Convert.FromBase64CharArray(Char[], Int32, Int32) Method
Definition
Important
Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.
Converts a subset of a Unicode character array, which encodes binary data as base-64 digits, to an equivalent 8-bit unsigned integer array. Parameters specify the subset in the input array and the number of elements to convert.
public:
static cli::array <System::Byte> ^ FromBase64CharArray(cli::array <char> ^ inArray, int offset, int length);public static byte[] FromBase64CharArray (char[] inArray, int offset, int length);static member FromBase64CharArray : char[] * int * int -> byte[]Public Shared Function FromBase64CharArray (inArray As Char(), offset As Integer, length As Integer) As Byte()Parameters
- inArray
- Char[]
A Unicode character array.
- offset
- Int32
A position within inArray.
- length
- Int32
The number of elements in inArray to convert.
Returns
Byte[]
An array of 8-bit unsigned integers equivalent to length elements at position offset in inArray.
Exceptions
inArray is null.
offset or length is less than 0.
-or-
offset plus length indicates a position not within inArray.
The length of inArray, ignoring white-space characters, is not zero or a multiple of 4.
-or-
The format of inArray is invalid. inArray contains a non-base-64 character, more than two padding characters, or a non-white-space character among the padding characters.
Examples
The following example demonstrates the use of the FromBase64CharArray(Char[], Int32, Int32) method to decode UUencoded (base-64) data and save it as binary output.
public:
void DecodeWithCharArray()
{
StreamReader^ inFile;
array<Char>^base64CharArray;
try
{
inFile = gcnew StreamReader( inputFileName,
Text::Encoding::ASCII );
base64CharArray = gcnew array<Char>((int)(inFile->BaseStream->Length));
inFile->Read( base64CharArray, 0, (int)inFile->BaseStream->Length );
inFile->Close();
}
catch ( Exception^ exp )
{
// Error creating stream or reading from it.
Console::WriteLine( "{0}", exp->Message );
return;
}
// Convert the Base64 UUEncoded input into binary output.
array<Byte>^binaryData;
try
{
binaryData = Convert::FromBase64CharArray( base64CharArray,
0,
base64CharArray->Length );
}
catch ( ArgumentNullException^ )
{
Console::WriteLine( "Base 64 character array is null." );
return;
}
catch ( FormatException^ )
{
Console::WriteLine( "Base 64 Char Array length is not " +
"4 or is not an even multiple of 4." );
return;
}
// Write out the decoded data.
FileStream^ outFile;
try
{
outFile = gcnew FileStream( outputFileName,
FileMode::Create,
FileAccess::Write );
outFile->Write( binaryData, 0, binaryData->Length );
outFile->Close();
}
catch ( Exception^ exp )
{
// Error creating stream or writing to it.
Console::WriteLine( "{0}", exp->Message );
}
}
public void DecodeWithCharArray() {
System.IO.StreamReader inFile;
char[] base64CharArray;
try {
inFile = new System.IO.StreamReader(inputFileName,
System.Text.Encoding.ASCII);
base64CharArray = new char[inFile.BaseStream.Length];
inFile.Read(base64CharArray, 0, (int)inFile.BaseStream.Length);
inFile.Close();
}
catch (System.Exception exp) {
// Error creating stream or reading from it.
System.Console.WriteLine("{0}", exp.Message);
return;
}
// Convert the Base64 UUEncoded input into binary output.
byte[] binaryData;
try {
binaryData =
System.Convert.FromBase64CharArray(base64CharArray,
0,
base64CharArray.Length);
}
catch ( System.ArgumentNullException ) {
System.Console.WriteLine("Base 64 character array is null.");
return;
}
catch ( System.FormatException ) {
System.Console.WriteLine("Base 64 Char Array length is not " +
"4 or is not an even multiple of 4." );
return;
}
// Write out the decoded data.
System.IO.FileStream outFile;
try {
outFile = new System.IO.FileStream(outputFileName,
System.IO.FileMode.Create,
System.IO.FileAccess.Write);
outFile.Write(binaryData, 0, binaryData.Length);
outFile.Close();
}
catch (System.Exception exp) {
// Error creating stream or writing to it.
