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Convert.ToBase64String Method (Byte[])

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

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

public static string ToBase64String (
	byte[] inArray
)
public static String ToBase64String (
	byte[] inArray
)
public static function ToBase64String (
	inArray : byte[]
) : String
Not applicable.

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

    try {
        inFile = new System.IO.FileStream(inputFileName,
                                          System.IO.FileMode.Open,
                                          System.IO.FileAccess.Read);
        binaryData = new Byte[inFile.Length];
        long bytesRead = inFile.Read(binaryData, 0,
                                    (int)inFile.Length);
        inFile.Close();
    }
    catch (System.Exception exp) {
        // Error creating stream or reading from it.
        System.Console.WriteLine("{0}", exp.Message);
        return;
    }

    // Convert the binary input into Base64 UUEncoded output.
    string base64String;
    try {
         base64String = 
            System.Convert.ToBase64String(binaryData, 
                                          0,
                                          binaryData.Length);
    }
    catch (System.ArgumentNullException) {
        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.ASCII);             
        outFile.Write(base64String);
        outFile.Close();
    }
    catch (System.Exception exp) {
        // Error creating stream or writing to it.
        System.Console.WriteLine("{0}", exp.Message);
    }
}

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 Server 2000 SP4, Windows Millennium Edition, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

.NET Framework

Supported in: 3.0, 2.0, 1.1, 1.0

.NET Compact Framework

Supported in: 2.0

XNA Framework

Supported in: 1.0
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