Convert.ToBase64String Convert.ToBase64String Convert.ToBase64String Convert.ToBase64String Method

Definizione

Converte il valore di una matrice di interi senza segno a 8 bit nella relativa rappresentazione di stringa equivalente codificata con cifre base 64.Converts the value of an array of 8-bit unsigned integers to its equivalent string representation that is encoded with base-64 digits.

Overload

ToBase64String(Byte[], Int32, Int32, Base64FormattingOptions) ToBase64String(Byte[], Int32, Int32, Base64FormattingOptions) ToBase64String(Byte[], Int32, Int32, Base64FormattingOptions) ToBase64String(Byte[], Int32, Int32, Base64FormattingOptions)

Converte un subset di una matrice di interi senza segno a 8 bit nella relativa rappresentazione di stringa equivalente codificata con cifre base 64.Converts a subset of an array of 8-bit unsigned integers to its equivalent string representation that is encoded with base-64 digits. I parametri specificano il sottoinsieme come offset nella matrice di input, il numero di elementi nella matrice da convertire e se inserire interruzioni di riga nel valore restituito.Parameters specify the subset as an offset in the input array, the number of elements in the array to convert, and whether to insert line breaks in the return value.

ToBase64String(Byte[], Int32, Int32) ToBase64String(Byte[], Int32, Int32) ToBase64String(Byte[], Int32, Int32) ToBase64String(Byte[], Int32, Int32)

Converte un subset di una matrice di interi senza segno a 8 bit nella relativa rappresentazione di stringa equivalente codificata con cifre base 64.Converts a subset of an array of 8-bit unsigned integers to its equivalent string representation that is encoded with base-64 digits. I parametri specificano il subset come offset nella matrice di input e il numero di elementi nella matrice da convertire.Parameters specify the subset as an offset in the input array, and the number of elements in the array to convert.

ToBase64String(Byte[], Base64FormattingOptions) ToBase64String(Byte[], Base64FormattingOptions) ToBase64String(Byte[], Base64FormattingOptions) ToBase64String(Byte[], Base64FormattingOptions)

Converte una matrice di interi senza segno a 8 bit nella relativa rappresentazione di stringa equivalente codificata con cifre base 64.Converts an array of 8-bit unsigned integers to its equivalent string representation that is encoded with base-64 digits. Un parametro specifica se inserire interruzioni di riga nel valore restituito.A parameter specifies whether to insert line breaks in the return value.

ToBase64String(Byte[]) ToBase64String(Byte[]) ToBase64String(Byte[]) ToBase64String(Byte[])

Converte una matrice di interi senza segno a 8 bit nella relativa rappresentazione di stringa equivalente codificata con cifre base 64.Converts an array of 8-bit unsigned integers to its equivalent string representation that is encoded with base-64 digits.

ToBase64String(ReadOnlySpan<Byte>, Base64FormattingOptions) ToBase64String(ReadOnlySpan<Byte>, Base64FormattingOptions) ToBase64String(ReadOnlySpan<Byte>, Base64FormattingOptions)

ToBase64String(Byte[], Int32, Int32, Base64FormattingOptions) ToBase64String(Byte[], Int32, Int32, Base64FormattingOptions) ToBase64String(Byte[], Int32, Int32, Base64FormattingOptions) ToBase64String(Byte[], Int32, Int32, Base64FormattingOptions)

Converte un subset di una matrice di interi senza segno a 8 bit nella relativa rappresentazione di stringa equivalente codificata con cifre base 64.Converts a subset of an array of 8-bit unsigned integers to its equivalent string representation that is encoded with base-64 digits. I parametri specificano il sottoinsieme come offset nella matrice di input, il numero di elementi nella matrice da convertire e se inserire interruzioni di riga nel valore restituito.Parameters specify the subset as an offset in the input array, the number of elements in the array to convert, and whether to insert line breaks in the return value.

public:
 static System::String ^ ToBase64String(cli::array <System::Byte> ^ inArray, int offset, int length, Base64FormattingOptions options);
[System.Runtime.InteropServices.ComVisible(false)]
public static string ToBase64String (byte[] inArray, int offset, int length, Base64FormattingOptions options);
static member ToBase64String : byte[] * int * int * Base64FormattingOptions -> string
Public Shared Function ToBase64String (inArray As Byte(), offset As Integer, length As Integer, options As Base64FormattingOptions) As String

Parametri

inArray
Byte[]

Matrice di interi senza segno a 8 bit.An array of 8-bit unsigned integers.

offset
Int32 Int32 Int32 Int32

Offset in inArray.An offset in inArray.

length
Int32 Int32 Int32 Int32

Numero di elementi di inArray da convertire.The number of elements of inArray to convert.

options
Base64FormattingOptions Base64FormattingOptions Base64FormattingOptions Base64FormattingOptions

InsertLineBreaks per inserire un'interruzione di riga ogni 76 caratteri o None per non inserire le interruzioni di riga.InsertLineBreaks to insert a line break every 76 characters, or None to not insert line breaks.

Restituisce

Rappresentazione di stringa in base 64 di elementi length di inArray, a partire dalla posizione offset.The string representation in base 64 of length elements of inArray, starting at position offset.

Eccezioni

offset o length è negativo.offset or length is negative.

In alternativa-or- La somma di offset e length è maggiore della lunghezza di inArray.offset plus length is greater than the length of inArray.

