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4.4

How to troubleshoot signal drop/ low signal?

Asked by gbzhhu in Handheld and PDA Programming, Microsoft Visual C#.Net, .Net Compact Framework

Hi,

I have a mobile app in C# .Net CF 2.0. The app calls a web service that writes/reads from/to SQL server database. We use two types of devices HTC TyTn 2 (on Orange) and XDA Stellar (on O2). Everything works fine but randomly as user tries to send an order they get back an error

"An error message cannot be displayed because an optional resource assembly containing it cannot be found"

This error is related to missing System_SR.cab but in this case it isn't. All other errors display ok. I think the network connection drops but not sure

I can tell the error is not coming from the web service method we call. It is happening before it is invoked

I write the exception to the database so the extra information I have about it is

==============
Outer Exception
=============
Type: System.Net.WebException

StackTrace:
at System.Net.HttpWebRequest.finishGetResponse()
at System.Net.HttpWebRequest.GetResponse()
at System.Web.Services.Protocols.WebClientProtocol.GetWebResponse()
at System.Web.Services.Protocols.HttpWebClientProtocol.GetWebResponse()
at System.Web.Services.Protocols.SoapHttpClientProtocol.doInvoke()
at MobileCentaur.MyCentaurSvc.CentaurSvc.MobileSvc.SendOrder()
at MobileCentaur.OrderDispatch.btnOrder_Click()

==============
Inner Exception
=============
Type: System.Net.Sockets.SocketException

StackTrace:
at System.Net.HttpWebRequest.fillBuffer()
at System.Net.HttpWebRequest.getLine()
at System.Net.HttpWebRequest.parseResponse()
at System.Net.HttpWebRequest.startReceiving()
at System.Net.Connection.startReceiving()
at WorkItem.doWork()
at System.Threading.Timer.ring()

This error occurrs for random users at random times. First they get low signal then this error. I am just lost as to how to debug/resolve this. Is it something I can do by code or does the network provider need to do something?

Changed MTU settings as in http://social.msdn.microsoft.com/forums/en-US/netfxcompact/thread/b0f90f2c-cb07-455d-a740-f34bb66a3912/

It doesn't help.

I need ideas on resolving this thing.

Thanks
H

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How to troubleshoot signal drop/ low signal?

Asked by gbzhhu in Handheld and PDA Programming, Microsoft Visual C#.Net, .Net Compact Framework

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