Delphi in a Nutshell

Name

Flush Procedure

Syntax

procedure Flush(var F: TextFile);

Description

The Flush procedure forces the output of buffered text to a text file that was opened for writing (with Append or Rewrite). By default, a text file accumulates a line of text before writing the text to the file. Flush is not a real procedure.

Tips and Tricks

Flush flushes Delphi’s buffer, not the operating system’s buffer. To make sure all data is safely stored, close the file.

Errors

• If the file is not open, Flush reports I/O error 103.

• If Flush cannot write the text, perhaps because the disk is full, it reports the Windows error code as an I/O error.

• You can call Flush on an input file (opened with Reset), but the function does nothing.

See Also

IOResult Function, Rewrite Procedure, TextFile Type, Write Procedure, WriteLn Procedure