Esempi

Nell'esempio seguente viene illustrato ToBase64String il metodo.The following example demonstrates the ToBase64String method. L'input è suddiviso in gruppi di tre byte (24 bit) ciascuno.The input is divided into groups of three bytes (24 bits) each. Di conseguenza, ogni gruppo è costituito da quattro numeri a 6 bit in cui ogni numero è compreso tra 0 e 63.Consequently, each group consists of four 6-bit numbers where each number ranges from decimal 0 to 63. In questo esempio sono presenti gruppi a 85 3 byte con un byte rimanente.In this example, there are 85 3-byte groups with one byte remaining. Il primo gruppo è costituito dai valori esadecimali 00, 01 e 02, che producono quattro valori a 6 bit uguali a decimali 0, 0, 4 e 2.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. Questi quattro valori corrispondono alle cifre di base 64 "A", "A", "E" e "C" all'inizio dell'output.Those four values correspond to the base-64 digits "A", "A", "E", and "C" at the beginning of the output.

Se non esiste un numero integrale di gruppi di 3 byte, i byte rimanenti vengono effettivamente riempiti con zeri per formare un gruppo completo.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 questo esempio, il valore dell'ultimo byte è esadecimale FF.In this example, the value of the last byte is hexadecimal FF. I primi 6 bit sono uguali a decimali 63, che corrisponde alla cifra di base 64 "/" alla fine dell'output e i 2 bit successivi vengono riempiti con zeri per produrre il valore decimale 48, che corrisponde alla cifra di base 64, "w".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". Gli ultimi due valori a 6 bit sono la spaziatura interna e corrispondono al carattere di riempimento non valore, "=".The last two 6-bit values are padding and correspond to the valueless padding character, "=".

// This example demonstrates the Convert.ToBase64String() and 
//                               Convert.FromBase64String() methods
using namespace System;
bool ArraysAreEqual( array<Byte>^a1, array<Byte>^a2 );
int main()
{
   array<Byte>^inArray = gcnew array<Byte>(256);
   array<Byte>^outArray = gcnew array<Byte>(256);
   String^ s2;
   String^ s3;
   String^ step1 = "1) The input is a byte array (inArray) of arbitrary data.";
   String^ step2 = "2) Convert a subarray of the input data array to a base 64 string.";
   String^ step3 = "3) Convert the entire input data array to a base 64 string.";
   String^ step4 = "4) The two methods in steps 2 and 3 produce the same result: {0}";
   String^ step5 = "5) Convert the base 64 string to an output byte array (outArray).";
   String^ step6 = "6) The input and output arrays, inArray and outArray, are equal: {0}";
   int x;
   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, nl );
   
   // 1) Display an arbitrary array of input data (inArray). The data could be 
   //    derived from user input, a file, an algorithm, etc.
   Console::WriteLine( step1 );
   Console::WriteLine();
   for ( x = 0; x < inArray->Length; x++ )
   {
      inArray[ x ] = (Byte)x;
      Console::Write( "{0:X2} ", inArray[ x ] );
      if ( ((x + 1) % 20) == 0 )
            Console::WriteLine();

   }
   Console::Write( "{0}{0}", nl );
   
   // 2) Convert a subarray of the input data to a base64 string. In this case, 
   //    the subarray is the entire input data array. New lines (CRLF) are inserted.
   Console::WriteLine( step2 );
   s2 = Convert::ToBase64String( inArray, 0, inArray->Length, Base64FormattingOptions::InsertLineBreaks );
   Console::WriteLine( "{0}{1}{2}{3}", nl, ruler, s2, nl );
   
   // 3) Convert the input data to a base64 string. In this case, the entire 
   //    input data array is converted by default. New lines (CRLF) are inserted.
   Console::WriteLine( step3 );
   s3 = Convert::ToBase64String( inArray, Base64FormattingOptions::InsertLineBreaks );
   
   // 4) Test whether the methods in steps 2 and 3 produce the same result.
   Console::WriteLine( step4, s2->Equals( s3 ) );
   
   // 5) Convert the base 64 string to an output array (outArray).
   Console::WriteLine( step5 );
   outArray = Convert::FromBase64String( s2 );
   
   // 6) Is outArray equal to inArray?
   Console::WriteLine( step6, ArraysAreEqual( inArray, outArray ) );
}

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) The input is a byte array (inArray) 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 a subarray of the input data array to a base 64 string.

         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 entire input data array to a base 64 string.
4) The two methods in steps 2 and 3 produce the same result: True
5) Convert the base 64 string to an output byte array (outArray).
6) The input and output arrays, inArray and outArray, are equal: True

*/
// This example demonstrates the Convert.ToBase64String() and 
//                               Convert.FromBase64String() methods

using System;
class Sample 
{
    public static void Main() 
    {
    byte[] inArray  = new byte[256];
    byte[] outArray = new byte[256];
    string s2;
    string s3;
    string step1 = "1) The input is a byte array (inArray) of arbitrary data.";
    string step2 = "2) Convert a subarray of the input data array to a base 64 string.";
    string step3 = "3) Convert the entire input data array to a base 64 string.";
    string step4 = "4) The two methods in steps 2 and 3 produce the same result: {0}";
    string step5 = "5) Convert the base 64 string to an output byte array (outArray).";
    string step6 = "6) The input and output arrays, inArray and outArray, are equal: {0}";
    int x;
    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, nl);

// 1) Display an arbitrary array of input data (inArray). The data could be 
//    derived from user input, a file, an algorithm, etc.

