This topic has not yet been rated - Rate this topic

Convert.ToBase64String Method (Byte[], Int32, Int32)

.NET Framework 4.5

Converts a subset of an array of 8-bit unsigned integers to its equivalent string representation that is encoded with base-64 digits. Parameters specify the subset as an offset in the input array, and the number of elements in the array to convert.

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

Syntax

C++

static member ToBase64String : 
        inArray:byte[] * 
        offset:int * 
        length:int -> string

Parameters

inArray: Type: System.Byte[]
An array of 8-bit unsigned integers.

offset: Type: System.Int32
An offset in inArray.

length: Type: System.Int32
The number of elements of inArray to convert.

Return Value

Type: System.String
The string representation in base 64 of length elements of inArray, starting at position offset.

Exceptions

Exception	Condition
ArgumentNullException	inArray is a null reference (Nothing in Visual Basic).
ArgumentOutOfRangeException	offset or length is negative. -or- offset plus length is greater than the length of inArray.

Exception

Condition

ArgumentNullException

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

ArgumentOutOfRangeException

offset or length is negative.

-or-

offset plus length is greater than the length of inArray.

Remarks

The elements of inArray are taken as a numeric value and converted to a string representation in base 64.

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 offset and length parameters are 32-bit signed numbers. The offset parameter is zero-based.

Important
The ToBase64String method is designed to process a single byte array that contains all the data to be encoded. To encode data from a stream, use the System.Security.Cryptography.ToBase64Transform class.

Version Information

.NET Framework

Supported in: 4.5, 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Portable Class Library

Supported in: Portable Class Library

.NET for Windows Store apps

Supported in: Windows 8

Platforms

Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

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

Reference

Convert Class

ToBase64String Overload

System Namespace

FromBase64String

System.Security.Cryptography.ToBase64Transform

Did you find this helpful? Yes No

Not accurate

Not enough depth

Need more code examples

(1500 characters remaining)