RequestListener Class

Represents a listener to invoke read-write requests and subscriptions. This class cannot be inherited.

Inheritance Hierarchy

System.Object
Listener
TcHmiSrv.Core.Listeners.RequestListener
Namespace: TcHmiSrv.Core.Listeners
Assembly: TcHmiSrvExtNet.Core (in TcHmiSrvExtNet.Core.dll) Version: 1.3.0.0

Syntax

C#

public sealed class RequestListener : Listener, 
    IExternalCaller<string>

The RequestListener type exposes the following members.

Constructors

	Name	Description
	RequestListener	Initializes a new instance of the RequestListener class.

Properties

	Name	Description
	Type	Gets the type of the RequestListener. (Overrides Listener.Type.)

Methods

	Name	Description
	Equals	Determines whether the specified object is equal to the current object. (Inherited from Object.)
	GetHashCode	Serves as the default hash function. (Inherited from Object.)
	GetType	Gets the Type of the current instance. (Inherited from Object.)
	ToString	Returns a string that represents the current object. (Inherited from Object.)

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.

Reference

TcHmiSrv.Core.Listeners Namespace

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