System.Exception when running SearchAsync of Contacts in application_launching event handler 未处理Exception

Why do i get this exception:

System.Exception was unhandled

Message=Exception
StackTrace:
at
Microsoft.Phone.UserData.QueryDataEnumerable`1.EnsureInteropInit()
at
Microsoft.Phone.UserData.QueryDataEnumerable`1.GetNextBatch(Int32
nextIndex)
at
Microsoft.Phone.UserData.QueryDataEnumerator`1.MoveNext()
at
Microsoft.Phone.UserData.Contacts.GetContacts(Object state)
at
System.Threading.ThreadPool.WorkItem.WaitCallback_Context(Object
state)
at System.Threading.ExecutionContext.Run(ExecutionContext
executionContext, ContextCallback callback, Object state)
at
System.Threading.ThreadPool.WorkItem.doWork(Object o)
at
System.Threading.Timer.ring()

when i run these lines of code in the
"application_launching" event handler on App.xaml.cs
Contacts cons = new Contacts();
cons.SearchCompleted += new EventHandler<ContactsSearchEventArgs>(CompletedSearch);

cons.SearchAsync(null, FilterKind.PhoneNumber, null);

Note: if i comment out
the line

cons.SearchAsync(null, FilterKind.PhoneNumber, null);

I dont get an exception
anymore. But I need that to run in order for my app to
work!!

Thanks,
David

Re: System.Exception when running SearchAsync of Contacts in application_launching event handler Reply Quote

Hi, In WMMainfeast.xml,Did u set the capapability of the application to access contacts: <Capability Name="ID_CAP_CONTACTS"/>