System.Console.WriteLine("{0}", exp.Message);
}
}
let decodeWithCharArray () =
try
let inFile =
new StreamReader(inputFileName, Encoding.ASCII)
let base64CharArray =
Array.zeroCreate<char> (int inFile.BaseStream.Length)
inFile.Read(base64CharArray, 0, (int) inFile.BaseStream.Length)
|> ignore
// Convert the Base64 UUEncoded input into binary output.
let binaryData =
Convert.FromBase64CharArray(base64CharArray, 0, base64CharArray.Length)
// Write out the decoded data.
use outFile =
new FileStream(outputFileName, FileMode.Create, FileAccess.Write)
outFile.Write(binaryData, 0, binaryData.Length)
with
| :? ArgumentNullException -> printfn "Base 64 character array is null."
| :? FormatException -> printfn "Base 64 Char Array length is not 4 or is not an even multiple of 4."
| e -> printfn $"{e.Message}"
Public Sub DecodeWithCharArray()
Dim inFile As System.IO.StreamReader
Dim base64CharArray() As Char
Try
inFile = New System.IO.StreamReader(inputFileName, _
System.Text.Encoding.ASCII)
ReDim base64CharArray(inFile.BaseStream.Length - 1)
inFile.Read(base64CharArray, 0, inFile.BaseStream.Length)
inFile.Close()
Catch exp As System.Exception
' Error creating stream or reading from it.
System.Console.WriteLine("{0}", exp.Message)
Return
End Try
' Convert the Base64 UUEncoded input into binary output.
Dim binaryData() As Byte
Try
binaryData = System.Convert.FromBase64CharArray(base64CharArray, 0, _
base64CharArray.Length)
Catch exp As System.ArgumentNullException
System.Console.WriteLine("Base 64 character array is null.")
Return
Catch exp As System.FormatException
System.Console.WriteLine("Base 64 Char Array length is not " + _
"4 or is not an even multiple of 4")
Return
End Try
' Write out the decoded data.
Dim outFile As System.IO.FileStream
Try
outFile = New System.IO.FileStream(outputFileName, _
System.IO.FileMode.Create, _
System.IO.FileAccess.Write)
outFile.Write(binaryData, 0, binaryData.Length - 1)
outFile.Close()
Catch exp As System.Exception
' Error creating stream or writing to it.
System.Console.WriteLine("{0}", exp.Message)
End Try
End Sub
The following example demonstrates the ToBase64CharArray(Byte[], Int32, Int32, Char[], Int32, Base64FormattingOptions) and FromBase64CharArray(Char[], Int32, Int32) methods. The input is divided into groups of three bytes (24 bits) each. Consequently, each group consists of four 6-bit numbers where each number ranges from decimal 0 to 63. In this example, there are 85 3-byte groups with one byte remaining. The first group consists of the hexadecimal values 00, 01, and 02, which yield four 6-bit values equal to decimal 0, 0, 4, and 2. Those four values correspond to the base-64 digits, "A", "A", "E", and "C", at the beginning of the output.
If an integral number of 3-byte groups does not exist, the remaining bytes are effectively padded with zeros to form a complete group. In this example, the value of the last byte is hexadecimal FF. The first 6 bits are equal to decimal 63, which corresponds to the base-64 digit "/" at the end of the output, and the next 2 bits are padded with zeros to yield decimal 48, which corresponds to the base-64 digit, "w". The last two 6-bit values are padding and correspond to the valueless padding character, "=".
// This example demonstrates the Convert.ToBase64CharArray() and
// Convert.FromBase64CharArray methods
using namespace System;
bool ArraysAreEqual( array<Byte>^a1, array<Byte>^a2 );
int main()
{
array<Byte>^byteArray1 = gcnew array<Byte>(256);
array<Byte>^byteArray2 = gcnew array<Byte>(256);
array<Char>^charArray = gcnew array<Char>(352);
int charArrayLength;
String^ nl = Environment::NewLine;
String^ ruler1a = " 1 2 3 4";
String^ ruler2a = "1234567890123456789012345678901234567890";
String^ ruler3a = "----+----+----+----+----+----+----+----+";
String^ ruler1b = " 5 6 7 ";
String^ ruler2b = "123456789012345678901234567890123456";
String^ ruler3b = "----+----+----+----+----+----+----+-";
String^ ruler = String::Concat( ruler1a, ruler1b, nl, ruler2a, ruler2b, nl, ruler3a, ruler3b );
// 1) Initialize and display a Byte array of arbitrary data.