    Console.WriteLine(step1);
    Console.WriteLine();
    for (x = 0; x < inArray.Length; x++)
        {
        inArray[x] = (byte)x;
        Console.Write("{0:X2} ", inArray[x]);
        if (((x+1)%20) == 0) Console.WriteLine();
        }
    Console.Write("{0}{0}", nl);

// 2) Convert a subarray of the input data to a base64 string. In this case, 
//    the subarray is the entire input data array. New lines (CRLF) are inserted.

    Console.WriteLine(step2);
    s2 = Convert.ToBase64String(inArray, 0, inArray.Length, 
                                Base64FormattingOptions.InsertLineBreaks);
    Console.WriteLine("{0}{1}{2}{3}", nl, ruler, s2, nl);

// 3) Convert the input data to a base64 string. In this case, the entire 
//    input data array is converted by default. New lines (CRLF) are inserted.

    Console.WriteLine(step3);
    s3 = Convert.ToBase64String(inArray, Base64FormattingOptions.InsertLineBreaks);

// 4) Test whether the methods in steps 2 and 3 produce the same result.
    Console.WriteLine(step4, s2.Equals(s3));

// 5) Convert the base 64 string to an output array (outArray).
    Console.WriteLine(step5);
    outArray = Convert.FromBase64String(s2);

// 6) Is outArray equal to inArray?
   Console.WriteLine(step6, ArraysAreEqual(inArray, outArray));
   }

    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) The input is a byte array (inArray) 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 a subarray of the input data array to a base 64 string.

         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 entire input data array to a base 64 string.
4) The two methods in steps 2 and 3 produce the same result: True
5) Convert the base 64 string to an output byte array (outArray).
6) The input and output arrays, inArray and outArray, are equal: True

*/
' This example demonstrates the Convert.ToBase64String() and 
'                               Convert.FromBase64String() methods
Class Sample
   Public Shared Sub Main()
      Dim inArray(255)  As Byte
      Dim outArray(255) As Byte
      Dim s2 As String
      Dim s3 As String
      Dim step1 As String = "1) The input is a byte array (inArray) of arbitrary data."
      Dim step2 As String = "2) Convert a subarray of the input data array to a base 64 string."
      Dim step3 As String = "3) Convert the entire input data array to a base 64 string."
      Dim step4 As String = "4) The two methods in steps 2 and 3 produce the same result: {0}"
      Dim step5 As String = "5) Convert the base 64 string to an output byte array (outArray)."
      Dim step6 As String = "6) The input and output arrays, inArray and outArray, are equal: {0}"
      Dim x 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, nl)
      
      ' 1) Display an arbitrary array of input data (inArray). The data could be 
      '    derived from user input, a file, an algorithm, etc.
      Console.WriteLine(step1)
      Console.WriteLine()
      For x = 0 To inArray.Length - 1
         inArray(x) = CByte(x)
         Console.Write("{0:X2} ", inArray(x))
         If (x + 1) Mod 20 = 0 Then
            Console.WriteLine()
         End If
      Next x
      Console.Write("{0}{0}", nl)
      
      ' 2) Convert a subarray of the input data to a base64 string. In this case, 
      '    the subarray is the entire input data array. New lines (CRLF) are inserted.
      Console.WriteLine(step2)
      s2 = Convert.ToBase64String(inArray, 0, inArray.Length, _
                                  Base64FormattingOptions.InsertLineBreaks)
      Console.WriteLine("{0}{1}{2}{3}", nl, ruler, s2, nl)
      
      ' 3) Convert the input data to a base64 string. In this case, the entire 
      '    input data array is converted by default. New lines (CRLF) are inserted.
      Console.WriteLine(step3)
      s3 = Convert.ToBase64String(inArray, Base64FormattingOptions.InsertLineBreaks)
      
      ' 4) Test whether the methods in steps 2 and 3 produce the same result.
      Console.WriteLine(step4, s2.Equals(s3))
      
      ' 5) Convert the base 64 string to an output array (outArray).
      Console.WriteLine(step5)
      outArray = Convert.FromBase64String(s2)
      
      ' 6) Is outArray equal to inArray?
      Console.WriteLine(step6, ArraysAreEqual(inArray, outArray))
   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 'Sample
'
'This example produces the following results:
'
'1) The input is a byte array (inArray) 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 a subarray of the input data array to a base 64 string.
'
'         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 entire input data array to a base 64 string.
'4) The two methods in steps 2 and 3 produce the same result: True
'5) Convert the base 64 string to an output byte array (outArray).
'6) The input and output arrays, inArray and outArray, are equal: True
'

Commenti

Gli elementi del inArray parametro vengono considerati come valori numerici e convertiti in una rappresentazione di stringa in base 64.The elements of the inArray parameter are taken as a numeric value and converted to a string representation in base 64.

Le cifre in base 64 in ordine crescente da zero sono i caratteri maiuscoli da "A" a "Z", i caratteri minuscoli "a" a "z", i numeri "0" a "9" e i simboli "+" e "/".The base-64 digits in ascending order from zero are the uppercase characters "A" to "Z", the lowercase characters "a" to "z", the numerals "0" to "9", and the symbols "+" and "/". Il carattere "=" non valore viene utilizzato per la spaziatura interna finale.The valueless character "=" is used for trailing padding.

