I'm programming a bot that is using adaptive Cards ChoiceSet. Im trying to get the users choice. Now because the result doesnt Show in the Chat, I have to check in the OnTurnAsync
-Method, if the Message I get is a postback
. How do i do this? This is how I tried -> Null ReferenceException at if (dc.Context.Activity.GetType().GetProperty("ChannelData") != null)
if (string.IsNullOrWhiteSpace(activity.Text) && activity.Value != null)
{
activity.Text = JsonConvert.SerializeObject(activity.Value);
}
My OnTurnAsync-Method:
public async Task OnTurnAsync(ITurnContext turnContext, CancellationToken cancellationToken = default(CancellationToken)) { DialogContext dc = null; switch (turnContext.Activity.Type) { case ActivityTypes.Message: if (dc.Context.Activity.GetType().GetProperty("ChannelData") != null) { var channelData = JObject.Parse(dc.Context.Activity.ChannelData.ToString()); if (channelData.ContainsKey("postback")) { var postbackActivit = dc.Context.Activity; postbackActivit.Text = postbackActivit.Value.ToString(); await dc.Context.SendActivityAsync(postbackActivit); } } await ProcessInputAsync(turnContext, cancellationToken); break;
It's because of your line: DialogContext dc = null
.
It should be: var dc = await Dialogs.CreateContextAsync(turnContext);
Note that Dialogs
might need to be replaced with whatever you defined your DialogSet
with. There's a few different ways to do it, but here's the upper half of my <myBot>.cs
class that I used to test your previous issue:
public class QuickTestBot_CSharpBot : IBot
{
private readonly IStatePropertyAccessor<DialogState> _dialogStateAccessor;
private readonly ConversationState _conversationState;
public QuickTestBot_CSharpBot(ConversationState conversationState)
{
_conversationState = conversationState ?? throw new ArgumentNullException(nameof(conversationState));
_dialogStateAccessor = _conversationState.CreateProperty<DialogState>(nameof(DialogState));
Dialogs = new DialogSet(_dialogStateAccessor);
Dialogs.Add(new QuickDialog());
}
private DialogSet Dialogs { get; set; }
public async Task OnTurnAsync(ITurnContext turnContext, CancellationToken cancellationToken = default(CancellationToken))
{
var activity = turnContext.Activity;
var dc = await Dialogs.CreateContextAsync(turnContext);
if (string.IsNullOrWhiteSpace(activity.Text))
{
activity.Text = JsonConvert.SerializeObject(activity.Value);
}
[...]
Here's some links to a few good samples that also use Waterfall Dialogs, so you can see how they set up their <bot>.cs
class (note that they don't get input from adaptive cards...this is just to help you set up your waterfall dialog and OnTurnAsync
):
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