Console::WriteLine( "1) Input: A Byte array of arbitrary data.{0}", nl );
for ( int x = 0; x < byteArray1->Length; x++ )
{
byteArray1[ x ] = (Byte)x;
Console::Write( "{0:X2} ", byteArray1[ x ] );
if ( ((x + 1) % 20) == 0 )
Console::WriteLine();
}
Console::Write( "{0}{0}", nl );
// 2) Convert the input Byte array to a Char array, with newlines inserted.
charArrayLength = Convert::ToBase64CharArray( byteArray1, 0, byteArray1->Length,
charArray, 0,
Base64FormattingOptions::InsertLineBreaks );
Console::WriteLine( "2) Convert the input Byte array to a Char array with newlines." );
Console::Write( " Output: A Char array (length = {0}). ", charArrayLength );
Console::WriteLine( "The elements of the array are:{0}", nl );
Console::WriteLine( ruler );
Console::WriteLine( gcnew String( charArray ) );
Console::WriteLine();
// 3) Convert the Char array back to a Byte array.
Console::WriteLine( "3) Convert the Char array to an output Byte array." );
byteArray2 = Convert::FromBase64CharArray( charArray, 0, charArrayLength );
// 4) Are the input and output Byte arrays equivalent?
Console::WriteLine( "4) The output Byte array is equal to the input Byte array: {0}", ArraysAreEqual( byteArray1, byteArray2 ) );
}
bool ArraysAreEqual( array<Byte>^a1, array<Byte>^a2 )
{
if ( a1->Length != a2->Length )
return false;
for ( int i = 0; i < a1->Length; i++ )
if ( a1[ i ] != a2[ i ] )
return false;
return true;
}
/*
This example produces the following results:
1) Input: A Byte array of arbitrary data.
00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F 10 11 12 13
14 15 16 17 18 19 1A 1B 1C 1D 1E 1F 20 21 22 23 24 25 26 27
28 29 2A 2B 2C 2D 2E 2F 30 31 32 33 34 35 36 37 38 39 3A 3B
3C 3D 3E 3F 40 41 42 43 44 45 46 47 48 49 4A 4B 4C 4D 4E 4F
50 51 52 53 54 55 56 57 58 59 5A 5B 5C 5D 5E 5F 60 61 62 63
64 65 66 67 68 69 6A 6B 6C 6D 6E 6F 70 71 72 73 74 75 76 77
78 79 7A 7B 7C 7D 7E 7F 80 81 82 83 84 85 86 87 88 89 8A 8B
8C 8D 8E 8F 90 91 92 93 94 95 96 97 98 99 9A 9B 9C 9D 9E 9F
A0 A1 A2 A3 A4 A5 A6 A7 A8 A9 AA AB AC AD AE AF B0 B1 B2 B3
B4 B5 B6 B7 B8 B9 BA BB BC BD BE BF C0 C1 C2 C3 C4 C5 C6 C7
C8 C9 CA CB CC CD CE CF D0 D1 D2 D3 D4 D5 D6 D7 D8 D9 DA DB
DC DD DE DF E0 E1 E2 E3 E4 E5 E6 E7 E8 E9 EA EB EC ED EE EF
F0 F1 F2 F3 F4 F5 F6 F7 F8 F9 FA FB FC FD FE FF
2) Convert the input Byte array to a Char array with newlines.
Output: A Char array (length = 352). The elements of the array are:
1 2 3 4 5 6 7
1234567890123456789012345678901234567890123456789012345678901234567890123456
----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+-
AAECAwQFBgcICQoLDA0ODxAREhMUFRYXGBkaGxwdHh8gISIjJCUmJygpKissLS4vMDEyMzQ1Njc4
OTo7PD0+P0BBQkNERUZHSElKS0xNTk9QUVJTVFVWV1hZWltcXV5fYGFiY2RlZmdoaWprbG1ub3Bx
cnN0dXZ3eHl6e3x9fn+AgYKDhIWGh4iJiouMjY6PkJGSk5SVlpeYmZqbnJ2en6ChoqOkpaanqKmq
q6ytrq+wsbKztLW2t7i5uru8vb6/wMHCw8TFxsfIycrLzM3Oz9DR0tPU1dbX2Nna29zd3t/g4eLj
5OXm5+jp6uvs7e7v8PHy8/T19vf4+fr7/P3+/w==
3) Convert the Char array to an output Byte array.
