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7.0

ClientSocket can't connect

Asked by WizardsHat in Delphi Programming

Tags: clientsocket

Hi all,

that's the situation:

My server program is open and listening.
My client program starts with a wrong hostname. Then I change the hostname at runtime to the correct one, and it immediately raises an ESocketError on API 'connect'. So it found the server socket, but couldn't connect for some reason.
(when I change the hostname to anther wrong hostname at runtime, it will take a few seconds and then raise an Exception with an Windows Socket Error on API 'ASyncLookup'.)
When I start the client program with the correct hostname, it DOES connect.
As far as I can see, my code is exactly the same.

WMNEWSERVER is called when ServerName is already the new host name.

procedure TFoClient.WMNEWSERVER (var Msg: TMsg);
begin
  if ClieSock.Active then
    ClieSock.Active := false;

  ClieSock.Host := ServerName;
  ClieSock.Port := 1300;
  ClieSock.Active := true;
end;

procedure TFoClient.FormCreate(Sender: TObject);
begin
...
  ClieSock.Host := ServerName;
  ClieSock.Port := 1300;
  ClieSock.Active := true;
end;


Another thing is that my ClientSocket never gets to TClientSocket.OnError but raises an exception FIRST. Maybe this is somehow related?


Thanks for any help,
Fran
[+][-]01/13/03 11:24 PM, ID: 7723344Accepted Solution

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About this solution

Zone: Delphi Programming
Tags: clientsocket
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Solution Provided By: tyfing
Participating Experts: 1
Solution Grade: A
 
[+][-]01/13/03 08:40 PM, ID: 7722752Expert Comment

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