I offset parametri length e sono numeri con segno a 32 bit.The offset and length parameters are 32-bit signed numbers. Il offset parametro è in base zero.The offset parameter is zero-based.

Importante

Il ToBase64String metodo è progettato per elaborare una matrice a byte singolo contenente tutti i dati da codificare.The ToBase64String method is designed to process a single byte array that contains all the data to be encoded. Per codificare i dati da un flusso, System.Security.Cryptography.ToBase64Transform usare la classe.To encode data from a stream, use the System.Security.Cryptography.ToBase64Transform class.

Se il options parametro è impostato su InsertLineBreaks e l'output della conversione è più lungo di 76 caratteri, viene inserita un'interruzioni di riga ogni 76 caratteri.If the options parameter is set to InsertLineBreaks and the output of the conversion is longer than 76 characters, a line break is inserted every 76 characters. Un'interruzioni di riga viene definita come un carattere di ritorno a capo (U + d) seguito da un carattere di avanzamento riga (U + 000A).A line break is defined as a carriage return character (U+000D) followed by a line feed character (U+000A). Per ulteriori informazioni, vedere la specifica RFC 2045, "Multipurpose Internet Mail Extensions" https://www.rfc-editor.org/, all'indirizzo.For more information, see RFC 2045, "Multipurpose Internet Mail Extensions", at https://www.rfc-editor.org/.

Vedi anche

ToBase64String(Byte[], Int32, Int32) ToBase64String(Byte[], Int32, Int32) ToBase64String(Byte[], Int32, Int32) ToBase64String(Byte[], Int32, Int32)

Converte un subset di una matrice di interi senza segno a 8 bit nella relativa rappresentazione di stringa equivalente codificata con cifre base 64.Converts a subset of an array of 8-bit unsigned integers to its equivalent string representation that is encoded with base-64 digits. I parametri specificano il subset come offset nella matrice di input e il numero di elementi nella matrice da convertire.Parameters specify the subset as an offset in the input array, and the number of elements in the array to convert.

public:
 static System::String ^ ToBase64String(cli::array <System::Byte> ^ inArray, int offset, int length);
public static string ToBase64String (byte[] inArray, int offset, int length);
static member ToBase64String : byte[] * int * int -> string
Public Shared Function ToBase64String (inArray As Byte(), offset As Integer, length As Integer) As String

Parametri

inArray
Byte[]

Matrice di interi senza segno a 8 bit.An array of 8-bit unsigned integers.

offset
Int32 Int32 Int32 Int32

Offset in inArray.An offset in inArray.

length
Int32 Int32 Int32 Int32

Numero di elementi di inArray da convertire.The number of elements of inArray to convert.

Restituisce

Rappresentazione di stringa in base 64 di elementi length di inArray, a partire dalla posizione offset.The string representation in base 64 of length elements of inArray, starting at position offset.

Eccezioni

offset o length è negativo.offset or length is negative.

-oppure--or- La somma di offset e length è maggiore della lunghezza di inArray.offset plus length is greater than the length of inArray.

Commenti

Gli elementi di inArray vengono considerati come valori numerici e convertiti in una rappresentazione di stringa in base 64.The elements of inArray are taken as a numeric value and converted to a string representation in base 64.

Le cifre in base 64 in ordine crescente da zero sono i caratteri maiuscoli da "A" a "Z", i caratteri minuscoli "a" a "z", i numeri "0" a "9" e i simboli "+" e "/".The base-64 digits in ascending order from zero are the uppercase characters "A" to "Z", the lowercase characters "a" to "z", the numerals "0" to "9", and the symbols "+" and "/". Il carattere non valore, "=", viene utilizzato per la spaziatura interna finale.The valueless character, "=", is used for trailing padding.

I offset parametri length e sono numeri con segno a 32 bit.The offset and length parameters are 32-bit signed numbers. Il offset parametro è in base zero.The offset parameter is zero-based.

Importante

Il ToBase64String metodo è progettato per elaborare una matrice a byte singolo contenente tutti i dati da codificare.The ToBase64String method is designed to process a single byte array that contains all the data to be encoded. Per codificare i dati da un flusso, System.Security.Cryptography.ToBase64Transform usare la classe.To encode data from a stream, use the System.Security.Cryptography.ToBase64Transform class.

Vedi anche

ToBase64String(Byte[], Base64FormattingOptions) ToBase64String(Byte[], Base64FormattingOptions) ToBase64String(Byte[], Base64FormattingOptions) ToBase64String(Byte[], Base64FormattingOptions)

Converte una matrice di interi senza segno a 8 bit nella relativa rappresentazione di stringa equivalente codificata con cifre base 64.Converts an array of 8-bit unsigned integers to its equivalent string representation that is encoded with base-64 digits. Un parametro specifica se inserire interruzioni di riga nel valore restituito.A parameter specifies whether to insert line breaks in the return value.

public:
 static System::String ^ ToBase64String(cli::array <System::Byte> ^ inArray, Base64FormattingOptions options);
[System.Runtime.InteropServices.ComVisible(false)]
public static string ToBase64String (byte[] inArray, Base64FormattingOptions options);
static member ToBase64String : byte[] * Base64FormattingOptions -> string
Public Shared Function ToBase64String (inArray As Byte(), options As Base64FormattingOptions) As String

Parametri

inArray
Byte[]

Matrice di interi senza segno a 8 bit.An array of 8-bit unsigned integers.

options
Base64FormattingOptions Base64FormattingOptions Base64FormattingOptions Base64FormattingOptions

InsertLineBreaks per inserire un'interruzione di riga ogni 76 caratteri o None per non inserire le interruzioni di riga.InsertLineBreaks to insert a line break every 76 characters, or None to not insert line breaks.