4) The output Byte array is equal to the input Byte array: True
*/
// This example demonstrates the Convert.ToBase64CharArray() and
// Convert.FromBase64CharArray methods
using System;
class Sample
{
public static void Main()
{
byte[] byteArray1 = new byte[256];
byte[] byteArray2 = new byte[256];
char[] charArray = new char[352];
int charArrayLength;
string nl = Environment.NewLine;
string ruler1a = " 1 2 3 4";
string ruler2a = "1234567890123456789012345678901234567890";
string ruler3a = "----+----+----+----+----+----+----+----+";
string ruler1b = " 5 6 7 ";
string ruler2b = "123456789012345678901234567890123456";
string ruler3b = "----+----+----+----+----+----+----+-";
string ruler = String.Concat(ruler1a, ruler1b, nl,
ruler2a, ruler2b, nl,
ruler3a, ruler3b);
// 1) Initialize and display a Byte array of arbitrary data.
Console.WriteLine("1) Input: A Byte array of arbitrary data.{0}", nl);
for (int x = 0; x < byteArray1.Length; x++)
{
byteArray1[x] = (byte)x;
Console.Write("{0:X2} ", byteArray1[x]);
if (((x+1)%20) == 0) Console.WriteLine();
}
Console.Write("{0}{0}", nl);
// 2) Convert the input Byte array to a Char array, with newlines inserted.
charArrayLength =
Convert.ToBase64CharArray(byteArray1, 0, byteArray1.Length,
charArray, 0, Base64FormattingOptions.InsertLineBreaks);
Console.WriteLine("2) Convert the input Byte array to a Char array with newlines.");
Console.Write(" Output: A Char array (length = {0}). ", charArrayLength);
Console.WriteLine("The elements of the array are:{0}", nl);
Console.WriteLine(ruler);
Console.WriteLine(new String(charArray));
Console.WriteLine();
// 3) Convert the Char array back to a Byte array.
Console.WriteLine("3) Convert the Char array to an output Byte array.");
byteArray2 = Convert.FromBase64CharArray(charArray, 0, charArrayLength);
// 4) Are the input and output Byte arrays equivalent?
Console.WriteLine("4) The output Byte array is equal to the input Byte array: {0}",
ArraysAreEqual(byteArray1, byteArray2));
}
public static bool ArraysAreEqual(byte[] a1, byte[] a2)
{
if (a1.Length != a2.Length) return false;
for (int i = 0; i < a1.Length; i++)
if (a1[i] != a2[i]) return false;
return true;
}
}
/*
This example produces the following results:
1) Input: A Byte array of arbitrary data.
00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F 10 11 12 13
14 15 16 17 18 19 1A 1B 1C 1D 1E 1F 20 21 22 23 24 25 26 27
28 29 2A 2B 2C 2D 2E 2F 30 31 32 33 34 35 36 37 38 39 3A 3B
3C 3D 3E 3F 40 41 42 43 44 45 46 47 48 49 4A 4B 4C 4D 4E 4F
50 51 52 53 54 55 56 57 58 59 5A 5B 5C 5D 5E 5F 60 61 62 63
64 65 66 67 68 69 6A 6B 6C 6D 6E 6F 70 71 72 73 74 75 76 77
78 79 7A 7B 7C 7D 7E 7F 80 81 82 83 84 85 86 87 88 89 8A 8B
8C 8D 8E 8F 90 91 92 93 94 95 96 97 98 99 9A 9B 9C 9D 9E 9F
A0 A1 A2 A3 A4 A5 A6 A7 A8 A9 AA AB AC AD AE AF B0 B1 B2 B3
B4 B5 B6 B7 B8 B9 BA BB BC BD BE BF C0 C1 C2 C3 C4 C5 C6 C7
C8 C9 CA CB CC CD CE CF D0 D1 D2 D3 D4 D5 D6 D7 D8 D9 DA DB
DC DD DE DF E0 E1 E2 E3 E4 E5 E6 E7 E8 E9 EA EB EC ED EE EF
F0 F1 F2 F3 F4 F5 F6 F7 F8 F9 FA FB FC FD FE FF
2) Convert the input Byte array to a Char array with newlines.
