private void MessagesList_ItemClick(object sender, ItemClickEventArgs e)
{
Debug.WriteLine(((Message)e.ClickedItem).Content);
Messages.Add(new Message(Guid.NewGuid().ToString(), Contacts[0], DateTime.Now));
MessagesList.UpdateLayout();
MessagesList.ScrollIntoView(Messages.Last());
}
private void ScrollToBottom()
{
if (MessagesList.Items != null)
{
var selectedIndex = MessagesList.Items.Count - 1;
if (selectedIndex < 0)
{
return;
}
MessagesList.SelectedIndex = selectedIndex;
}
MessagesList.UpdateLayout();
MessagesList.ScrollIntoView(MessagesList.SelectedItem);
}
// Handles messages from bot.
async Task ReadBotMessagesAsync(DirectLineClient client, string conversationId)
{
// Optionally set watermark - this is last message id seen by bot. It is for paging.
string watermark = null;
while (true)
{
// Get all messages returned by bot.
var convActivities = await client.Conversations.GetActivitiesAsync(conversationId, watermark);
watermark = convActivities?.Watermark;
// Get messages from your bot - From.Name should match your Bot Handle.
var messagesFromBotText = from x in convActivities.Activities
where x.From.Name == botHandle
select x;
// Iterate through all messages.
foreach (Activity message in messagesFromBotText)
{
message.Text = userName + message.Text;
await Windows.ApplicationModel.Core.CoreApplication.MainView.CoreWindow.Dispatcher.RunAsync(CoreDispatcherPriority.Normal,
() => {
// Add message to the list and update ListView source to display response on the UI.
if (!_messagesFromBot.Contains(message))
{
_messagesFromBot.Add(newActivity); // Adds user query to chat window.
_messagesFromBot.Add(message); // Adds bot reponse to chat window.
}
MessagesList.ItemsSource = _messagesFromBot;
// Auto-scrolls to last item in chat
MessagesList?.ScrollIntoView(MessagesList.Items[_messagesFromBot.Count - 1], ScrollIntoViewAlignment.Leading);
});
}
await Task.Delay(TimeSpan.FromSeconds(2)).ConfigureAwait(false);
}
}
