AssignFile

The AssignFile procedure assigns a value for a FileName in preparation for reading or writing to that file.

Version 1

Takes a text file variable type as the handle. The file is treated as a textfile when opened. If the file name is an empty string, then file access is made to the console standard input and output streams.

Version 2

Takes a binary file variable type as the handle. The file is treated as a binary file.

In both cases, when the file is opened by Append, Reset or ReWrite, it is assumed to be in the current directory.

Example:

var
 myFile : TextFile;

begin
 // Try to open the Test.txt file for writing to
 AssignFile(myFile, 'Test.txt');
 ReWrite(myFile);

 // Write a couple of well known words to this file
 WriteLn(myFile, 'Hello');
 WriteLn(myFile, 'World');

 // Close the file
 CloseFile(myFile);

 // Reopen to append a final line to the file
 Append(myFile);

 // Write this final line
 WriteLn(myFile, 'Final line added');

 // Close the file
 CloseFile(myFile);

 // Reopen the file for reading
 Reset(myFile);

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

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

end;