Output: A Char array (length = 352). The elements of the array are:
1 2 3 4 5 6 7
1234567890123456789012345678901234567890123456789012345678901234567890123456
----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+-
AAECAwQFBgcICQoLDA0ODxAREhMUFRYXGBkaGxwdHh8gISIjJCUmJygpKissLS4vMDEyMzQ1Njc4
OTo7PD0+P0BBQkNERUZHSElKS0xNTk9QUVJTVFVWV1hZWltcXV5fYGFiY2RlZmdoaWprbG1ub3Bx
cnN0dXZ3eHl6e3x9fn+AgYKDhIWGh4iJiouMjY6PkJGSk5SVlpeYmZqbnJ2en6ChoqOkpaanqKmq
q6ytrq+wsbKztLW2t7i5uru8vb6/wMHCw8TFxsfIycrLzM3Oz9DR0tPU1dbX2Nna29zd3t/g4eLj
5OXm5+jp6uvs7e7v8PHy8/T19vf4+fr7/P3+/w==
3) Convert the Char array to an output Byte array.
4) The output Byte array is equal to the input Byte array: True
*/
// This example demonstrates the Convert.ToBase64CharArray() and
// Convert.FromBase64CharArray methods
open System
let arraysAreEqual (a1: byte[]) (a2: byte[]) =
a1.Length = a2.Length &&
Array.forall2 (=) a2 a1
let byteArray1 = Array.zeroCreate<byte> 256
let charArray = Array.zeroCreate<char> 352
let nl = Environment.NewLine
let ruler =
$" 1 2 3 4 5 6 7 {nl}" +
$"1234567890123456789012345678901234567890123456789012345678901234567890123456{nl}" +
"----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+-"
// 1) Initialize and display a Byte array of arbitrary data.
printfn $"1) Input: A Byte array of arbitrary data.{nl}"
for i = 0 to byteArray1.Length - 1 do
byteArray1[i] <- byte i
printf $"{byteArray1[i]:X2} "
if (i + 1) % 20 = 0 then
printfn ""
printf $"{nl}{nl}"
// 2) Convert the input Byte array to a Char array, with newlines inserted.
let charArrayLength =
Convert.ToBase64CharArray(byteArray1, 0, byteArray1.Length,
charArray, 0, Base64FormattingOptions.InsertLineBreaks)
printfn "2) Convert the input Byte array to a Char array with newlines."
printf $" Output: A Char array (length = {charArrayLength}). "
printfn $"The elements of the array are:{nl}"
printfn $"{ruler}"
printfn $"{String charArray}"
printfn ""
// 3) Convert the Char array back to a Byte array.
printfn "3) Convert the Char array to an output Byte array."
let byteArray2 = Convert.FromBase64CharArray(charArray, 0, charArrayLength)
// 4) Are the input and output Byte arrays equivalent?
printfn $"4) The output Byte array is equal to the input Byte array: {arraysAreEqual byteArray1 byteArray2}"
// This example produces the following results:
// 1) Input: A Byte array of arbitrary data.
//
// 00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F 10 11 12 13
// 14 15 16 17 18 19 1A 1B 1C 1D 1E 1F 20 21 22 23 24 25 26 27
// 28 29 2A 2B 2C 2D 2E 2F 30 31 32 33 34 35 36 37 38 39 3A 3B
// 3C 3D 3E 3F 40 41 42 43 44 45 46 47 48 49 4A 4B 4C 4D 4E 4F
// 50 51 52 53 54 55 56 57 58 59 5A 5B 5C 5D 5E 5F 60 61 62 63
// 64 65 66 67 68 69 6A 6B 6C 6D 6E 6F 70 71 72 73 74 75 76 77
// 78 79 7A 7B 7C 7D 7E 7F 80 81 82 83 84 85 86 87 88 89 8A 8B
// 8C 8D 8E 8F 90 91 92 93 94 95 96 97 98 99 9A 9B 9C 9D 9E 9F
// A0 A1 A2 A3 A4 A5 A6 A7 A8 A9 AA AB AC AD AE AF B0 B1 B2 B3
// B4 B5 B6 B7 B8 B9 BA BB BC BD BE BF C0 C1 C2 C3 C4 C5 C6 C7
// C8 C9 CA CB CC CD CE CF D0 D1 D2 D3 D4 D5 D6 D7 D8 D9 DA DB
// DC DD DE DF E0 E1 E2 E3 E4 E5 E6 E7 E8 E9 EA EB EC ED EE EF
// F0 F1 F2 F3 F4 F5 F6 F7 F8 F9 FA FB FC FD FE FF
//
// 2) Convert the input Byte array to a Char array with newlines.
