Convert.FromBase64CharArray(Char[], Int32, Int32) Convert.FromBase64CharArray(Char[], Int32, Int32) Convert.FromBase64CharArray(Char[], Int32, Int32) Convert.FromBase64CharArray(Char[], Int32, Int32) Method

定義

Unicode 文字配列のサブセットを変換します。これにより、バイナリ データは Base64 の数字として等価の 8 ビット符号なし整数配列にエンコードされます。Converts a subset of a Unicode character array, which encodes binary data as base-64 digits, to an equivalent 8-bit unsigned integer array. 入力配列のサブセットと変換する要素の数をパラメーターで指定します。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()

パラメーター

inArray
Char[]

Unicode 文字配列。A Unicode character array.

offset
Int32 Int32 Int32 Int32

inArray 内での位置。A position within inArray.

length
Int32 Int32 Int32 Int32

変換する inArray の要素の数。The number of elements in inArray to convert.

戻り値

Byte[]

lengthoffset の位置にある inArray 要素と等価の 8 ビット符号なし整数の配列。An array of 8-bit unsigned integers equivalent to length elements at position offset in inArray.

例外

offset または length が 0 未満です。offset or length is less than 0.

または-or- offsetlength を加算した値は inArray の範囲外である位置を示します。offset plus length indicates a position not within inArray.

空白文字を除いた inArray の長さが、0 でなく 4 の倍数でもありません。The length of inArray, ignoring white-space characters, is not zero or a multiple of 4.

または-or- inArray の形式が正しくありません。The format of inArray is invalid. inArray に Base-64 以外の文字が含まれるか、3 個以上の埋め込み文字があるか、または埋め込み文字の間に空白以外の文字が含まれています。inArray contains a non-base-64 character, more than two padding characters, or a non-white-space character among the padding characters.

次の例では、使用、FromBase64CharArray(Char[], Int32, Int32)メソッド (base-64) エンコードされていないデータをデコードし、バイナリを出力として保存します。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);
   }
}
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

次の例で、ToBase64CharArray(Byte[], Int32, Int32, Char[], Int32, Base64FormattingOptions)FromBase64CharArray(Char[], Int32, Int32)メソッド。The following example demonstrates the ToBase64CharArray(Byte[], Int32, Int32, Char[], Int32, Base64FormattingOptions) and FromBase64CharArray(Char[], Int32, Int32) methods. 入力は、3 バイト (24 ビット) ごとのグループに分けられます。The input is divided into groups of three bytes (24 bits) each. その結果、各グループは、各数 10 進数 0 ~ 63 の範囲で 6 ビット数値の 4 つで構成されます。Consequently, each group consists of four 6-bit numbers where each number ranges from decimal 0 to 63. この例では、残りの 1 バイトで 85 の 3 バイト グループがあります。In this example, there are 85 3-byte groups with one byte remaining. 最初のグループは、00、01、02 10 進数 0、0、4、および 2 と等しい 6 ビット値が 4 つの 16 進値で構成されます。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. これら 4 つの値は、base 64 桁の数字、"A"、"A"、"E"と出力の先頭に"C"に対応します。Those four values correspond to the base-64 digits, "A", "A", "E", and "C", at the beginning of the output.

整数の 3 バイトのグループが存在しない場合、残りのバイトは完全なグループを形成するゼロを効果的に埋め込まれます。If an integral number of 3-byte groups does not exist, the remaining bytes are effectively padded with zeros to form a complete group. この例では、最後のバイトの値は、FF の 16 進数が。In this example, the value of the last byte is hexadecimal FF. 最初の 6 ビットが出力の末尾で base 64 桁「/」に対応して、10 進数の 63 等しいと、次の 2 ビットには、base 64 桁では、"w"に対応する 10 進数の 48 を生成する 0 が埋め込まれます。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". 最後の 2 つの 6 ビット値は埋め込ま、埋め込み文字を埋め込み、「=」。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
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 'Main
   
   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 'Sample
'
'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

注釈

inArray base 64 桁の数字、空白文字、および末尾の埋め込み文字で構成されます。inArray is composed of base-64 digits, white-space characters, and trailing padding characters. 0 から昇順に base 64 桁の数字は"Z"、文字の小文字を大文字の文字"A"に"z"、数字の「0」~「9」、"a"と記号「+」と「/」。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 "/".

空白文字、および Unicode 名と、16 進コード ポイントはタブ (文字集計、u+0009) 改行 (ライン フィード、u+000 a)、復帰 (キャリッジ リターン、U+000D) と空白 (スペース、U + 0020)。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). 任意の数の空白文字が含まinArrayのため、すべての空白文字は無視されます。An arbitrary number of white-space characters can appear in inArray because all white-space characters are ignored.

ジオレプリケーションの文字が「=」、末尾の埋め込みに使用します。The valueless character, "=", is used for trailing padding. 末尾inArray0 個、1 つまたは 2 つの埋め込み文字で構成されていることができます。The end of inArray can consist of zero, one, or two padding characters.

重要

FromBase64CharArrayデコードするすべてのデータを格納する 1 つの文字配列を処理するメソッドが設計されています。The FromBase64CharArray method is designed to process a single character array that contains all the data to be decoded. ストリームからデータを base 64 文字をデコードするには、使用、System.Security.Cryptography.FromBase64Transformクラス。To decode base-64 character data from a stream, use the System.Security.Cryptography.FromBase64Transform class.

適用対象

こちらもご覧ください