| Description |
If the current stream has not been exhausted, the next byte is returned.
The stream position is updated accordingly.
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| Microsoft MSDN Links |
System.IO
System.IO.BinaryReader
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| Reading a single byte at a time |
program Project1;
{$APPTYPE CONSOLE}
uses
System.IO;
var
MyFileStream : System.IO.FileStream;
MyFileWriter : System.IO.BinaryWriter;
MyFileReader : System.IO.BinaryReader;
SingleByte : 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(12);
MyFileWriter.Write(34);
MyFileWriter.Write('ABC'); // Chr(65) Chr(66) Chr(67)
// 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
try
// Infinite loop - we rely on the exception for file end
while 1 = 1 do
begin
SingleByte := MyFileReader.ReadByte;
Console.WriteLine(SingleByte.ToString);
end;
except
On E : EndOfStreamException do
Console.WriteLine('File display completed');
end;
// Close the reader and the stream
MyFileReader.Close;
MyFileStream.Close;
Console.Readline;
end.
| | Show full unit code | 12
34
3
65
66
67
File display completed
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