// Output: A Char array (length = 352). The elements of the array are:
//
// 1 2 3 4 5 6 7
// 1234567890123456789012345678901234567890123456789012345678901234567890123456
// ----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+-
// AAECAwQFBgcICQoLDA0ODxAREhMUFRYXGBkaGxwdHh8gISIjJCUmJygpKissLS4vMDEyMzQ1Njc4
// OTo7PD0+P0BBQkNERUZHSElKS0xNTk9QUVJTVFVWV1hZWltcXV5fYGFiY2RlZmdoaWprbG1ub3Bx
// cnN0dXZ3eHl6e3x9fn+AgYKDhIWGh4iJiouMjY6PkJGSk5SVlpeYmZqbnJ2en6ChoqOkpaanqKmq
// q6ytrq+wsbKztLW2t7i5uru8vb6/wMHCw8TFxsfIycrLzM3Oz9DR0tPU1dbX2Nna29zd3t/g4eLj
// 5OXm5+jp6uvs7e7v8PHy8/T19vf4+fr7/P3+/w==
//
// 3) Convert the Char array to an output Byte array.
// 4) The output Byte array is equal to the input Byte array: True
' This example demonstrates the Convert.ToBase64CharArray() and
' Convert.FromBase64CharArray methods
Class Sample
Public Shared Sub Main()
Dim byteArray1(255) As Byte
Dim byteArray2(255) As Byte
Dim charArray(351) As Char
Dim charArrayLength As Integer
Dim nl As String = Environment.NewLine
Dim ruler1a As String = " 1 2 3 4"
Dim ruler2a As String = "1234567890123456789012345678901234567890"
Dim ruler3a As String = "----+----+----+----+----+----+----+----+"
Dim ruler1b As String = " 5 6 7 "
Dim ruler2b As String = "123456789012345678901234567890123456"
Dim ruler3b As String = "----+----+----+----+----+----+----+-"
Dim ruler As String = String.Concat(ruler1a, ruler1b, nl, _
ruler2a, ruler2b, nl, _
ruler3a, ruler3b)
' 1) Initialize and display a Byte array of arbitrary data.
Console.WriteLine("1) Input: A Byte array of arbitrary data.{0}", nl)
Dim x As Integer
For x = 0 To byteArray1.Length - 1
byteArray1(x) = CByte(x)
Console.Write("{0:X2} ", byteArray1(x))
If(x + 1) Mod 20 = 0 Then
Console.WriteLine()
End If
Next x
Console.Write("{0}{0}", nl)
' 2) Convert the input Byte array to a Char array, with newlines inserted.
charArrayLength = Convert.ToBase64CharArray( _
byteArray1, 0, byteArray1.Length, _
charArray, 0, _
Base64FormattingOptions.InsertLineBreaks)
Console.WriteLine("2) Convert the input Byte array to a Char array with newlines.")
Console.Write(" Output: A Char array (length = {0}). ", charArrayLength)
Console.WriteLine("The elements of the array are:{0}", nl)
Console.WriteLine(ruler)
Console.WriteLine(New [String](charArray))
Console.WriteLine()
' 3) Convert the Char array back to a Byte array.
Console.WriteLine("3) Convert the Char array to an output Byte array.")
byteArray2 = Convert.FromBase64CharArray(charArray, 0, charArrayLength)
' 4) Are the input and output Byte arrays equivalent?
