未声明的标识符TEncoding delphi7

Question

Hi i want to use TEncoding to convert Tbytes to utf7 but when i use TEncoding delphi gives following error.

Undeclared identifier: 'TEncoding'

i am using delphi 7.

what to do??

Answer 1

TEncoding是在Delphi 2009中引入的。您应该升级到较新版本的Delphi，例如XE。

Answer 2

The SysUtils.TEncoding class is not available in D7. Use the Win32 API MultiByteToWideChar() and WideCharToMultiByte() functions instead, specifying CP_UTF7 as the codepage.