Thread View: borland.public.cppbuilder.internet.socket
6 messages
6 total messages
Started by Emmanuel
Thu, 29 Nov 2007 14:30
BUG for TClientSocket and TClientDataSet
Author: Emmanuel
Date: Thu, 29 Nov 2007 14:30
Date: Thu, 29 Nov 2007 14:30
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Whenever using a TClientSocket and TClientDataSet (Socket Server) at the same time eg: ClientSocket->Open(); ...... ClientDataSet->Open(); error must be occured class EvariantInvalidArgError with message 'Invalid argument' class ESocketConnectionError with message 'Error reading form socket' if ClientSocket don't open, this is no error How can I solve it??????? Help
Re: BUG for TClientSocket and TClientDataSet
Author: Remy Lebeau (TeamB)
Date: Fri, 30 Nov 2007 03:32
Date: Fri, 30 Nov 2007 03:32
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"Emmanuel" <emmanuel@erphk.com> wrote in message news:474ecbea@newsgroups.borland.com... > Whenever using a TClientSocket and TClientDataSet > (Socket Server) at the same time > eg: > > ClientSocket->Open(); > ...... > ClientDataSet->Open(); > > error must be occured > > class EvariantInvalidArgError with message 'Invalid argument' There is no way to track that down without seeing a stack trace leading up to the exception being raised. > class ESocketConnectionError with message 'Error reading form socket' That exception is only raised when the socket API recv() function does not return as many bytes as were asked for during a reading operation. Which, frankly, is really stupid on TClientDataSet's part, because that is not the proper way to handle socket data. recv() is never guaranteed to return all of the requested bytes in one call. If the return value is > 0 and more bytes are expected, recv() is supposed to be called again. But TClientDataSet does not do that. > if ClientSocket don't open, this is no error > > How can I solve it??????? Don't open them at the same time, obviously. Without knowing more about why the EVariantInvalidArgError is being raised, all I can guess is that both components are trying to use the same port at the same one, and one of them is going to fail as a result. Gambit
Re: BUG for TClientSocket and TClientDataSet
Author: Emmanuel
Date: Fri, 30 Nov 2007 05:31
Date: Fri, 30 Nov 2007 05:31
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> > Don't open them at the same time, obviously. Without knowing more about > why > the EVariantInvalidArgError is being raised, all I can guess is that both > components are trying to use the same port at the same one, and one of > them > is going to fail as a result. My Program is that Firstly open the TClientDataSet by SocketServer(port 211) to machine A, there is no problem Secondly Open a TClientSocket connect to other machine B (Remote port is 9000) , there is also no problem, and then communicate to B,and get data from machine B, there is also no problem after that update or Get data by TClientDataSet from/to machine A, Error is occured I have also think may be the local port problem, but how can I set the local port for TClientDataSet,and SocketConnection? > > Gambit > >
Re: BUG for TClientSocket and TClientDataSet
Author: Remy Lebeau (TeamB)
Date: Fri, 30 Nov 2007 06:29
Date: Fri, 30 Nov 2007 06:29
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"Emmanuel" <emmanuel@erphk.com> wrote in message news:474f9ef5@newsgroups.borland.com... > after that update or Get data by TClientDataSet from/to > machine A, Error is occured Again, there is no way to diagnose that with the limited information you have provided so far. > I have also think may be the local port problem TClientDataSet uses a random local port, so there shouldn't be any conflict there. > how can I set the local port for TClientDataSet,and SocketConnection? You can't. They don't expose that functionality. Gambit
Re: BUG for TClientSocket and TClientDataSet
Author: Emmanuel
Date: Fri, 30 Nov 2007 09:28
Date: Fri, 30 Nov 2007 09:28
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you can make a simple program to test it, it must be error "Remy Lebeau (TeamB)" <no.spam@no.spam.com> д����Ϣ����:474fadb6$1@newsgroups.borland.com... > > "Emmanuel" <emmanuel@erphk.com> wrote in message > news:474f9ef5@newsgroups.borland.com... > >> after that update or Get data by TClientDataSet from/to >> machine A, Error is occured > > Again, there is no way to diagnose that with the limited information you > have provided so far. > >> I have also think may be the local port problem > > TClientDataSet uses a random local port, so there shouldn't be any > conflict > there. > >> how can I set the local port for TClientDataSet,and SocketConnection? > > You can't. They don't expose that functionality. > > > Gambit > >
Re: BUG for TClientSocket and TClientDataSet
Author: Emmanuel
Date: Tue, 11 Dec 2007 00:15
Date: Tue, 11 Dec 2007 00:15
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Too bad "Emmanuel" <emmanuel@erphk.com> д����Ϣ����:474fd757@newsgroups.borland.com... > you can make a simple program to test it, it must be error > > "Remy Lebeau (TeamB)" <no.spam@no.spam.com> д����Ϣ����:474fadb6$1@newsgroups.borland.com... >> >> "Emmanuel" <emmanuel@erphk.com> wrote in message >> news:474f9ef5@newsgroups.borland.com... >> >>> after that update or Get data by TClientDataSet from/to >>> machine A, Error is occured >> >> Again, there is no way to diagnose that with the limited information you >> have provided so far. >> >>> I have also think may be the local port problem >> >> TClientDataSet uses a random local port, so there shouldn't be any >> conflict >> there. >> >>> how can I set the local port for TClientDataSet,and SocketConnection? >> >> You can't. They don't expose that functionality. >> >> >> Gambit >> >> > >
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