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dotnet compact framework : TcpClient Problem
That's probably not a feature of what sort of an adapter is used, but whether it's actually connected to the right access point/wireless network. You should compare the wireless configurations on the two devices... Paul T. [quoted text, click to view] "Andy Baker" <abaker@NOSPAMvanputer.com> wrote in message news:13fn9a8lt4cr925@corp.supernews.com... >I have a VB.NET 2003 application that has been running successfully on a >device running CE.NET 4.2. I have recently been supplied with the latest >version of the device, which runs CE.NET 5, and also has a different WiFi >adapter to my original version. The application connects to a desktop PC >using a TcpClient as follows:- > > Private client as TcpClient > client = New TcpClient(IPAddress, PORT_NUM) > > where IPAddress is 192.169.1.10 (the address of the host PC) and PORT_NUM > is a constant - the number of the port I want to use for the connection > (10000 in this case). The application on the host PC has a listener object > waiting for a connection on the same port number. On the CE 4.2 device it > works fine, on the new one I get the error message 'No such host is known' > after a few seconds (on the New TcpClient line above). Is this likely to > be a CE problem or a WiFi adapter problem (or something else), and what > can I do about it? Thanks in advance. > > Andy Baker >
In addition to Paul's comments. Have you tried using the Socket class?
TcpClient can be problematic at times and is not really designed for enterprise apps. I would stay away from TcpClient. -- Simon Hart http://simonrhart.blogspot.com [quoted text, click to view] "Andy Baker" wrote:
> I have a VB.NET 2003 application that has been running successfully on a > device running CE.NET 4.2. I have recently been supplied with the latest > version of the device, which runs CE.NET 5, and also has a different WiFi > adapter to my original version. The application connects to a desktop PC > using a TcpClient as follows:- > > Private client as TcpClient > client = New TcpClient(IPAddress, PORT_NUM) > > where IPAddress is 192.169.1.10 (the address of the host PC) and PORT_NUM is > a constant - the number of the port I want to use for the connection (10000 > in this case). The application on the host PC has a listener object waiting > for a connection on the same port number. On the CE 4.2 device it works > fine, on the new one I get the error message 'No such host is known' after a > few seconds (on the New TcpClient line above). Is this likely to be a CE > problem or a WiFi adapter problem (or something else), and what can I do > about it? Thanks in advance. > > Andy Baker > >
I have a VB.NET 2003 application that has been running successfully on a
device running CE.NET 4.2. I have recently been supplied with the latest version of the device, which runs CE.NET 5, and also has a different WiFi adapter to my original version. The application connects to a desktop PC using a TcpClient as follows:- Private client as TcpClient client = New TcpClient(IPAddress, PORT_NUM) where IPAddress is 192.169.1.10 (the address of the host PC) and PORT_NUM is a constant - the number of the port I want to use for the connection (10000 in this case). The application on the host PC has a listener object waiting for a connection on the same port number. On the CE 4.2 device it works fine, on the new one I get the error message 'No such host is known' after a few seconds (on the New TcpClient line above). Is this likely to be a CE problem or a WiFi adapter problem (or something else), and what can I do about it? Thanks in advance. Andy Baker
It seems to be more complicated than that. I should have said that I can