Console.WriteLine("4) The output Byte array is equal to the input Byte array: {0}", _
ArraysAreEqual(byteArray1, byteArray2))
End Sub
Public Shared Function ArraysAreEqual(a1() As Byte, a2() As Byte) As Boolean
If a1.Length <> a2.Length Then
Return False
End If
Dim i As Integer
For i = 0 To a1.Length - 1
If a1(i) <> a2(i) Then
Return False
End If
Next i
Return True
End Function 'ArraysAreEqual
End Class
'
'This example produces the following results:
'
'1) Input: A Byte array of arbitrary data.
'
'00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F 10 11 12 13
'14 15 16 17 18 19 1A 1B 1C 1D 1E 1F 20 21 22 23 24 25 26 27
'28 29 2A 2B 2C 2D 2E 2F 30 31 32 33 34 35 36 37 38 39 3A 3B
'3C 3D 3E 3F 40 41 42 43 44 45 46 47 48 49 4A 4B 4C 4D 4E 4F
'50 51 52 53 54 55 56 57 58 59 5A 5B 5C 5D 5E 5F 60 61 62 63
'64 65 66 67 68 69 6A 6B 6C 6D 6E 6F 70 71 72 73 74 75 76 77
'78 79 7A 7B 7C 7D 7E 7F 80 81 82 83 84 85 86 87 88 89 8A 8B
'8C 8D 8E 8F 90 91 92 93 94 95 96 97 98 99 9A 9B 9C 9D 9E 9F
'A0 A1 A2 A3 A4 A5 A6 A7 A8 A9 AA AB AC AD AE AF B0 B1 B2 B3
'B4 B5 B6 B7 B8 B9 BA BB BC BD BE BF C0 C1 C2 C3 C4 C5 C6 C7
'C8 C9 CA CB CC CD CE CF D0 D1 D2 D3 D4 D5 D6 D7 D8 D9 DA DB
'DC DD DE DF E0 E1 E2 E3 E4 E5 E6 E7 E8 E9 EA EB EC ED EE EF
'F0 F1 F2 F3 F4 F5 F6 F7 F8 F9 FA FB FC FD FE FF
'
'2) Convert the input Byte array to a Char array with newlines.
' Output: A Char array (length = 352). The elements of the array are:
'
' 1 2 3 4 5 6 7
'1234567890123456789012345678901234567890123456789012345678901234567890123456
'----+----+----+----+----+----+----+----+----+----+----+----+----+----+----+-
'AAECAwQFBgcICQoLDA0ODxAREhMUFRYXGBkaGxwdHh8gISIjJCUmJygpKissLS4vMDEyMzQ1Njc4
'OTo7PD0+P0BBQkNERUZHSElKS0xNTk9QUVJTVFVWV1hZWltcXV5fYGFiY2RlZmdoaWprbG1ub3Bx
'cnN0dXZ3eHl6e3x9fn+AgYKDhIWGh4iJiouMjY6PkJGSk5SVlpeYmZqbnJ2en6ChoqOkpaanqKmq
'q6ytrq+wsbKztLW2t7i5uru8vb6/wMHCw8TFxsfIycrLzM3Oz9DR0tPU1dbX2Nna29zd3t/g4eLj
'5OXm5+jp6uvs7e7v8PHy8/T19vf4+fr7/P3+/w==
'
'3) Convert the Char array to an output Byte array.
'4) The output Byte array is equal to the input Byte array: True
Remarks
inArray is composed of base-64 digits, white-space characters, and trailing padding characters. The base-64 digits in ascending order from zero are the uppercase characters "A" to "Z", lowercase characters "a" to "z", numerals "0" to "9", and the symbols "+" and "/".
The white-space characters, and their Unicode names and hexadecimal code points, are tab (CHARACTER TABULATION, U+0009), newline (LINE FEED, U+000A), carriage return (CARRIAGE RETURN, U+000D), and blank (SPACE, U+0020). An arbitrary number of white-space characters can appear in inArray because all white-space characters are ignored.
The valueless character, "=", is used for trailing padding. The end of inArray can consist of zero, one, or two padding characters.
Important
The FromBase64CharArray method is designed to process a single character array that contains all the data to be decoded. To decode base-64 character data from a stream, use the System.Security.Cryptography.FromBase64Transform class.
Applies to
See also
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