protected override void OnBindingContextChanged()
{
base.OnBindingContextChanged();
var chatStream = BindingContext as ChatStreamViewModel;
if (chatStream != _chatStream && _chatStream != null)
{
_chatStream.DidInsertNextPage -= ChatStreamOnDidInsertNextPage;
_chatStream.DidCompleteInitialLoad -= ChatStreamOnDidCompleteInitialLoad;
_chatStream.WillInsertNextPage -= ChatStreamOnWillInsertItems;
}
if (chatStream != null && _chatStream != chatStream)
{
_chatStream = chatStream;
ItemsSource = _chatStream.Messages;
_chatStream.DidInsertNextPage += ChatStreamOnDidInsertNextPage;
_chatStream.DidCompleteInitialLoad += ChatStreamOnDidCompleteInitialLoad;
_chatStream.WillInsertNextPage += ChatStreamOnWillInsertItems;
}
}
public ChatPage()
{
InitializeComponent();
_viewModel = new ChatStreamViewModel();
BindingContext = _viewModel;
}
