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...use TMemoryStream to save data?
Autor: Damian Gorski
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Tip Rating (8):  
     


{Think of memory stream as a file that is located in memory.  So the writes
are very similar to the write command for files.  (Actually it is closer to
the blockwrite command.)}

{To put a string the slow way you could do the following:}

    
for i := 1 to Length(s) do memstream.Write(s[i], 1);

{That would write the string one character at a time.  Simple and easy to
understand, but a bit slow.  A faster way would be to do the following:}

    
memstream.Write(s[1], Length(s));

{The two lines do the same thing, they append characters to the stream. If
you have never done a seek on the stream, they just append to the end.}

{Now to handle the line feeds you have to add them yourself:}

    
memstream.Write(#13, 1);
    memstream.Write(#10, 1);

{Or you could do some sneaky things like this:}

    
procedure StreamWriteStr(var ms: TMemoryStream; s: string);
    begin
        
ms.Write(s[1], Length(s));
    end;

    procedure StreamWriteLnStr(var ms: TMemoryStream; s: string);
    begin
        
StreamWriteStr(ms, s + #13#10);
    end;

{Or you could create you own descendant class of TMemoryStream with a method
to write strings.}

 

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