ping the host PC from the device successfully using the same IP address as I am using in the TcpClient I have checked the wireless configuration settings and they seem to be identical. Under the 'Wireless Information' tab it reports it as being connected and IP information / subnet mask is correct. Are there any more settings that I am not aware of? Andy Baker "Paul G. Tobey [eMVP]" <p space tobey no spam AT no instrument no spam DOT [quoted text, click to view] com> wrote in message news:eT89yKSAIHA.968@TK2MSFTNGP03.phx.gbl... > It sounds like there is no network path from you, on the device, to the > PC. That's probably not a feature of what sort of an adapter is used, but > whether it's actually connected to the right access point/wireless > network. You should compare the wireless configurations on the two > devices... > > Paul T. > > "Andy Baker" <abaker@NOSPAMvanputer.com> wrote in message > news:13fn9a8lt4cr925@corp.supernews.com... >>I have a VB.NET 2003 application that has been running successfully on a >>device running CE.NET 4.2. I have recently been supplied with the latest >>version of the device, which runs CE.NET 5, and also has a different WiFi >>adapter to my original version. The application connects to a desktop PC >>using a TcpClient as follows:- >> >> Private client as TcpClient >> client = New TcpClient(IPAddress, PORT_NUM) >> >> where IPAddress is 192.169.1.10 (the address of the host PC) and PORT_NUM >> is a constant - the number of the port I want to use for the connection >> (10000 in this case). The application on the host PC has a listener >> object waiting for a connection on the same port number. On the CE 4.2 >> device it works fine, on the new one I get the error message 'No such >> host is known' after a few seconds (on the New TcpClient line above). Is >> this likely to be a CE problem or a WiFi adapter problem (or something >> else), and what can I do about it? Thanks in advance. >> >> Andy Baker >> > >
I will look at that in the future. Unfortunately time is pressing at the
moment and it worked before so I would prefer not to have to change at present. Thanks for the suggestion. Andy Baker [quoted text, click to view] "Simon Hart" <srhartone@yahoo.com> wrote in message news:F1157D48-9D67-4D64-AF91-3205606536A3@microsoft.com... > In addition to Paul's comments. Have you tried using the Socket class? > TcpClient can be problematic at times and is not really designed for > enterprise apps. I would stay away from TcpClient. > -- > Simon Hart > http://simonrhart.blogspot.com > > > "Andy Baker" wrote: > >> I have a VB.NET 2003 application that has been running successfully on a >> device running CE.NET 4.2. I have recently been supplied with the latest >> version of the device, which runs CE.NET 5, and also has a different WiFi >> adapter to my original version. The application connects to a desktop PC >> using a TcpClient as follows:- >> >> Private client as TcpClient >> client = New TcpClient(IPAddress, PORT_NUM) >> >> where IPAddress is 192.169.1.10 (the address of the host PC) and PORT_NUM >> is >> a constant - the number of the port I want to use for the connection >> (10000 >> in this case). The application on the host PC has a listener object >> waiting >> for a connection on the same port number. On the CE 4.2 device it works >> fine, on the new one I get the error message 'No such host is known' >> after a >> few seconds (on the New TcpClient line above). Is this likely to be a CE >> problem or a WiFi adapter problem (or something else), and what can I do >> about it? Thanks in advance. >> >> Andy Baker >> >> >>
No. Connectivity is all you need. Maybe you specified the wrong port
number or something. As Simon said, try plain sockets, if that doesn't seem to be the problem... Paul T. [quoted text, click to view] "Andy Baker" <abaker@NOSPAMvanputer.com> wrote in message news:13fpe5sjrsuab40@corp.supernews.com... > It seems to be more complicated than that. I should have said that I can > ping the host PC from the device successfully using the same IP address as > I am using in the TcpClient I have checked the wireless configuration > settings and they seem to be identical. Under the 'Wireless Information' > tab it reports it as being connected and IP information / subnet mask is > correct. Are there any more settings that I am not aware of? > > Andy Baker > > "Paul G. Tobey [eMVP]" <p space tobey no spam AT no instrument no spam DOT > com> wrote in message news:eT89yKSAIHA.968@TK2MSFTNGP03.phx.gbl... >> It sounds like there is no network path from you, on the device, to the >> PC. That's probably not a feature of what sort of an adapter is used, but >> whether it's actually