Restituisce

Rappresentazione di stringa in base 64 degli elementi di inArray.The string representation in base 64 of the elements in inArray.

Eccezioni

Esempi

Nell'esempio seguente viene chiamato Convert.ToBase64String(Byte[], Base64FormattingOptions) con un Base64FormattingOptions.InsertLineBreaks argomento per inserire interruzioni di riga nella stringa prodotta dalla codifica di una matrice di byte a 100 elementi.The following example calls the Convert.ToBase64String(Byte[], Base64FormattingOptions) with a Base64FormattingOptions.InsertLineBreaks argument to insert line breaks in the string that is produced by encoding a 100-element byte array.

using System;

public class Example
{
   public static void Main()
   {
       // Define a byte array.
       var bytes = new byte[100];
       int originalTotal = 0;
       for (int ctr = 0; ctr <= bytes.GetUpperBound(0); ctr++) {
          bytes[ctr] = (byte)(ctr + 1);
          originalTotal += bytes[ctr];
       }
       // Display summary information about the array.
       Console.WriteLine("The original byte array:");
       Console.WriteLine("   Total elements: {0}", bytes.Length);
       Console.WriteLine("   Length of String Representation: {0}",
                         BitConverter.ToString(bytes).Length);
       Console.WriteLine("   Sum of elements: {0:N0}", originalTotal);                  
       Console.WriteLine();
       
       // Convert the array to a base 64 string.
       string s = Convert.ToBase64String(bytes, 
                                         Base64FormattingOptions.InsertLineBreaks);
       Console.WriteLine("The base 64 string:\n   {0}\n", s);
       
       // Restore the byte array.
       Byte[] newBytes = Convert.FromBase64String(s);
       int newTotal = 0;
       foreach (var newByte in newBytes)
          newTotal += newByte;

       // Display summary information about the restored array.
       Console.WriteLine("   Total elements: {0}", newBytes.Length);
       Console.WriteLine("   Length of String Representation: {0}",
                         BitConverter.ToString(newBytes).Length);
       Console.WriteLine("   Sum of elements: {0:N0}", newTotal);                  
   }
}
// The example displays the following output:
//   The original byte array:
//      Total elements: 100
//      Length of String Representation: 299
//      Sum of elements: 5,050
//   
//   The base 64 string:
//      AQIDBAUGBwgJCgsMDQ4PEBESExQVFhcYGRobHB0eHyAhIiMkJSYnKCkqKywtLi8wMTIzNDU2Nzg5
//   Ojs8PT4/QEFCQ0RFRkdISUpLTE1OT1BRUlNUVVZXWFlaW1xdXl9gYWJjZA==
//   
//      Total elements: 100
//      Length of String Representation: 299
//      Sum of elements: 5,050
Module Example
   Public Sub Main()
       ' Define a byte array.
       Dim bytes(99) As Byte
       Dim originalTotal As Integer = 0
       For ctr As Integer = 0 To bytes.GetUpperBound(0)
          bytes(ctr) = CByte(ctr + 1)
          originalTotal += bytes(ctr)
       Next
       ' Display summary information about the array.
       Console.WriteLine("The original byte array:")
       Console.WriteLine("   Total elements: {0}", bytes.Length)
       Console.WriteLine("   Length of String Representation: {0}",
                         BitConverter.ToString(bytes).Length)
       Console.WriteLine("   Sum of elements: {0:N0}", originalTotal)                  
       Console.WriteLine()
       
       ' Convert the array to a base 64 string.
       Dim s As String = Convert.ToBase64String(bytes, 
                                               Base64FormattingOptions.InsertLineBreaks)
       Console.WriteLine("The base 64 string:{1}   {0}{1}", 
                         s, vbCrLf)
       
       ' Restore the byte array.
       Dim newBytes() As Byte = Convert.FromBase64String(s)
       Dim newTotal As Integer = 0
       For Each newByte In newBytes
          newTotal += newByte
       Next
       ' Display summary information about the restored array.
       Console.WriteLine("   Total elements: {0}", newBytes.Length)
       Console.WriteLine("   Length of String Representation: {0}",
                         BitConverter.ToString(newBytes).Length)
       Console.WriteLine("   Sum of elements: {0:N0}", newTotal)                  
   End Sub
End Module
' The example displays the following output:
'   The original byte array:
'      Total elements: 100
'      Length of String Representation: 299
'      Sum of elements: 5,050
'   
'   The base 64 string:
'      AQIDBAUGBwgJCgsMDQ4PEBESExQVFhcYGRobHB0eHyAhIiMkJSYnKCkqKywtLi8wMTIzNDU2Nzg5
'   Ojs8PT4/QEFCQ0RFRkdISUpLTE1OT1BRUlNUVVZXWFlaW1xdXl9gYWJjZA==
'   
'      Total elements: 100
'      Length of String Representation: 299
'      Sum of elements: 5,050

Come illustrato nell'output dell'esempio, l'oggetto Convert.FromBase64String riesce a ripristinare la matrice di byte originale. i caratteri di interruzioni di riga vengono ignorati durante la conversione.As the output from the example shows, the Convert.FromBase64String succeeds in restoring the original byte array; the line break characters are ignored during the conversion.

