[SOLVED]Lnet's LTCPComponent.Connect() the result always is True
lazarus / 38-Networking and Web Programming

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lyink · 2014-03-23 15:02

Hi everyone.
I was wrote a  ChatClient with Lnet's LTCPComponent.
and i found out the Connect() function is always return True，Whether
the server has no open。
test like:

Code: [Select]procedure TForm1.Button1Click(Sender: TObject);
begin
  if LTCPComponent1.Connect('127.0.0.1',random(5000)) then
  begin
    caption:='is Connected';
  end;
end; 
Can you make a suggestion for me? which networking component is easy
to use and stable.
thanks!

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bambamns · 2014-03-24 02:34

Hi,

LNet is very stable - I use it on many different project, platforms
and devices for many years.

LTCPComponent1.Connect is to make connection, but if you wont to check
connection try to use LTCPComponent1.Connected.

In TCP/IP connection you have to wait for server/client "handshaking"
, so make an loop (while .... do) for a second , or two and then check
if connection is connected.

You can use some other events like OnConnect or OnAccept.

More details on http://lnet.wordpress.com/usage/usage-guide/.

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lyink · 2014-03-24 12:51

Quote from: bambamns on March 24, 2014, 03:34:19 amHi,

LNet is very stable - I use it on many different project, platforms
and devices for many years.

LTCPComponent1.Connect is to make connection, but if you wont to check
connection try to use LTCPComponent1.Connected.

In TCP/IP connection you have to wait for server/client "handshaking"
, so make an loop (while .... do) for a second , or two and then check
if connection is connected.

You can use some other events like OnConnect or OnAccept.

More details on http://lnet.wordpress.com/usage/usage-guide/.
Thanks for you answer,It's my falut. i was misunderstoode Lnet.