1 procedure AssignFile ( var FileHandle : TextFile; const FileName : string ) ;
2 procedure AssignFile ( var FileHandle : File; const FileName : string ) ;
Description
The AssignFile procedure assigns a value to FileHandle 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.
Notes
The FileHandle must no be confused with the file handle used for the low level file handling routines such as FileOpen and FileRead.
Related commands
Append Open a text file to allow appending of text to the end
AssignPrn Treats the printer as a text file - an easy way of printing text
File Defines a typed or untyped file
Reset Open a text file for reading, or binary file for read/write
ReWrite Open a text or binary file for write access
TextFile Declares a file type for storing lines of text
Example code : Write to a text file, and then read back its contents
var
myFile : TextFile;
text : string;
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 the file for reading
Reset(myFile);
// Display the file contents
while not Eof(myFile) do
begin
ReadLn(myFile, text);
ShowMessage(text);
end;
// Close the file for the last time
CloseFile(myFile);
end;
Show full unit code
Hello
World