| Description |
If the current stream has not been exhausted, a string is returned. The next byte in the string holds the string length (in the first 7 bits), folowed by the string in the following bytes.
The stream position is updated accordingly.
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| Microsoft MSDN Links |
System.IO
System.IO.BinaryReader
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| A simple example |
program Project1;
{$APPTYPE CONSOLE}
uses
System.IO;
var
MyFileStream : System.IO.FileStream;
MyFileWriter : System.IO.BinaryWriter;
MyFileReader : System.IO.BinaryReader;
MyString : String;
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('ABC');
MyFileWriter.Write(3); // Simulated string length
MyFileWriter.Write('D'); // String of 3 characters
MyFileWriter.Write('E');
MyFileWriter.Write('F');
// 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);
// Try to read String values from the file
try
while 1 = 1 do
begin
MyString := MyFileReader.ReadString;
Console.WriteLine(MyString);
end;
except
On E : Exception do
Console.WriteLine('End of file');
end;
// Close the reader and the stream
MyFileReader.Close;
MyFileStream.Close;
Console.Readline;
end.
| | Show full unit code | ABC
DEF
End of file
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