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Convert.ToBase64String Method (Byte[])

Converts the value of an array of 8-bit unsigned integers to its equivalent String representation encoded with base 64 digits.

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

'Declaration
Public Shared Function ToBase64String ( _
	inArray As Byte() _
) As String
'Usage
Dim inArray As Byte()
Dim returnValue As String

returnValue = Convert.ToBase64String(inArray)
public static String ToBase64String (
	byte[] inArray
)
public static function ToBase64String (
	inArray : byte[]
) : String

Parameters

inArray

An array of 8-bit unsigned integers.

Return Value

The String representation, in base 64, of the contents of inArray.

Exception typeCondition

ArgumentNullException

inArray is a null reference (Nothing in Visual Basic).

The elements of inArray are taken as a numeric value and converted to a String representation encoded with base 64 digits.

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 '/'. The valueless character, '=', is used for trailing padding.

The following code example demonstrates using the ToBase64CharArray method to UUencode (encode in base 64) a binary stream, then save the encoding to a file.

Public Sub EncodeWithString()
   Dim inFile As System.IO.FileStream
   Dim binaryData() As Byte

   Try
      inFile = New System.IO.FileStream(inputFileName, _
                                        System.IO.FileMode.Open, _
                                        System.IO.FileAccess.Read)
      ReDim binaryData(inFile.Length)
      Dim bytesRead As Long = inFile.Read(binaryData, _
                                          0, _
                                          inFile.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 binary input into Base64 UUEncoded output.
   Dim base64String As String
   Try
      base64String = System.Convert.ToBase64String(binaryData, _
                                                   0, _
                                                   binaryData.Length)
   Catch exp As System.ArgumentNullException
      System.Console.WriteLine("Binary data array is null.")
      Return
   End Try

   ' Write the UUEncoded version to the output file.
   Dim outFile As System.IO.StreamWriter
   Try
      outFile = New System.IO.StreamWriter(outputFileName, _
                                           False, _
                                           System.Text.Encoding.ASCII)
      outFile.Write(base64String)
      outFile.Close()
   Catch exp As System.Exception
      ' Error creating stream or writing to it.
      System.Console.WriteLine("{0}", exp.Message)
   End Try
End Sub

public void EncodeWithString()
{
    System.IO.FileStream inFile;
    ubyte binaryData[];

    try {
        inFile = new System.IO.FileStream(inputFileName,
                                          System.IO.FileMode.Open,
                                          System.IO.FileAccess.Read);

        binaryData = new ubyte[(int)inFile.get_Length()];

        long bytesRead = inFile.Read(binaryData,
                                     0, (int)(inFile.get_Length()));

        inFile.Close();
    }
    catch (System.Exception exp) {
        // Error creating stream or reading from it.
        System.Console.WriteLine("{0}", exp.get_Message());
        return;
    }

    // Convert the binary input into Base64 UUEncoded output.
    String base64String;

    try {
        base64String = System.Convert.ToBase64String(binaryData, 
                                                     0, binaryData.length);
    }
    catch (System.ArgumentNullException exp) {
        System.Console.WriteLine("Binary data array is null.");
        return;
    }

    // Write the UUEncoded version to the output file.
    System.IO.StreamWriter outFile;

    try {
        outFile = new System.IO.StreamWriter(
                outputFileName, false, System.Text.Encoding.get_ASCII());
        outFile.Write(base64String);
        outFile.Close();
    }
    catch (System.Exception exp) {
        // Error creating stream or writing to it.
        System.Console.WriteLine("{0}", exp.get_Message());
    }
} //EncodeWithString

Windows 98, Windows 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see System Requirements.

.NET Framework

Supported in: 2.0, 1.1, 1.0

.NET Compact Framework

Supported in: 2.0

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