connected to the right access point/wireless >> network. You should compare the wireless configurations on the two >> devices... >> >> Paul T. >> >> "Andy Baker" <abaker@NOSPAMvanputer.com> wrote in message >> news:13fn9a8lt4cr925@corp.supernews.com... >>>I have a VB.NET 2003 application that has been running successfully on a >>>device running CE.NET 4.2. I have recently been supplied with the latest >>>version of the device, which runs CE.NET 5, and also has a different WiFi >>>adapter to my original version. The application connects to a desktop PC >>>using a TcpClient as follows:- >>> >>> Private client as TcpClient >>> client = New TcpClient(IPAddress, PORT_NUM) >>> >>> where IPAddress is 192.169.1.10 (the address of the host PC) and >>> PORT_NUM is a constant - the number of the port I want to use for the >>> connection (10000 in this case). The application on the host PC has a >>> listener object waiting for a connection on the same port number. On the >>> CE 4.2 device it works fine, on the new one I get the error message 'No >>> such host is known' after a few seconds (on the New TcpClient line >>> above). Is this likely to be a CE problem or a WiFi adapter problem (or >>> something else), and what can I do about it? Thanks in advance. >>> >>> Andy Baker >>> >> >> > >
When you pass a string, that's interpreted as a host name, *NOT* an IP
address. Paul T. [quoted text, click to view] "Andy Baker" <abaker@NOSPAMvanputer.com> wrote in message news:13h6vil22tnev53@corp.supernews.com... >I have got it working. I have changed the code to create the TcpClient >first, then connect using an IPAddress rather than a string i.e. > Dim ParsedIPAddress as IPAddress > ParsedIPAddress = IPAddress.Parse("192.168.1.10") > client = New TcpClient > client.Connect(ParsedIPAddress, PORT_NUM) > and it works as it did before on the previous WiFi card/CE combination. I > don't know why it should work with one and not the other, but at least it > gets me out of trouble. Thanks for your help. > > "Paul G. Tobey [eMVP]" <p space tobey no spam AT no instrument no spam DOT > com> wrote in message news:O03dFFeAIHA.1204@TK2MSFTNGP03.phx.gbl... >> No. Connectivity is all you need. Maybe you specified the wrong port >> number or something. As Simon said, try plain sockets, if that doesn't >> seem to be the problem... >> >> Paul T. >> >> "Andy Baker" <abaker@NOSPAMvanputer.com> wrote in message >> news:13fpe5sjrsuab40@corp.supernews.com... >>> It seems to be more complicated than that. I should have said that I can >>> ping the host PC from the device successfully using the same IP address >>> as I am using in the TcpClient I have checked the wireless configuration >>> settings and they seem to be identical. Under the 'Wireless Information' >>> tab it reports it as being connected and IP information / subnet mask is >>> correct. Are there any more settings that I am not aware of? >>> >>> Andy Baker >>> >>> "Paul G. Tobey [eMVP]" <p space tobey no spam AT no instrument no spam >>> DOT com> wrote in message news:eT89yKSAIHA.968@TK2MSFTNGP03.phx.gbl... >>>> It sounds like there is no network path from you, on the device, to the >>>> PC. That's probably not a feature of what sort of an adapter is used, >>>> but whether it's actually connected to the right access point/wireless >>>> network. You should compare the wireless configurations on the two >>>> devices... >>>> >>>> Paul T. >>>> >>>> "Andy Baker" <abaker@NOSPAMvanputer.com> wrote in message >>>> news:13fn9a8lt4cr925@corp.supernews.com... >>>>>I have a VB.NET 2003 application that has been running successfully on >>>>>a device running CE.NET 4.2. I have recently been supplied with the >>>>>latest version of the device, which runs CE.NET 5, and also has a >>>>>different WiFi adapter to my original version. The application connects >>>>>to a desktop PC using a TcpClient as follows:- >>>>> >>>>> Private client as TcpClient >>>>> client = New TcpClient(IPAddress, PORT_NUM) >>>>> >>>>> where IPAddress is 192.169.1.10 (the address of the host PC) and >>>>> PORT_NUM is a constant - the number of the port I want to use for the >>>>> connection (10000 in this case). The application on the host PC has a >>>>> listener object waiting for a connection on the same port number. On >>>>> the CE 4.2 device it works fine, on the new one I get the error >>>>> message 'No such host is known' after a few seconds (on the New >>>>> TcpClient line above). Is this likely to be a CE problem or a WiFi >>>>> adapter problem (or something else), and what can I do about it? >>>>> Thanks in advance. >>>>> >>>>> Andy Baker >>>>> >>>> >>>> >>> >>> >> >> > >