Commenti

Gli elementi del inArray parametro vengono considerati come valori numerici e convertiti in una rappresentazione di stringa in base 64.The elements of the inArray parameter are taken as a numeric value and converted to a string representation in base 64.

Le cifre in base 64 in ordine crescente da zero sono i caratteri maiuscoli da "A" a "Z", i caratteri minuscoli "a" a "z", i numeri "0" a "9" e i simboli "+" e "/".The base-64 digits in ascending order from zero are the uppercase characters "A" to "Z", the lowercase characters "a" to "z", the numerals "0" to "9", and the symbols "+" and "/". Il carattere "=" non valore viene utilizzato per la spaziatura interna finale.The valueless character "=" is used for trailing padding.

Importante

Il ToBase64String metodo è progettato per elaborare una matrice a byte singolo contenente tutti i dati da codificare.The ToBase64String method is designed to process a single byte array that contains all the data to be encoded. Per codificare i dati da un flusso, System.Security.Cryptography.ToBase64Transform usare la classe.To encode data from a stream, use the System.Security.Cryptography.ToBase64Transform class.

Se il options parametro è impostato su InsertLineBreaks e l'output della conversione è più lungo di 76 caratteri, viene inserita un'interruzioni di riga ogni 76 caratteri.If the options parameter is set to InsertLineBreaks and the output of the conversion is longer than 76 characters, a line break is inserted every 76 characters. Un'interruzioni di riga viene definita come un carattere di ritorno a capo (U + d) seguito da un carattere di avanzamento riga (U + 000A).A line break is defined as a carriage return character (U+000D) followed by a line feed character (U+000A). Poiché le interruzioni di riga sono considerate spazi vuoti in una codifica base-64, vengono ignorate quando si converte una stringa con codifica base 64 in una matrice di byte.Because line breaks are considered white-space characters in a base-64 encoding, they are ignored when converting a base-64 encoded string back to a byte array. Le interruzioni di riga sono semplicemente utili quando si visualizza la stringa codificata in un controllo o in un dispositivo, ad esempio una finestra della console.The line breaks are simply convenient when displaying the encoded string to a control or a device such as a console window. Per ulteriori informazioni, vedere la specifica RFC 2045, "Multipurpose Internet Mail Extensions" https://www.rfc-editor.org/, all'indirizzo.For more information, see RFC 2045, "Multipurpose Internet Mail Extensions", at https://www.rfc-editor.org/.

Vedi anche

ToBase64String(Byte[]) ToBase64String(Byte[]) ToBase64String(Byte[]) ToBase64String(Byte[])

Converte una matrice di interi senza segno a 8 bit nella relativa rappresentazione di stringa equivalente codificata con cifre base 64.Converts an array of 8-bit unsigned integers to its equivalent string representation that is encoded with base-64 digits.

public:
 static System::String ^ ToBase64String(cli::array <System::Byte> ^ inArray);
public static string ToBase64String (byte[] inArray);
static member ToBase64String : byte[] -> string
Public Shared Function ToBase64String (inArray As Byte()) As String

Parametri

inArray
Byte[]

Matrice di interi senza segno a 8 bit.An array of 8-bit unsigned integers.

Restituisce

Rappresentazione di stringa, in base 64, del contenuto di inArray.The string representation, in base 64, of the contents of inArray.

Eccezioni

Esempi

Nell'esempio seguente viene usato ToBase64String(Byte[]) il metodo per convertire una matrice di byte in una stringa UUEncoded (base-64) e quindi viene FromBase64String(String) chiamato il metodo per ripristinare la matrice di byte originale.The following example uses the ToBase64String(Byte[]) method to convert a byte array to a UUencoded (base-64) string, and then calls the FromBase64String(String) method to restore the original byte array.

using System;

public class Example
{
   public static void Main()
   {
       // Define a byte array.
       byte[] bytes = { 2, 4, 6, 8, 10, 12, 14, 16, 18, 20 };
       Console.WriteLine("The byte array: ");
       Console.WriteLine("   {0}\n", BitConverter.ToString(bytes));
       
       // Convert the array to a base 64 string.
       string s = Convert.ToBase64String(bytes);
       Console.WriteLine("The base 64 string:\n   {0}\n", s);
       
       // Restore the byte array.
       byte[] newBytes = Convert.FromBase64String(s);
       Console.WriteLine("The restored byte array: ");
       Console.WriteLine("   {0}\n", BitConverter.ToString(newBytes));
   }
}
// The example displays the following output:
//     The byte array:
//        02-04-06-08-0A-0C-0E-10-12-14
//     
//     The base 64 string:
//        AgQGCAoMDhASFA==
//     
//     The restored byte array:
//        02-04-06-08-0A-0C-0E-10-12-14
Module Example
   Public Sub Main()
       ' Define a byte array.
       Dim bytes As Byte() = { 2, 4, 6, 8, 10, 12, 14, 16, 18, 20 }
       Console.WriteLine("The byte array: ")
       Console.WriteLine("   {0}", BitConverter.ToString(bytes))
       Console.WriteLine()
       
