I want it to be read as data comes in (onevent) not have to wait after sending something each time
Tom
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TTcpClient problem cant recieve anything
Hey, Im having a problem where I connect to 127.0.0.1 on port 666 using the function in button1 then onconnect i get a message saying it connects just fine. Now button2 sends the character 'F' and its supposed to get a bunch of data back. Well the TcpClient1Recieve function never gets called... why?
if i do
telnet 127.0.0.1 666
F
GOT:F
it works just fine.
Now what am i doing wrong? and please dont tell me to work around it by using indy or whatever else.
Tom
procedure TForm1.Button1Click(Sender
begin
TcpClient1.Connect
end;
procedure TForm1.TcpClient1Receive(S
var DataLen: Integer);
begin
showmessage('GOTDATABACK')
end;
procedure TForm1.TcpClient1Connect(S
begin
ShowMessage('Connected');
end;
procedure TForm1.Button2Click(Sender
begin
TcpClient1.Sendln('F');
end;
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Answers
The way indy works is that a client invokes an action on a server, because of this the client has no direct way of activating when it receives data. You can get round this by using a timer
set up a timer, say 500ms and then on the timer do
this if for INDY 9
var
lMsg: string;
begin
Timer1.Enabled:=false;
lMsg:=idTCPClient1.ReadLn;
if lMsg<>'' then
begin
{process your message here}
end;
Timer1.Enabled:=true;
end;
for Indy 10 which I haven't got installed I think you need
var
lMsg: string;
begin
Timer1.Enabled:=false;
lMsg:=idTCPClient1.IOHandl
if lMsg<>'' then
begin
{process your message here}
end;
Timer1.Enabled:=true;
end;
regards
try this:
procedure TForm1.Timer1Timer(Sender:
begin
If idtcpclient1.Connected then Begin
IdTCPClient1.CheckForGrace
If not IdTCPClient1.IOHandler.Inp
End;
end;
NB: It uses a timer event to check if there is data to read, if there is, it reads it...
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by: pcsentinelPosted on 2006-04-06 at 05:17:36ID: 16390942
var
lResult: string;
begin
TcpClient1.Sendln('F');
lResult:=TcpClient1.ReadLn
end;