I've never been able to get any of my devices to interpret a string
parameter as a host name. It's possible, I guess, that some setting, a hosts 'file' setting or something (something that I wouldn't have), allows that entry to be interpreted that way. I think it would have to be something that was essentially disconnected from your actual code. In any case, take care with that parameter... Paul T. [quoted text, click to view] "Andy Baker" <abaker@NOSPAMvanputer.com> wrote in message news:13h72n77jrhkh65@corp.supernews.com... > OK, but why did the other device work - it obviously managed to interpret > the string as an IP address! > > Andy > > "Paul G. Tobey [eMVP]" <p space tobey no spam AT no instrument no spam DOT > com> wrote in message news:uh$6A1zDIHA.4228@TK2MSFTNGP02.phx.gbl... >> When you pass a string, that's interpreted as a host name, *NOT* an IP >> address. >> >> Paul T. >> >> "Andy Baker" <abaker@NOSPAMvanputer.com> wrote in message >> news:13h6vil22tnev53@corp.supernews.com... >>>I have got it working. I have changed the code to create the TcpClient >>>first, then connect using an IPAddress rather than a string i.e. >>> Dim ParsedIPAddress as IPAddress >>> ParsedIPAddress = IPAddress.Parse("192.168.1.10") >>> client = New TcpClient >>> client.Connect(ParsedIPAddress, PORT_NUM) >>> and it works as it did before on the previous WiFi card/CE combination. >>> I don't know why it should work with one and not the other, but at least >>> it gets me out of trouble. Thanks for your help. >>> >>> "Paul G. Tobey [eMVP]" <p space tobey no spam AT no instrument no spam >>> DOT com> wrote in message news:O03dFFeAIHA.1204@TK2MSFTNGP03.phx.gbl... >>>> No. Connectivity is all you need. Maybe you specified the wrong port >>>> number or something. As Simon said, try plain sockets, if that doesn't >>>> seem to be the problem... >>>> >>>> Paul T. >>>> >>>> "Andy Baker" <abaker@NOSPAMvanputer.com> wrote in message >>>> news:13fpe5sjrsuab40@corp.supernews.com... >>>>> It seems to be more complicated than that. I should have said that I >>>>> can ping the host PC from the device successfully using the same IP >>>>> address as I am using in the TcpClient I have checked the wireless >>>>> configuration settings and they seem to be identical. Under the >>>>> 'Wireless Information' tab it reports it as being connected and IP >>>>> information / subnet mask is correct. Are there any more settings that >>>>> I am not aware of? >>>>> >>>>> Andy Baker >>>>> >>>>> "Paul G. Tobey [eMVP]" <p space tobey no spam AT no instrument no spam >>>>> DOT com> wrote in message news:eT89yKSAIHA.968@TK2MSFTNGP03.phx.gbl... >>>>>> It sounds like there is no network path from you, on the device, to >>>>>> the PC. That's probably not a feature of what sort of an adapter is >>>>>> used, but whether it's actually connected to the right access >>>>>> point/wireless network. You should compare the wireless >>>>>> configurations on the two devices... >>>>>> >>>>>> Paul T. >>>>>> >>>>>> "Andy Baker" <abaker@NOSPAMvanputer.com> wrote in message >>>>>> news:13fn9a8lt4cr925@corp.supernews.com... >>>>>>>I have a VB.NET 2003 application that has been running successfully >>>>>>>on a device running CE.NET 4.2. I have recently been supplied with >>>>>>>the latest version of the device, which runs CE.NET 5, and also has a >>>>>>>different WiFi adapter to my original version. The application >>>>>>>connects to a desktop PC using a TcpClient as follows:- >>>>>>> >>>>>>> Private client as TcpClient >>>>>>> client = New TcpClient(IPAddress, PORT_NUM) >>>>>>> >>>>>>> where IPAddress is 192.169.1.10 (the address of the host PC) and >>>>>>> PORT_NUM is a constant - the number of the port I want to use for >>>>>>> the connection (10000 in this case). The application on the host PC >>>>>>> has a listener object waiting for a connection on the same port >>>>>>> number. On the CE 4.2 device it works fine, on the new one I get the >>>>>>> error message 'No such host is known' after a few seconds (on the >>>>>>> New TcpClient line above). Is this likely to be a CE problem or a >>>>>>> WiFi adapter problem (or something else), and what can I do about >>>>>>> it? Thanks in advance. >>>>>>> >>>>>>> Andy Baker >>>>>>> >>>>>> >>>>>> >>>>> >>>>> >>>> >>>> >>> >>> >> >> > >
