<div>
var 
&nbsp; F: TFileStream; 
 
F := TFileStream.Create('filename.abc', fmOpenRead) 
 
is similar to 
 
AssignFile 
Reset 
 
F := TFileStream.Create('filename.abc', fmOpenWrite) 
 
is similar to using Rewrite 
 
and F := TFileStream.Create('filename.abc', fmOpenReadWrite or fmCreate) 
 
will create the file if it does not exists, but if it does, will open it similar to Reset 
 
let's say you have a record 
 
type 
&nbsp; TMyRec = record 
&nbsp; &nbsp; A, B, C: Integer; 
&nbsp; end; 
 
var 
&nbsp; MyRec: TMyRec; 
 
to read from stream to record: 
 
F.ReadBuffer(MyRec, SizeOf(TMyRec)); 
 
and to write 
 
F.WriteBuffer(MyRec, SizeOf(TMyRec)); 
 
F.Size is similar to FileSize, and F.Position tells you where the record pointer is. 
 
more examples... check the help file?
</div>

var
  F: TFileStream;

F := TFileStream.Create('filename.abc', fmOpenRead)

is similar to

AssignFile
Reset

F := TFileStream.Create('filename.abc', fmOpenWrite)

is similar to using Rewrite

and F := TFileStream.Create('filename.abc', fmOpenReadWrite or fmCreate)

will create the file if it does not exists, but if it does, will open it similar to Reset

let's say you have a record

type
  TMyRec = record
    A, B, C: Integer;
  end;

var
  MyRec: TMyRec;

to read from stream to record:

F.ReadBuffer(MyRec, SizeOf(TMyRec));

and to write

F.WriteBuffer(MyRec, SizeOf(TMyRec));

F.Size is similar to FileSize, and F.Position tells you where the record pointer is.

more examples... check the help file?

<div>
to read/wrte as string you can cast it to TStringStream
</div>

to read/wrte as string you can cast it to TStringStream

<div>
<div class="content wysiwyg-content">
How can I use TFileStream.create instead of the tradition assignFile and reset or rewrite for typed and untyped files? 
Can I read the stream into a simple record/string and write from the record/string? 
And finally, where can I found some examples of how to do it? 
 
Thanks very much, 
Libby 
 
 

</div>
</div>

How can I use TFileStream.create instead of the tradition assignFile and reset or rewrite for typed and untyped files?
Can I read the stream into a simple record/string and write from the record/string?
And finally, where can I found some examples of how to do it?

Thanks very much,
Libby




TFileStream

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