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| Closing a BinaryWriter and BinaryReader |
program Project1;
{$APPTYPE CONSOLE}
uses
System.IO;
var
MyFileStream : System.IO.FileStream;
MyFileWriter : System.IO.BinaryWriter;
MyFileReader : System.IO.BinaryReader;
CharAsByte : Byte;
begin
// Create and open our binary file as a stream
MyFileStream := System.IO.File.Open('C:DelphiBasics.txt',
System.IO.FileMode.Create);
// Create a BinaryWriter to allow writing to this file
MyFileWriter := System.IO.BinaryWriter.Create(MyFileStream);
// Write to the file
MyFileWriter.Write('A');
MyFileWriter.Write('BCD');
MyFileWriter.Write(175);
// Close the writer and the stream
MyFileWriter.Close;
MyFileStream.Close;
// Reopen the stream for reading
MyFileStream := System.IO.File.Open('C:DelphiBasics.txt',
System.IO.FileMode.Open);
// Create a BinaryReader to allow the file to be read back
MyFileReader := System.IO.BinaryReader.Create(MyFileStream);
// Display the file contents
// Note : We must look for the 'EndOfStreamException'
// when using ReadByte to know when we are done
try
while 1 <> 0 do
begin
CharAsByte := MyFileReader.ReadByte;
Console.WriteLine('{0:X}', TObject(CharAsByte));
end;
except
On E : EndOfStreamException do
Console.WriteLine('End of file encountered');
end;
// Close the reader and the stream
MyFileReader.Close;
MyFileStream.Close;
Console.Readline;
end.
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AF
End of file encountered
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