ToString Method (Byte[], Int32, Int32)

BitConverter.ToString Method (Byte[], Int32, Int32)

 

Converts the numeric value of each element of a specified subarray of bytes to its equivalent hexadecimal string representation.

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

public static string ToString(
	byte[] value,
	int startIndex,
	int length
)

Parameters

value
Type: System.Byte[]

An array of bytes.

startIndex
Type: System.Int32

The starting position within value.

length
Type: System.Int32

The number of array elements in value to convert.

Return Value

Type: System.String

A string of hexadecimal pairs separated by hyphens, where each pair represents the corresponding element in a subarray of value; for example, "7F-2C-4A-00".

Exception Condition
ArgumentNullException

value is null.

ArgumentOutOfRangeException

startIndex or length is less than zero.

-or-

startIndex is greater than zero and is greater than or equal to the length of value.

ArgumentException

The combination of startIndex and length does not specify a position within value; that is, the startIndex parameter is greater than the length of value minus the length parameter.

The length elements from array position startIndex are converted. If length equals zero, the method returns String.Empty.

The order of hexadecimal strings returned by the ToString method depends on whether the computer architecture is little-endian or big-endian.

The following example uses the ToString method to convert part of a byte array, starting at the specified startIndex and with the specified length, to a string.

// Example of some BitConverter.ToString( ) method overloads.
using System;

class BytesToStringDemo
{
    // Display a byte array, using multiple lines if necessary.
    public static void WriteMultiLineByteArray( byte[ ] bytes, 
        string name )
    {
        const int rowSize = 20;
        const string underLine = "--------------------------------";
        int iter;

        Console.WriteLine( name );
        Console.WriteLine( underLine.Substring( 0, 
            Math.Min( name.Length, underLine.Length ) ) );

        for( iter = 0; iter < bytes.Length - rowSize; iter += rowSize )
        {
            Console.Write( 
                BitConverter.ToString( bytes, iter, rowSize ) );
            Console.WriteLine( "-" );
        }

        Console.WriteLine( BitConverter.ToString( bytes, iter ) );
        Console.WriteLine( );
    }

    public static void Main( )
    {
        byte[ ] arrayOne = {
              0,   0,   0,   0, 128,  63,   0,   0, 112,  65, 
              0, 255, 127,  71,   0,   0, 128,  59,   0,   0, 
            128,  47,  73,  70, 131,   5,  75,   6, 158,  63, 
             77,   6, 158,  63,  80,   6, 158,  63,  30,  55, 
            190, 121, 255, 255, 127, 255, 255, 127, 127,   1, 
              0,   0,   0, 192, 255,   0,   0, 128, 255,   0, 
              0, 128, 127 };

        byte[ ] arrayTwo = {
            255, 255, 255,   0,   0,  20,   0,  33,   0,   0, 
              0,   1,   0,   0,   0, 100, 167, 179, 182, 224, 
             13,   0, 202, 154,  59,   0, 143,  91,   0, 170, 
            170, 170, 170, 170, 170,   0,   0, 232, 137,   4, 
             35, 199, 138, 255, 232, 244, 255, 252, 205, 255, 
            255, 129 };

        byte[ ] arrayThree = {
              0, 222,   0,   0,   0, 224, 111,  64,   0,   0, 
            224, 255, 255, 255, 239,  65,   0,   0, 131,   0, 
              0,   0, 112,  63,   0, 143,   0, 100,   0,   0, 
            240,  61, 223, 136,  30,  28, 254, 116, 170,   1, 
            250,  89, 140,  66, 202, 192, 243,  63, 251,  89, 
            140,  66, 202, 192, 243,  63, 252,  89, 140,  66, 
            202, 192, 243,  63,  82, 211, 187, 188, 232, 126, 
            255, 255, 255, 244, 255, 239, 127,   1,   0,   0, 
              0,  10,  17,   0,   0, 248, 255,   0,  88,   0, 
             91,   0,   0, 240, 255,   0,   0, 240, 157 };

        Console.WriteLine( "This example of the\n" +
            "  BitConverter.ToString( byte[ ], int ) and \n" +
            "  BitConverter.ToString( byte[ ], int, int ) \n" +
            "methods generates the following output.\n" );

        WriteMultiLineByteArray( arrayOne, "arrayOne" );
        WriteMultiLineByteArray( arrayTwo, "arrayTwo" );
        WriteMultiLineByteArray( arrayThree, "arrayThree" );
    }
}

/*
This example of the
  BitConverter.ToString( byte[ ], int ) and
  BitConverter.ToString( byte[ ], int, int )
methods generates the following output.

arrayOne
--------
00-00-00-00-80-3F-00-00-70-41-00-FF-7F-47-00-00-80-3B-00-00-
80-2F-49-46-83-05-4B-06-9E-3F-4D-06-9E-3F-50-06-9E-3F-1E-37-
BE-79-FF-FF-7F-FF-FF-7F-7F-01-00-00-00-C0-FF-00-00-80-FF-00-
00-80-7F

arrayTwo
--------
FF-FF-FF-00-00-14-00-21-00-00-00-01-00-00-00-64-A7-B3-B6-E0-
0D-00-CA-9A-3B-00-8F-5B-00-AA-AA-AA-AA-AA-AA-00-00-E8-89-04-
23-C7-8A-FF-E8-F4-FF-FC-CD-FF-FF-81

arrayThree
----------
00-DE-00-00-00-E0-6F-40-00-00-E0-FF-FF-FF-EF-41-00-00-83-00-
00-00-70-3F-00-8F-00-64-00-00-F0-3D-DF-88-1E-1C-FE-74-AA-01-
FA-59-8C-42-CA-C0-F3-3F-FB-59-8C-42-CA-C0-F3-3F-FC-59-8C-42-
CA-C0-F3-3F-52-D3-BB-BC-E8-7E-FF-FF-FF-F4-FF-EF-7F-01-00-00-
00-0A-11-00-00-F8-FF-00-58-00-5B-00-00-F0-FF-00-00-F0-9D
*/

Universal Windows Platform
Available since 4.5
.NET Framework
Available since 1.1
Portable Class Library
Supported in: portable .NET platforms
Silverlight
Available since 2.0
Windows Phone Silverlight
Available since 7.0
Windows Phone
Available since 8.1
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