Hello,
I need to call a WCF service. I generated a WCF proxy (using slsvcutil)
according to tutorial
http://wiki.ios.xamarin.com/HowTo/WebServices/Using_WCF and used it in the
Mono for Android project. I made WCF proxy to the same service as tutorial
http://docs.xamarin.com/android/tutorials/consuming_web_services uses
(calculator service). My code for calling calculator WCF service looks like
this:
var ws = new CalculatorClient(new BasicHttpBinding(), new
EndpointAddress("http://ws1.parasoft.com/glue/calculator";));
ws.addCompleted += delegate(object s, addCompletedEventArgs ev)
{
Log.Info("Test", "Add result: {0}", ev.Result.ToString());
};
ws.addAsync(10, 20);
But after calling addAsync method is thrown exception:
10-14 07:38:41.826 E/mono ( 292): Unhandled Exception:
System.Reflection.TargetInvocationException: Exception has been thrown by
the target of an invocation. ---> System.NullReferenceException: Object
reference not set to an instance of an object
10-14 07:38:41.826 E/mono ( 292): at
CalculatorClient+CalculatorClientChannel.Endadd (IAsyncResult result)
[0x00000] in <filename unknown>:0
10-14 07:38:41.826 E/mono ( 292): at
CalculatorClient.ICalculator.Endadd (IAsyncResult result) [0x00000] in
<filename unknown>:0
10-14 07:38:41.826 E/mono ( 292): at CalculatorClient.OnEndadd
(IAsyncResult result) [0x00000] in <filename unknown>:0
10-14 07:38:41.826 E/mono ( 292): at
System.ServiceModel.ClientBase`1+<InvokeAsync>c__AnonStoreyD[ICalculator].<>m__A
(IAsyncResult ar) [0x00000] in <filename unknown>:0
10-14 07:38:41.826 E/mono ( 292): --- End of inner exception stack
trace ---
10-14 07:38:41.826 E/mono ( 292): at
System.ComponentModel.AsyncCompletedEventArgs.RaiseExceptionIfNecessary ()
[0x00000] in <filename unknown>:0
10-14 07:38:41.826 E/mono ( 292): at addCompletedEventArgs.get_Result
() [0x00000] in <filename unknown>:0
10-14 07:38:41.826 E/mono ( 292): at
TestWebServicesAndroid2.Activity1.<OnCreate>b__0 (System.Object s,
.addCompletedEventArgs ev) [0x00000] in <filename unknown>:0
What is wrong with that? What I made wrong?
Best Regards,
Peter
--
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