SysUtils.ExtractRelativePath Function

Returns a relative path name, relative to a specific base directory.

Pascal

function ExtractRelativePath(const BaseName: string; const DestName: string): string; overload;

C++

AnsiString ExtractRelativePath(const AnsiString BaseName, const AnsiString DestName);

File

SysUtils

Description

Call ExtractRelativePath to convert a fully qualified path name into a relative path name. The DestName parameter specifies file name (including path) to be converted. BaseName is the fully qualified name of the base directory to which the returned path name should be relative. BaseName may or may not include a file name, but it must include the final path delimiter.

Note: If you send it what should be a directory without the trailing backslash (c:\foo

instead of c:\foo\), the function treats foo as a file and returns undesirable results. You should correctly call it like this:

Copy Code

ExtractRelativePath('c:\foo\', 'c:\bar\')

so that it would return

Copy Code

'..\bar\'

Copy Code

ExtractRelativePath('c:\foo\', 'c:\bar')

would return the incorrect result, probably like

Copy Code

'..'