Convert.FromBase64CharArray(Char[], Int32, Int32) 方法
定義
重要
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將 Unicode 字元陣列 (將二進位資料編碼為 Base-64 位數) 的子集轉換為相等的 8 位元不帶正負號的整數陣列。 參數會指定輸入陣列中的子集,以及要轉換的項目個數。
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()
參數
- inArray
- Char[]
Unicode 字元陣列。
- offset
- Int32
inArray
中的位置。
- length
- Int32
inArray
中要轉換的項目數目。
傳回
8 位元不帶正負號的整數陣列,與 length
中 offset
位置的 inArray
項目相等。
例外狀況
inArray
為 null
。
忽略空白字元的 inArray
長度,不是零或 4 的倍數。
-或-
inArray
的格式無效。
inArray
包含非 Base-64 字元、兩個以上填補字元,或在填補字元中有非空白字元。
範例
下列範例示範如何使用 FromBase64CharArray(Char[], Int32, Int32) 方法來解碼 UUencoded (base-64) 資料,並將它儲存為二進位輸出。
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
下列範例示範 ToBase64CharArray(Byte[], Int32, Int32, Char[], Int32, Base64FormattingOptions) 和 FromBase64CharArray(Char[], Int32, Int32) 方法。 輸入會分成三個位元組的群組, (24 位) 每個位元組。 因此,每個群組都包含四個 6 位數位,其中每個數位的範圍從十進位 0 到 63。 在此範例中,有 85 個 3 位元組的群組剩餘一個位元組。 第一個群組包含十六進位值 00、01 和 02,這會產生四個 6 位值等於十進位 0、0、4 和 2。 這四個值會對應到輸出開頭的 base-64 digits、「A」、「A」、「E」 和 「C」。
如果 3 位元組群組的整數不存在,剩餘的位元組會有效地填補零,以形成完整的群組。 在此範例中,最後一個位元組的值是十六進位 FF。 前 6 個位等於 decimal 63,其對應于輸出結尾的 base-64 digit 「/」,而接下來 2 個位會填補零,以產生十進位 48,其對應于 base-64 digit 「w」。 最後兩個 6 位值會填補,並對應至無值填補字元 「=」。
// 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
備註
inArray
由 64 位數、空白字元和尾端填補字元所組成。 以零為基底 64 位數的遞增順序是大寫字元 「A」 到 「Z」、小寫字元 「a」 到 「z」、數位 「0」 到 「9」,以及符號 「+」 和 「/」。
空白字元及其 Unicode 名稱和十六進位字碼點為 tab (CHARACTER TABULATION、U+0009) 、分行符號 (LINE FEED、U+000A) 、歸位字元 (歸位字元、U+000D) ,以及空白 (SPACE、U+0020) 。 可能會顯示任意數目的空白字元, inArray
因為會忽略所有空白字元。
無值字元 「=」 用於尾端填補。 結尾 inArray
可以包含零、一或兩個填補字元。
重要
方法 FromBase64CharArray 的設計目的是要處理包含要解碼之所有資料的單一字元陣列。 若要從資料流程解碼 base-64 字元資料,請使用 System.Security.Cryptography.FromBase64Transform 類別。
適用於
另請參閱
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