delphi textfile code example

Example 1: How to read text files in delphi

var
  Form1: TForm1;
 
implementation
{$R *.dfm} // Include form definitions
 
procedure TForm1.FormCreate(Sender: TObject);
var
  fileName : string;
  myFile   : TextFile;
  data     : string;

begin
  // Try to open a text file for writing to
  fileName := 'Test.txt';
  AssignFile(myFile, fileName);
  ReWrite(myFile);

  // Write to the file
  Write(myFile, 'Hello World');

  // Close the file
  CloseFile(myFile);

  // Reopen the file in read mode
  Reset(myFile);

  // Display the file contents
  while not Eof(myFile) do
  begin
    ReadLn(myFile, data);
    ShowMessage(data);
  end;

  // Close the file for the last time
  CloseFile(myFile);

  // Now see if the file exists
  if fileexists(fileName)
  then ShowMessage(fileName+' exists OK')
  else ShowMessage(fileName+' does not exist');

  // Delete the file and look again
  DeleteFile(fileName);
  if fileexists(fileName)
  then ShowMessage(fileName+' still exists!')
  else ShowMessage(fileName+' no longer exists');
end;
 
end.

Example 2: create text file delphi

procedure MakeAStringlistAndSaveThat;
var
  MyText: TStringlist;
begin
  MyText:= TStringlist.create;
  try
    MyText.Add('line 1');
    MyText.Add('line 2');
    MyText.SaveToFile('c:\folder\filename.txt');
  finally
    MyText.Free
  end; {try}
end;