/// <summary>
/// Asynchronously searches for contacts in the user’s contact data.
/// </summary>
/// <param name="contacts">The contacts which will be searched.</param>
/// <param name="filter">The filter to use to search for contacts.</param>
/// <param name="filterKind">The kind of filter to use when searching for contacts.</param>
/// <param name="state">A user-defined object that contains information about the operation.</param>
/// <returns>The task object representing the asynchronous operation. The Result property
/// on the task object returns search results.</returns>
public static Task<ContactsSearchEventArgs> SearchTaskAsync(this Contacts contacts, string filter, FilterKind filterKind, object state)
{
if (contacts == null)
throw new NullReferenceException();
var tcs = new TaskCompletionSource<ContactsSearchEventArgs>();
EventHandler<ContactsSearchEventArgs> handler = null;
handler = (sender, e) =>
{
contacts.SearchCompleted -= handler;
tcs.TrySetResult(e);
};
contacts.SearchCompleted += handler;
try
{
contacts.SearchAsync(filter, filterKind, state);
}
catch
{
contacts.SearchCompleted -= handler;
throw;
}
return tcs.Task;
}
public ContactSearchArguments(string filter, SearchKind searchKind, FilterKind filterKind, object state)
{
this.Filter = filter;
this.FilterKind = filterKind;
this.SearchKind = searchKind;
this.State = state;
}
/// <summary>
/// Gets a list of contacts in device address book filtered by search criteria
/// </summary>
/// <param name="searchTerm">Search term</param>
/// <param name="callback">Callback</param>
/// <param name="filter">Filter</param>
/// <returns>List of contact</returns>
private void SearchContacts(Action<List<Contact>> callback, FilterKind filter = FilterKind.None, string searchTerm = null)
{
var cons = new Contacts();
cons.SearchCompleted += (s, e) => callback(e.Results.ToList());
cons.SearchAsync(String.IsNullOrEmpty(searchTerm) ? string.Empty : searchTerm, filter, null);
}
/// <summary>
/// Gets a list of contacts in device address book filtered by search criteria
/// </summary>
/// <param name="searchTerm">Search term</param>
/// <param name="filter">Filter</param>
/// <returns>List of contact</returns>
public Task<List<Contact>> Search(string searchTerm, FilterKind filter)
{
var t = new TaskCompletionSource<List<Contact>>();
SearchContacts(s => t.TrySetResult(s),filter,searchTerm);
return t.Task;
}
private void PhoneApplicationPage_Loaded(object sender, RoutedEventArgs e)
{
InputScope scope = new InputScope();
InputScopeName scopeName = new InputScopeName();
contactFilterKind = FilterKind.DisplayName;
scopeName.NameValue = InputScopeNameValue.Text;
scope.Names.Add(scopeName);
contactFilterString.InputScope = scope;
//contactFilterString.Focus();
DoSearch();
ContactResultsData.Focus();
CheckInTimer.Interval = new TimeSpan(0, 0, 5);
CheckInTimer.Tick += TimerTick;
}