Let me try that again. I've not been able to get them to interpret a string
as an *IP address*... Paul T. "Paul G. Tobey [eMVP]" <p space tobey no spam AT no instrument no spam DOT [quoted text, click to view] com> wrote in message news:uFRzXQ0DIHA.5160@TK2MSFTNGP05.phx.gbl... > I've never been able to get any of my devices to interpret a string > parameter as a host name. It's possible, I guess, that some setting, a > hosts 'file' setting or something (something that I wouldn't have), allows > that entry to be interpreted that way. I think it would have to be > something that was essentially disconnected from your actual code. In any > case, take care with that parameter... > > Paul T. > > "Andy Baker" <abaker@NOSPAMvanputer.com> wrote in message > news:13h72n77jrhkh65@corp.supernews.com... >> OK, but why did the other device work - it obviously managed to interpret >> the string as an IP address! >> >> Andy >> >> "Paul G. Tobey [eMVP]" <p space tobey no spam AT no instrument no spam >> DOT com> wrote in message news:uh$6A1zDIHA.4228@TK2MSFTNGP02.phx.gbl... >>> When you pass a string, that's interpreted as a host name, *NOT* an IP >>> address. >>> >>> Paul T. >>> >>> "Andy Baker" <abaker@NOSPAMvanputer.com> wrote in message >>> news:13h6vil22tnev53@corp.supernews.com... >>>>I have got it working. I have changed the code to create the TcpClient >>>>first, then connect using an IPAddress rather than a string i.e. >>>> Dim ParsedIPAddress as IPAddress >>>> ParsedIPAddress = IPAddress.Parse("192.168.1.10") >>>> client = New TcpClient >>>> client.Connect(ParsedIPAddress, PORT_NUM) >>>> and it works as it did before on the previous WiFi card/CE combination. >>>> I don't know why it should work with one and not the other, but at >>>> least it gets me out of trouble. Thanks for your help. >>>> >>>> "Paul G. Tobey [eMVP]" <p space tobey no spam AT no instrument no spam >>>> DOT com> wrote in message news:O03dFFeAIHA.1204@TK2MSFTNGP03.phx.gbl... >>>>> No. Connectivity is all you need. Maybe you specified the wrong port >>>>> number or something. As Simon said, try plain sockets, if that >>>>> doesn't seem to be the problem... >>>>> >>>>> Paul T. >>>>> >>>>> "Andy Baker" <abaker@NOSPAMvanputer.com> wrote in message >>>>> news:13fpe5sjrsuab40@corp.supernews.com... >>>>>> It seems to be more complicated than that. I should have said that I >>>>>> can ping the host PC from the device successfully using the same IP >>>>>> address as I am using in the TcpClient I have checked the wireless >>>>>> configuration settings and they seem to be identical. Under the >>>>>> 'Wireless Information' tab it reports it as being connected and IP >>>>>> information / subnet mask is correct. Are there any more settings >>>>>> that I am not aware of? >>>>>> >>>>>> Andy Baker >>>>>> >>>>>> "Paul G. Tobey [eMVP]" <p space tobey no spam AT no instrument no >>>>>> spam DOT com> wrote in message >>>>>> news:eT89yKSAIHA.968@TK2MSFTNGP03.phx.gbl... >>>>>>> It sounds like there is no network path from you, on the device, to >>>>>>> the PC. That's probably not a feature of what sort of an adapter is >>>>>>> used, but whether it's actually connected to the right access >>>>>>> point/wireless network. You should compare the wireless >>>>>>> configurations on the two devices... >>>>>>> >>>>>>> Paul T. >>>>>>> >>>>>>> "Andy Baker" <abaker@NOSPAMvanputer.com> wrote in message >>>>>>> news:13fn9a8lt4cr925@corp.supernews.com... >>>>>>>>I have a VB.NET 2003 application that has been running successfully >>>>>>>>on a device running CE.NET 4.2. I have recently been supplied with >>>>>>>>the latest version of the device, which runs CE.NET 5, and also has >>>>>>>>a different WiFi adapter to my original version. The application >>>>>>>>connects to a