delphi TByteArray 装换成base64

unit EncodingUtil;

interface

uses
  SysUtils, Classes, Types, EncdDecd;

function BytesToBase64(const bytes: TByteArray): string;
function StreamToBase64(AStream: TStream): string;

implementation

function BytesToBase64(const bytes: TByteArray): string;
var
  memoryStream: TMemoryStream;
begin
  memoryStream := TMemoryStream.Create;
  memoryStream.WriteBuffer(bytes[0], Length(bytes));
  memoryStream.Seek(0, soFromBeginning);
  Result := StreamToBase64(memoryStream);
  memoryStream.Free;
end;

function StreamToBase64(AStream: TStream): string;
var
  objSS: TStringStream;
begin
  objSS := TStringStream.Create('');
  try
    EncodeStream(AStream, objSS); // Delphi7 自带unit EncdDecd的方法
    Result := objSS.DataString;
  finally
    FreeAndNil(objSS);
  end;
end;
end.