private async Task<IList<Contact>> SelectContactsAsync( SelectContactInteraction selectContact )
{
Contract.Requires( selectContact != null );
Contract.Ensures( Contract.Result<Task<IList<Contact>>>() != null );
var commitButtonText = selectContact.DefaultCommand?.Name;
var dialog = new ContactPicker();
dialog.DesiredFieldsWithContactFieldType.AddRange( selectContact.DesiredFields );
#if WINDOWS_PHONE_APP
TryIfImplemented( () => dialog.SelectionMode = selectContact.DesiredFields.Any() ? ContactSelectionMode.Fields : ContactSelectionMode.Contacts );
TryIfImplemented( () => { if ( !string.IsNullOrEmpty( commitButtonText ) ) dialog.CommitButtonText = commitButtonText; } );
#else
dialog.SelectionMode = selectContact.DesiredFields.Any() ? ContactSelectionMode.Fields : ContactSelectionMode.Contacts;
if ( !string.IsNullOrEmpty( commitButtonText ) )
dialog.CommitButtonText = commitButtonText;
#endif
if ( selectContact.Multiselect )
return await dialog.PickContactsAsync();
var contacts = new List<Contact>();
var contact = await dialog.PickContactAsync();
if ( contact != null )
contacts.Add( contact );
return contacts;
}
private static void InvokeCallbackCommand( SelectContactInteraction selectContact, IList<Contact> contacts )
{
Contract.Requires( selectContact != null );
Contract.Requires( contacts != null );
if ( contacts.Any() )
{
// set contacts and execute accept
selectContact.Contacts.ReplaceAll( contacts );
selectContact.ExecuteDefaultCommand();
}
else
{
// execute cancel
selectContact.ExecuteCancelCommand();
}
}
public static Task<IList<Contact>> RequestMultipleContactsAsync( this InteractionRequest<SelectContactInteraction> interactionRequest, string selectButtonText, IReadOnlyList<ContactFieldType> desiredFields )
{
Arg.NotNull( interactionRequest, nameof( interactionRequest ) );
Arg.NotNull( desiredFields, nameof( desiredFields ) );
if ( string.IsNullOrEmpty( selectButtonText ) )
selectButtonText = SR.SelectCaption;
var source = new TaskCompletionSource<IList<Contact>>();
SelectContactInteraction interaction = null;
interaction = new SelectContactInteraction()
{
Multiselect = true,
DefaultCommandIndex = 0,
CancelCommandIndex = 1,
Commands =
{
new NamedCommand<object>( "Select", selectButtonText, p => source.TrySetResult( interaction.Contacts ) ),
new NamedCommand<object>( "Cancel", SR.CancelCaption, p => source.TrySetResult( NoContacts ) )
}
};
interaction.DesiredFields.AddRange( desiredFields );
interactionRequest.Request( interaction );
return source.Task;
}