       ' Convert the array to a base 64 string.
       Dim s As String = Convert.ToBase64String(bytes)
       Console.WriteLine("The base 64 string:{1}   {0}{1}", 
                         s, vbCrLf)
       
       ' Restore the byte array.
       Dim newBytes As Byte() = Convert.FromBase64String(s)
       Console.WriteLine("The restored byte array: ")
       Console.WriteLine("   {0}", BitConverter.ToString(newBytes))
       Console.WriteLine()
   End Sub
End Module
' The example displays the following output:
'     The byte array:
'        02-04-06-08-0A-0C-0E-10-12-14
'     
'     The base 64 string:
'        AgQGCAoMDhASFA==
'     
'     The restored byte array:
'        02-04-06-08-0A-0C-0E-10-12-14

Di seguito è riportato un esempio più complesso che consente di creare una matrice di 20 elementi di interi a 32 bit.The following is a more complex example that creates a 20-element array of 32-bit integers. Viene quindi usato il BitConverter.GetBytes(Int32) metodo per convertire ogni elemento in una matrice di byte, che archivia nella posizione appropriata in un buffer chiamando il Array.Copy(Array, Int32, Array, Int32, Int32) metodo.It then uses the BitConverter.GetBytes(Int32) method to convert each element into a byte array, which it stores in the appropriate position in a buffer by calling the Array.Copy(Array, Int32, Array, Int32, Int32) method. Questo buffer viene quindi passato al ToBase64String(Byte[]) metodo per creare una stringa UUEncoded (base-64).This buffer is then passed to the ToBase64String(Byte[]) method to create a UUencoded (base-64) string. Viene quindi chiamato il FromBase64String(String) metodo per decodificare la stringa UUEncoded e viene chiamato BitConverter.ToInt32 il metodo per convertire ogni set di quattro byte (la dimensione di un intero a 32 bit) in un valore integer.It then calls the FromBase64String(String) method to decode the UUencoded string, and calls the BitConverter.ToInt32 method to convert each set of four bytes (the size of a 32-bit integer) to an integer. L'output dell'esempio mostra che la matrice originale è stata ripristinata correttamente.The output from the example shows that the original array has been successfully restored.

using System;

public class Example
{
   public static void Main()
   {
      // Define an array of 20 elements and display it.
      int[] arr = new int[20]; 
      int value = 1;
      for (int ctr = 0; ctr <= arr.GetUpperBound(0); ctr++) {
         arr[ctr] = value;
         value = value * 2 + 1;
      }
      DisplayArray(arr);

      // Convert the array of integers to a byte array.
      byte[] bytes = new byte[arr.Length * 4];
      for (int ctr = 0; ctr < arr.Length; ctr++) {
         Array.Copy(BitConverter.GetBytes(arr[ctr]), 0, 
                    bytes, ctr * 4, 4);
      }
         
      // Encode the byte array using Base64 encoding
      String base64 = Convert.ToBase64String(bytes);
      Console.WriteLine("The encoded string: ");
      for (int ctr = 0; ctr <= base64.Length / 50; ctr++) 
         Console.WriteLine(base64.Substring(ctr * 50, 
                                            ctr * 50 + 50 <= base64.Length 
                                               ? 50 : base64.Length - ctr * 50));
      Console.WriteLine();
      
      // Convert the string back to a byte array.
      byte[] newBytes = Convert.FromBase64String(base64);

      // Convert the byte array back to an integer array.
      int[] newArr = new int[newBytes.Length/4];
      for (int ctr = 0; ctr < newBytes.Length / 4; ctr ++)
         newArr[ctr] = BitConverter.ToInt32(newBytes, ctr * 4);
         
      DisplayArray(newArr);
   }

   private static void DisplayArray(Array arr)
   {
      Console.WriteLine("The array:");
      Console.Write("{ ");
      for (int ctr = 0; ctr < arr.GetUpperBound(0); ctr++) {
         Console.Write("{0}, ", arr.GetValue(ctr));
         if ((ctr + 1) % 10 == 0) 
            Console.Write("\n  ");
      }
      Console.WriteLine("{0} {1}", arr.GetValue(arr.GetUpperBound(0)), "}");
      Console.WriteLine();
   }
}
// The example displays the following output:
// The array:
// { 1, 3, 7, 15, 31, 63, 127, 255, 511, 1023,
//   2047, 4095, 8191, 16383, 32767, 65535, 131071, 262143, 524287, 1048575 }
// 
// The encoded string:
// AQAAAAMAAAAHAAAADwAAAB8AAAA/AAAAfwAAAP8AAAD/AQAA/w
// MAAP8HAAD/DwAA/x8AAP8/AAD/fwAA//8AAP//AQD//wMA//8H
// 
// The array:
// { 1, 3, 7, 15, 31, 63, 127, 255, 511, 1023,
//   2047, 4095, 8191, 16383, 32767, 65535, 131071, 262143, 524287, 1048575 }
Module Example
   Public Sub Main()
      ' Define an array of 20 elements and display it.
      Dim arr(19) As Integer 
      Dim value As Integer = 1
      For ctr As Integer = 0 To arr.GetUpperBound(0)
         arr(ctr) = value
         value = value * 2 + 1
      Next
      DisplayArray(arr)

