IMiddleware.OnTurnAsync(ITurnContext, NextDelegate, CancellationToken) Method
Definition
Important
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When implemented in middleware, processes an incoming activity.
public System.Threading.Tasks.Task OnTurnAsync (Microsoft.Bot.Builder.ITurnContext turnContext, Microsoft.Bot.Builder.NextDelegate next, System.Threading.CancellationToken cancellationToken = default);abstract member OnTurnAsync : Microsoft.Bot.Builder.ITurnContext * Microsoft.Bot.Builder.NextDelegate * System.Threading.CancellationToken -> System.Threading.Tasks.TaskPublic Function OnTurnAsync (turnContext As ITurnContext, next As NextDelegate, Optional cancellationToken As CancellationToken = Nothing) As TaskParameters
- turnContext
- ITurnContext
The context object for this turn.
- next
- NextDelegate
The delegate to call to continue the bot middleware pipeline.
- cancellationToken
- CancellationToken
A cancellation token that can be used by other objects or threads to receive notice of cancellation.
Returns
A task that represents the work queued to execute.
Remarks
Middleware calls the next delegate to pass control to the next middleware in the pipeline. If middleware doesn’t call the next delegate, the adapter does not call any of the subsequent middleware’s request handlers or the bot’s receive handler, and the pipeline short circuits.
The turnContext provides information about the incoming activity, and other data needed to process the activity.