter, "index", "array element", "bool") + "\n";
outputBlock.Text += String.Format(formatter, "-----", "-------------", "----") + "\n";
// Convert byte array elements to bool values.
BAToBool(outputBlock, byteArray, 0);
BAToBool(outputBlock, byteArray, 1);
BAToBool(outputBlock, byteArray, 3);
BAToBool(outputBlock, byteArray, 5);
BAToBool(outputBlock, byteArray, 8);
BAToBool(outputBlock, byteArray, 9);
}
}
/*
This example of the BitConverter.ToBoolean( byte[ ], int )
method generates the following output. It converts elements
of a byte array to bool values.
initial byte array
------------------
00-01-02-04-08-10-20-40-80-FF
index array element bool
----- ------------- ----
0 00 False
1 01 True
3 04 True
5 10 True
8 80 True
9 FF True
*/
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.