      ' Convert the array of integers to a byte array.
      Dim bytes(arr.Length * 4 - 1) As Byte 
      For ctr As Integer = 0 To arr.Length - 1
         Array.Copy(BitConverter.GetBytes(arr(ctr)), 0, 
                    bytes, ctr * 4, 4)
      Next
         
      ' Encode the byte array using Base64 encoding
      Dim base64 As String = Convert.ToBase64String(bytes)
      Console.WriteLine("The encoded string: ")
      For ctr As Integer = 0 To base64.Length \ 50 - 1 
         Console.WriteLine(base64.Substring(ctr * 50, 
                                            If(ctr * 50 + 50 <= base64.Length, 
                                               50, base64.Length - ctr * 50)))
      Next
      Console.WriteLine()
      
      ' Convert the string back to a byte array.
      Dim newBytes() As Byte = Convert.FromBase64String(base64)

      ' Convert the byte array back to an integer array.
      Dim newArr(newBytes.Length\4 - 1) As Integer
      For ctr As Integer = 0 To newBytes.Length \ 4 - 1
         newArr(ctr) = BitConverter.ToInt32(newBytes, ctr * 4)
      Next   
      DisplayArray(newArr)
   End Sub

   Private Sub DisplayArray(arr As Array)
      Console.WriteLine("The array:")
      Console.Write("{ ")
      For ctr As Integer = 0 To arr.GetUpperBound(0) - 1
         Console.Write("{0}, ", arr.GetValue(ctr))
         If (ctr + 1) Mod 10 = 0 Then Console.Write("{0}  ", vbCrLf)
      Next
      Console.WriteLine("{0} {1}", arr.GetValue(arr.GetUpperBound(0)), "}")
      Console.WriteLine()
   End Sub
End Module
' The example displays the following output:
'     The array:
'     { 1, 3, 7, 15, 31, 63, 127, 255, 511, 1023,
'       2047, 4095, 8191, 16383, 32767, 65535, 131071, 262143, 524287, 1048575 }
'     
'     The encoded string:
'     AQAAAAMAAAAHAAAADwAAAB8AAAA/AAAAfwAAAP8AAAD/AQAA/w
'     MAAP8HAAD/DwAA/x8AAP8/AAD/fwAA//8AAP//AQD//wMA//8H
'     
'     The array:
'     { 1, 3, 7, 15, 31, 63, 127, 255, 511, 1023,
'       2047, 4095, 8191, 16383, 32767, 65535, 131071, 262143, 524287, 1048575 }

Commenti

Gli elementi di inArray vengono considerati come valori numerici e convertiti in una rappresentazione di stringa codificata con cifre base-64.The elements of inArray are taken as a numeric value and converted to a string representation that is encoded with base-64 digits.

Le cifre in base 64 in ordine crescente da zero sono i caratteri maiuscoli da "A" a "Z", i caratteri minuscoli "a" a "z", i numeri "0" a "9" e i simboli "+" e "/".The base-64 digits in ascending order from zero are the uppercase characters "A" to "Z", the lowercase characters "a" to "z", the numerals "0" to "9", and the symbols "+" and "/". Il carattere non valore, "=", viene utilizzato per la spaziatura interna finale.The valueless character, "=", is used for trailing padding.

Importante

Il ToBase64String metodo è progettato per elaborare una matrice a byte singolo contenente tutti i dati da codificare.The ToBase64String method is designed to process a single byte array that contains all the data to be encoded. Per codificare i dati da un flusso, System.Security.Cryptography.ToBase64Transform usare la classe.To encode data from a stream, use the System.Security.Cryptography.ToBase64Transform class.

In genere, il ToBase64String metodo non viene utilizzato per eseguire il round trip di una stringa UUEncoded (base 64 codificata).Ordinarily, the ToBase64String method is not used to round-trip a UUEncoded (base-64 encoded) string. Ovvero, se si decodifica una stringa chiamando il FromBase64String metodo, quindi si codifica la matrice di byte restituita chiamando il ToBase64String metodo, la stringa risultante non sarà necessariamente identica alla stringa originale.That is, if you decode a string by calling the FromBase64String method, then encode the returned byte array by calling the ToBase64String method, the resulting string will not necessarily be identical to the original string. La stringa viene sottoponita a round trip solo se la stringa originale è una stringa con codifica base 64 valida.The string will round-trip only if the original string is a valid base-64 encoded string.

Vedi anche

ToBase64String(ReadOnlySpan<Byte>, Base64FormattingOptions) ToBase64String(ReadOnlySpan<Byte>, Base64FormattingOptions) ToBase64String(ReadOnlySpan<Byte>, Base64FormattingOptions)

public static string ToBase64String (ReadOnlySpan<byte> bytes, Base64FormattingOptions options = System.Base64FormattingOptions.None);
static member ToBase64String : ReadOnlySpan<byte> * Base64FormattingOptions -> string
Public Shared Function ToBase64String (bytes As ReadOnlySpan(Of Byte), Optional options As Base64FormattingOptions = System.Base64FormattingOptions.None) As String

Parametri

Restituisce

Si applica a