/// <summary>
/// Called when the dialog is ending.
/// </summary>
/// <param name="turnContext">The context object for this turn.</param>
/// <param name="instance">State information associated with the instance of this component
/// dialog on its parent's dialog stack.</param>
/// <param name="reason">Reason why the dialog ended.</param>
/// <param name="cancellationToken">A cancellation token that can be used by other objects
/// or threads to receive notice of cancellation.</param>
/// <returns>A <see cref="Task"/> representing the asynchronous operation.</returns>
/// <remarks>When this method is called from the parent dialog's context, the component dialog
/// cancels all of the dialogs on its inner dialog stack before ending.</remarks>
/// <seealso cref="OnEndDialogAsync(ITurnContext, DialogInstance, DialogReason, CancellationToken)"/>
/// <seealso cref="DialogContext.EndDialogAsync(object, CancellationToken)"/>
public override async Task EndDialogAsync(ITurnContext turnContext, DialogInstance instance, DialogReason reason, CancellationToken cancellationToken = default(CancellationToken))
{
// Forward cancel to inner dialogs
if (reason == DialogReason.CancelCalled)
{
var innerDc = new DialogContext(_dialogs, turnContext, GetDialogState(instance));
await innerDc.CancelAllDialogsAsync(cancellationToken).ConfigureAwait(false);
}
await OnEndDialogAsync(turnContext, instance, reason, cancellationToken).ConfigureAwait(false);
}
public static void Fail(this DialogContext dc, Exception ex)
{
dc.PostAsync(ex.Message).Wait();
dc.CancelAllDialogsAsync().Wait();
}