desktop PC using a TcpClient as follows:- >>>>>>>> >>>>>>>> Private client as TcpClient >>>>>>>> client = New TcpClient(IPAddress, PORT_NUM) >>>>>>>> >>>>>>>> where IPAddress is 192.169.1.10 (the address of the host PC) and >>>>>>>> PORT_NUM is a constant - the number of the port I want to use for >>>>>>>> the connection (10000 in this case). The application on the host PC >>>>>>>> has a listener object waiting for a connection on the same port >>>>>>>> number. On the CE 4.2 device it works fine, on the new one I get >>>>>>>> the error message 'No such host is known' after a few seconds (on >>>>>>>> the New TcpClient line above). Is this likely to be a CE problem or >>>>>>>> a WiFi adapter problem (or something else), and what can I do about >>>>>>>> it? Thanks in advance. >>>>>>>> >>>>>>>> Andy Baker >>>>>>>> >>>>>>> >>>>>>> >>>>>> >>>>>> >>>>> >>>>> >>>> >>>> >>> >>> >> >> > >
I have got it working. I have changed the code to create the TcpClient
first, then connect using an IPAddress rather than a string i.e. Dim ParsedIPAddress as IPAddress ParsedIPAddress = IPAddress.Parse("192.168.1.10") client = New TcpClient client.Connect(ParsedIPAddress, PORT_NUM) and it works as it did before on the previous WiFi card/CE combination. I don't know why it should work with one and not the other, but at least it gets me out of trouble. Thanks for your help. "Paul G. Tobey [eMVP]" <p space tobey no spam AT no instrument no spam DOT [quoted text, click to view] com> wrote in message news:O03dFFeAIHA.1204@TK2MSFTNGP03.phx.gbl... > No. Connectivity is all you need. Maybe you specified the wrong port > number or something. As Simon said, try plain sockets, if that doesn't > seem to be the problem... > > Paul T. > > "Andy Baker" <abaker@NOSPAMvanputer.com> wrote in message > news:13fpe5sjrsuab40@corp.supernews.com... >> It seems to be more complicated than that. I should have said that I can >> ping the host PC from the device successfully using the same IP address >> as I am using in the TcpClient I have checked the wireless configuration >> settings and they seem to be identical. Under the 'Wireless Information' >> tab it reports it as being connected and IP information / subnet mask is >> correct. Are there any more settings that I am not aware of? >> >> Andy Baker >> >> "Paul G. Tobey [eMVP]" <p space tobey no spam AT no instrument no spam >> DOT com> wrote in message news:eT89yKSAIHA.968@TK2MSFTNGP03.phx.gbl... >>> It sounds like there is no network path from you, on the device, to the >>> PC. That's probably not a feature of what sort of an adapter is used, >>> but whether it's actually connected to the right access point/wireless >>> network. You should compare the wireless configurations on the two >>> devices... >>> >>> Paul T. >>> >>> "Andy Baker" <abaker@NOSPAMvanputer.com> wrote in message >>> news:13fn9a8lt4cr925@corp.supernews.com... >>>>I have a VB.NET 2003 application that has been running successfully on a >>>>device running CE.NET 4.2. I have recently been supplied with the latest >>>>version of the device, which runs CE.NET 5, and also has a different >>>>WiFi adapter to my original version. The application connects to a >>>>desktop PC using a TcpClient as follows:- >>>> >>>> Private client as TcpClient >>>> client = New TcpClient(IPAddress, PORT_NUM) >>>> >>>> where IPAddress is 192.169.1.10 (the address of the host PC) and >>>> PORT_NUM is a constant - the number of the port I want to use for the >>>> connection (10000 in this case). The application on the host PC has a >>>> listener object waiting for a connection on the same port number. On >>>> the CE 4.2 device it works fine, on the new one I get the error message >>>> 'No such host is known' after a few seconds (on the New TcpClient line >>>> above). Is this likely to be a CE problem or a WiFi adapter problem (or >>>> something else), and what can I do about it? Thanks in advance. >>>> >>>> Andy Baker >>>> >>> >>> >> >> > >
OK, but why did the other device work - it obviously managed to interpret
