Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people, just like you, are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
Solved

HOW TO USE: TIDTCPCLIENT1.CheckForDisconnect() and TIDTCPCLIENT1.CheckResponse()

Posted on 2006-07-04
1
2,032 Views
Last Modified: 2012-05-05
how to use this functions below, somebody can give a example:

TIDTCPCLIENT1.CheckForDisconnect();
TIDTCPCLIENT1.CheckForGracefulDisconnect();
TIDTCPCLIENT1.CheckResponse()
0
Comment
Question by:rafaelrgl
1 Comment
 
LVL 17

Accepted Solution

by:
TheRealLoki earned 500 total points
ID: 17039701
TIDTCPCLIENT1.CheckForDisconnect();
is used internally in the "Connected" property (and therfore also in the "Disconnect" method)
and various "Read" methods.
You do not need to call this yourself.

TIDTCPCLIENT1.CheckForGracefulDisconnect();
Determines if the peer has been gracefully disconnected
it calls ReadFromStack with a very short timeout, which subsequently validates the connection.
It is safe to call this before a Read, but you can still get a disconnect while receiving data
e.g.
try
  IdTCPClient1.CheckForGracefulDisconnect(true);
  S := IdTCPClient1.ReadLn;

this could return the following exceptions
except
  on EIdConnClosedGracefully do // connection closed gracefully
  on EIdNotConnected: // not connected....
end;


TIDTCPCLIENT1.CheckResponse()
  this just looks to see if 1 smallint is in an array of allowed smallints
e.g. if "2" is in [0,1,3,4,5]
I've only ever seen this used internally by Indy, but it's a compact function that you could use for your own purposes, although I don't see any obvious place in the Indy stuff I do.
0

Featured Post

Free Tool: Site Down Detector

Helpful to verify reports of your own downtime, or to double check a downed website you are trying to access.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Title # Comments Views Activity
Virtuailstring tree compare node issue 14 125
FMX StringGrid1->Canvas->FillRect Problem 3 169
When i run adoquery my application freezes 26 178
Delphi problems to abort a printjob 9 24
Objective: - This article will help user in how to convert their numeric value become words. How to use 1. You can copy this code in your Unit as function 2. than you can perform your function by type this code The Code   (CODE) The Im…
In my programming career I have only very rarely run into situations where operator overloading would be of any use in my work.  Normally those situations involved math with either overly large numbers (hundreds of thousands of digits or accuracy re…

766 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question