RequestListener Events

The RequestListener type exposes the following members.

Events

	Name	Description
	OnRequest	Called when a client requests a symbol from the domain of the TwinCAT HMI server extension. This event will be called multiple times if RequestType equals Subscription. In a subscription the returned data will only be sent to clients if either the read value or the return codes changed.
	OnRequestAsync	Called when a client requests a symbol from the domain of the TwinCAT HMI server extension. This event will be called multiple times if RequestType equals Subscription. In a subscription the returned data will only be sent to clients if either the read value or the return codes changed.

Further Information