the string as an IP address! Andy "Paul G. Tobey [eMVP]" <p space tobey no spam AT no instrument no spam DOT [quoted text, click to view] com> wrote in message news:uh$6A1zDIHA.4228@TK2MSFTNGP02.phx.gbl... > When you pass a string, that's interpreted as a host name, *NOT* an IP > address. > > Paul T. > > "Andy Baker" <abaker@NOSPAMvanputer.com> wrote in message > news:13h6vil22tnev53@corp.supernews.com... >>I have got it working. I have changed the code to create the TcpClient >>first, then connect using an IPAddress rather than a string i.e. >> Dim ParsedIPAddress as IPAddress >> ParsedIPAddress = IPAddress.Parse("192.168.1.10") >> client = New TcpClient >> client.Connect(ParsedIPAddress, PORT_NUM) >> and it works as it did before on the previous WiFi card/CE combination. I >> don't know why it should work with one and not the other, but at least it >> gets me out of trouble. Thanks for your help. >> >> "Paul G. Tobey [eMVP]" <p space tobey no spam AT no instrument no spam >> DOT com> wrote in message news:O03dFFeAIHA.1204@TK2MSFTNGP03.phx.gbl... >>> No. Connectivity is all you need. Maybe you specified the wrong port >>> number or something. As Simon said, try plain sockets, if that doesn't >>> seem to be the problem... >>> >>> Paul T. >>> >>> "Andy Baker" <abaker@NOSPAMvanputer.com> wrote in message >>> news:13fpe5sjrsuab40@corp.supernews.com... >>>> It seems to be more complicated than that. I should have said that I >>>> can ping the host PC from the device successfully using the same IP >>>> address as I am using in the TcpClient I have checked the wireless >>>> configuration settings and they seem to be identical. Under the >>>> 'Wireless Information' tab it reports it as being connected and IP >>>> information / subnet mask is correct. Are there any more settings that >>>> I am not aware of? >>>> >>>> Andy Baker >>>> >>>> "Paul G. Tobey [eMVP]" <p space tobey no spam AT no instrument no spam >>>> DOT com> wrote in message news:eT89yKSAIHA.968@TK2MSFTNGP03.phx.gbl... >>>>> It sounds like there is no network path from you, on the device, to >>>>> the PC. That's probably not a feature of what sort of an adapter is >>>>> used, but whether it's actually connected to the right access >>>>> point/wireless network. You should compare the wireless configurations >>>>> on the two devices... >>>>> >>>>> Paul T. >>>>> >>>>> "Andy Baker" <abaker@NOSPAMvanputer.com> wrote in message >>>>> news:13fn9a8lt4cr925@corp.supernews.com... >>>>>>I have a VB.NET 2003 application that has been running successfully on >>>>>>a device running CE.NET 4.2. I have recently been supplied with the >>>>>>latest version of the device, which runs CE.NET 5, and also has a >>>>>>different WiFi adapter to my original version. The application >>>>>>connects to a desktop PC using a TcpClient as follows:- >>>>>> >>>>>> Private client as TcpClient >>>>>> client = New TcpClient(IPAddress, PORT_NUM) >>>>>> >>>>>> where IPAddress is 192.169.1.10 (the address of the host PC) and >>>>>> PORT_NUM is a constant - the number of the port I want to use for the >>>>>> connection (10000 in this case). The application on the host PC has a >>>>>> listener object waiting for a connection on the same port number. On >>>>>> the CE 4.2 device it works fine, on the new one I get the error >>>>>> message 'No such host is known' after a few seconds (on the New >>>>>> TcpClient line above). Is this likely to be a CE problem or a WiFi >>>>>> adapter problem (or something else), and what can I do about it? >>>>>> Thanks in advance. >>>>>> >>>>>> Andy Baker >>>>>> >>>>> >>>>> >>>> >>>> >>> >>> >> >> > >
I'll remember that in future. The problem was that I didn't write the code,
and didn't really look into how it worked. It always worked on the previous device, and when we got a new device with a different radio card and different version of CE.NET, I assumed that it had to be one or the other that was causing the problem. It seems like the question now is why did it work on the previous device, but I won't worry about that too much! Andy Baker "Paul G. Tobey [eMVP]" <p space tobey no spam AT no instrument no spam DOT [quoted text, click to view] com> wrote in message news:uFRzXQ0DIHA.5160@TK2MSFTNGP05.phx.gbl... > I've never been able to get any of my devices to interpret a string > parameter as a host name. It's possible, I guess, that some setting, a > hosts 'file' setting or something (something that I