How to catch exeption EndpointNotFoundExeption was unhandled when i disconnect the internet? (using Bing Search API )

Question

My simple code:

SearchRequest req = new SearchRequest();

req.AppId = "My Bing API Key";
req.Query = "msdn ";
req.Sources = new SourceType[] { SourceType.Web };

BingPortTypeClient service = new BingPortTypeClient();
                
service.SearchCompleted += new EventHandler<SearchCompletedEventArgs>(service_SearchCompleted);
                service.SearchAsync(req);

If i connect the internet then not problem, but when i disconnect the internet, i get exeption:

System.ServiceModel.EndpointNotFoundException was unhandled

  Message=There was no endpoint listening at http://api.bing.net/soap.asmx that could accept the message. This is often caused by an incorrect address or SOAP action. See InnerException, if present, for more details.

  StackTrace:

       at System.ServiceModel.Channels.HttpChannelUtilities.ProcessGetResponseWebException(WebException webException, HttpWebRequest request, HttpAbortReason abortReason)

       at System.ServiceModel.Channels.HttpChannelFactory.HttpRequestChannel.HttpChannelAsyncRequest.CompleteGetResponse(IAsyncResult result)

       at System.ServiceModel.Channels.HttpChannelFactory.HttpRequestChannel.HttpChannelAsyncRequest.OnGetResponse(IAsyncResult result)

       at System.Net.Browser.ClientHttpWebRequest.<>c__DisplayClassa.<InvokeGetResponseCallback>b__8(Object state2)

       at System.Threading.ThreadPool.WorkItem.doWork(Object o)

       at System.Threading.Timer.ring()

  InnerException: System.Net.WebException

       Message=The remote server returned an error: NotFound.

       StackTrace:

            at System.Net.Browser.AsyncHelper.BeginOnUI(SendOrPostCallback beginMethod, Object state)

            at System.Net.Browser.ClientHttpWebRequest.EndGetResponse(IAsyncResult asyncResult)

            at System.ServiceModel.Channels.HttpChannelFactory.HttpRequestChannel.HttpChannelAsyncRequest.CompleteGetResponse(IAsyncResult result)

            at System.ServiceModel.Channels.HttpChannelFactory.HttpRequestChannel.HttpChannelAsyncRequest.OnGetResponse(IAsyncResult result)

            at System.Net.Browser.ClientHttpWebRequest.<>c__DisplayClassa.<InvokeGetResponseCallback>b__8(Object state2)

            at System.Threading.ThreadPool.WorkItem.doWork(Object o)

            at System.Threading.Timer.ring()

       InnerException: System.Net.WebException

            Message=The remote server returned an error: NotFound.

            StackTrace:

                 at System.Net.Browser.ClientHttpWebRequest.InternalEndGetResponse(IAsyncResult asyncResult)

                 at System.Net.Browser.ClientHttpWebRequest.<>c__DisplayClass2.<EndGetResponse>b__1(Object sendState)

                 at System.Net.Browser.AsyncHelper.<>c__DisplayClass4.<BeginOnUI>b__0(Object sendState)

                 at System.Reflection.RuntimeMethodInfo.InternalInvoke(RuntimeMethodInfo rtmi, Object obj, BindingFlags invokeAttr, Binder binder, Object parameters, CultureInfo culture, Boolean isBinderDefault, Assembly caller, Boolean verifyAccess, StackCrawlMark& stackMark)

                 at System.Reflection.RuntimeMethodInfo.InternalInvoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture, StackCrawlMark& stackMark)

                 at System.Reflection.MethodBase.Invoke(Object obj, Object[] parameters)

                 at System.Delegate.DynamicInvokeOne(Object[] args)

                 at System.MulticastDelegate.DynamicInvokeImpl(Object[] args)

                 at System.Delegate.DynamicInvoke(Object[] args)

                 at System.Windows.Threading.Dispatcher.<>c__DisplayClass4.<FastInvoke>b__3()

                 at System.Reflection.RuntimeMethodInfo.InternalInvoke(RuntimeMethodInfo rtmi, Object obj, BindingFlags invokeAttr, Binder binder, Object parameters, CultureInfo culture, Boolean isBinderDefault, Assembly caller, Boolean verifyAccess, StackCrawlMark& stackMark)

                 at System.Reflection.RuntimeMethodInfo.InternalInvoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture, StackCrawlMark& stackMark)

                 at System.Reflection.MethodBase.Invoke(Object obj, Object[] parameters)

                 at System.Delegate.DynamicInvokeOne(Object[] args)

                 at System.MulticastDelegate.DynamicInvokeImpl(Object[] args)

                 at System.Delegate.DynamicInvoke(Object[] args)

                 at System.Windows.Threading.DispatcherOperation.Invoke()

                 at System.Windows.Threading.Dispatcher.Dispatch(DispatcherPriority priority)

                 at System.Windows.Threading.Dispatcher.OnInvoke(Object context)

                 at System.Windows.Hosting.CallbackCookie.Invoke(Object[] args)

                 at System.Windows.Hosting.DelegateWrapper.InternalInvoke(Object[] args)

                 at System.Windows.RuntimeHost.ManagedHost.InvokeDelegate(IntPtr pHandle, Int32 nParamCount, ScriptParam[] pParams, ScriptParam& pResult)

Could anybody help me, please? Thanks!

Answer 1

You can't catch the exception but you can handle it gracefully. I have wrote a blog post about this and also answered this question several times in these forums already (try searching next time to save yourself some time). You can find the blog post here: http://rbrundritt.wordpress.com/2012/04/05/bing-maps-wpf-internet-connection-issue/

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http://rbrundritt.wordpress.com

Answer 2

You can't catch the exception but you can handle it gracefully. I have wrote a blog post about this and also answered this question several times in these forums already (try searching next time to save yourself some time). You can find the blog post here: http://rbrundritt.wordpress.com/2012/04/05/bing-maps-wpf-internet-connection-issue/

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http://rbrundritt.wordpress.com

Thanks you very much!