BitConverter.ToBoolean(Byte[], Int32) Method

Definition

Returns a Boolean value converted from the byte at a specified position in a byte array.

public static bool ToBoolean (byte[] value, int startIndex);
Parameters
value
Byte[]

A byte array.

startIndex
Int32

The index of the byte within value.

Returns

true if the byte at startIndex in value is nonzero; otherwise, false.

Exceptions

value is null.

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.
using namespace System;

int main()
{
        // Define an array of byte values. 
        array<Byte>^ bytes = { 0, 1, 2, 4, 8, 16, 32, 64, 128, 255 };

        Console::WriteLine("{0,5}{1,16}{2,10}\n", "index", "array element", "bool" );
        // Convert each array element to a Boolean value.
        for (int index = 0; index < bytes->Length; index++)
           Console::WriteLine("{0,5}{1,16:X2}{2,10}", index, bytes[index], 
                             BitConverter::ToBoolean(bytes, index));
}
// The example displays the following output:
//     index   array element      bool
//     
//         0              00     False
//         1              01      True
//         2              02      True
//         3              04      True
//         4              08      True
//         5              10      True
//         6              20      True
//         7              40      True
//         8              80      True
//         9              FF      True
using System;

class Example
{
    public static void Main( )
    {
        // Define an array of byte values. 
        byte[] bytes = { 0, 1, 2, 4, 8, 16, 32, 64, 128, 255 };

        Console.WriteLine("{0,5}{1,16}{2,10}\n", "index", "array element", "bool" );
        // Convert each array element to a Boolean value.
        for (int index = 0; index < bytes.Length; index++)
           Console.WriteLine("{0,5}{1,16:X2}{2,10}", index, bytes[index], 
                             BitConverter.ToBoolean(bytes, index));
    }
}
// The example displays the following output:
//     index   array element      bool
//     
//         0              00     False
//         1              01      True
//         2              02      True
//         3              04      True
//         4              08      True
//         5              10      True
//         6              20      True
//         7              40      True
//         8              80      True
//         9              FF      True
Module Example
    Public Sub Main()
        ' Define an array of byte values. 
        Dim bytes() As Byte = { 0, 1, 2, 4, 8, 16, 32, 64, 128, 255 }

        Console.WriteLine("{0,5}{1,16}{2,10}\n", "index", "array element", "bool" )
        ' Convert each array element to a Boolean value.
        For index As Integer = 0 To bytes.Length - 1
           Console.WriteLine("{0,5}{1,16:X2}{2,10}", index, bytes(index), 
                             BitConverter.ToBoolean(bytes, index))
        Next                     
    End Sub 
End Module
' The example displays the following output:
'     index   array element      bool
'     
'         0              00     False
'         1              01      True
'         2              02      True
'         3              04      True
'         4              08      True
'         5              10      True
'         6              20      True
'         7              40      True
'         8              80      True
'         9              FF      True

Remarks

To convert a Boolean value to its byte representation, call the ToBoolean method.

Applies to

See Also