wouldn't have), allows > that entry to be interpreted that way. I think it would have to be > something that was essentially disconnected from your actual code. In any > case, take care with that parameter... > > Paul T. > > "Andy Baker" <abaker@NOSPAMvanputer.com> wrote in message > news:13h72n77jrhkh65@corp.supernews.com... >> OK, but why did the other device work - it obviously managed to interpret >> the string as an IP address! >> >> Andy >> >> "Paul G. Tobey [eMVP]" <p space tobey no spam AT no instrument no spam >> DOT com> wrote in message news:uh$6A1zDIHA.4228@TK2MSFTNGP02.phx.gbl... >>> When you pass a string, that's interpreted as a host name, *NOT* an IP >>> address. >>> >>> Paul T. >>> >>> "Andy Baker" <abaker@NOSPAMvanputer.com> wrote in message >>> news:13h6vil22tnev53@corp.supernews.com... >>>>I have got it working. I have changed the code to create the TcpClient >>>>first, then connect using an IPAddress rather than a string i.e. >>>> Dim ParsedIPAddress as IPAddress >>>> ParsedIPAddress = IPAddress.Parse("192.168.1.10") >>>> client = New TcpClient >>>> client.Connect(ParsedIPAddress, PORT_NUM) >>>> and it works as it did before on the previous WiFi card/CE combination. >>>> I don't know why it should work with one and not the other, but at >>>> least it gets me out of trouble. Thanks for your help. >>>> >>>> "Paul G. Tobey [eMVP]" <p space tobey no spam AT no instrument no spam >>>> DOT com> wrote in message news:O03dFFeAIHA.1204@TK2MSFTNGP03.phx.gbl... >>>>> No. Connectivity is all you need. Maybe you specified the wrong port >>>>> number or something. As Simon said, try plain sockets, if that >>>>> doesn't seem to be the problem... >>>>> >>>>> Paul T. >>>>> >>>>> "Andy Baker" <abaker@NOSPAMvanputer.com> wrote in message >>>>> news:13fpe5sjrsuab40@corp.supernews.com... >>>>>> It seems to be more complicated than that. I should have said that I >>>>>> can ping the host PC from the device successfully using the same IP >>>>>> address as I am using in the TcpClient I have checked the wireless >>>>>> configuration settings and they seem to be identical. Under the >>>>>> 'Wireless Information' tab it reports it as being connected and IP >>>>>> information / subnet mask is correct. Are there any more settings >>>>>> that I am not aware of? >>>>>> >>>>>> Andy Baker >>>>>> >>>>>> "Paul G. Tobey [eMVP]" <p space tobey no spam AT no instrument no >>>>>> spam DOT com> wrote in message >>>>>> news:eT89yKSAIHA.968@TK2MSFTNGP03.phx.gbl... >>>>>>> It sounds like there is no network path from you, on the device, to >>>>>>> the PC. That's probably not a feature of what sort of an adapter is >>>>>>> used, but whether it's actually connected to the right access >>>>>>> point/wireless network. You should compare the wireless >>>>>>> configurations on the two devices... >>>>>>> >>>>>>> Paul T. >>>>>>> >>>>>>> "Andy Baker" <abaker@NOSPAMvanputer.com> wrote in message >>>>>>> news:13fn9a8lt4cr925@corp.supernews.com... >>>>>>>>I have a VB.NET 2003 application that has been running successfully >>>>>>>>on a device running CE.NET 4.2. I have recently been supplied with >>>>>>>>the latest version of the device, which runs CE.NET 5, and also has >>>>>>>>a different WiFi adapter to my original version. The application >>>>>>>>connects to a desktop PC using a TcpClient as follows:- >>>>>>>> >>>>>>>> Private client as TcpClient >>>>>>>> client = New TcpClient(IPAddress, PORT_NUM) >>>>>>>> >>>>>>>> where IPAddress is 192.169.1.10 (the address of the host PC) and >>>>>>>> PORT_NUM is a constant - the number of the port I want to use for >>>>>>>> the connection (10000 in this case). The application on the host PC >>>>>>>> has a listener object waiting for a connection on the same port >>>>>>>> number. On the CE 4.2 device it works fine, on the new one I get >>>>>>>> the error message 'No such host is known' after a few seconds (on >>>>>>>> the New TcpClient line above). Is this likely to be a CE problem or >>>>>>>> a WiFi adapter problem (or something else), and what can I do about >>>>>>>> it? Thanks in advance. >>>>>>>> >>>>>>>> Andy Baker >>>>>>>> >>>>>>> >>>>>>> >>>>>> >>>>>> >>>>> >>>>> >>>> >>>> >>> >>> >> >> > >
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