Delphi Basics : ChangeFileExt command

DelphiBasics

ChangeFileExt
Function

Change the extension part of a file name

SysUtils unit

function ChangeFileExt(const FileName, Extension string):string;

Description

The ChangeFileExt function changes the Extension value of a file FileName, returning the new value as a string.

Related commands

ExtractFileExt		Extracts the extension part of a full file name
ProcessPath		Split a drive/path/filename string into its constituent parts

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Example code : Renaming Unit1.dcu to Unit1.old

var
  oldName, newName : string;

begin
  // Try to rename the current Unit1.dcu to Uni1.old
  oldName := 'Unit1.dcu';
  newName := ChangeFileExt(oldName, '.new');

  // Show the old and new values
  ShowMessage('Old name = '+oldName);
  ShowMessage('New name = '+newName);
end;

Show full unit code

Old name = Unit1.dcu
New name = Unit1.new