Deferred Class

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An object to wait for the status of a one time operation. See remarks.

Inheritance Hierarchy

SystemObject
Telogis.GeoBase.ConcurrencyDeferred

Namespace: Telogis.GeoBase.Concurrency
Assembly: geobase.net (in geobase.net.dll) Version: 4.99.0.0

Syntax

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public class Deferred

Public Class Deferred

The Deferred type exposes the following members.

Constructors

	Name	Description
	Deferred	Creates an AsyncEvent.

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Methods

	Name	Description
	BeginWait	Waits asynchronously for the event to complete.
	Defer(DeferredDeferredAction)	Invokes an action when the event occurs. If the event has already occurred action is invoked synchronously.
	Defer(DeferredExceptionHandler, DeferredDeferredAction)	Invokes an action when the event occurs. If the event has already occurred action is invoked synchronously.
	DeferAlways(DeferredDeferredAction)	Invokes an action once when the event reoccurs.
	DeferAlways(DeferredExceptionHandler, DeferredDeferredAction)	Invokes an action once when the event reoccurs.
	EndWait	Blocks until the event occurs. Returns immediately if the event has already occurred.
	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.)
	Set	Raises the event and synchronously invokes all waiting callbacks.
	ToString	Returns a string that represents the current object. (Inherited from Object.)
	Wait	Blocks until the event occurs. Returns immediately if the event has already occurred.

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Examples

The typical usage pattern is:

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class DirectionsCalculator {
    private Directions directions;
    private AsyncEvent readyEvent = new AsyncEvent();

    public DirectionsCalculator(Route route) {
        Thread thread = new Thread(() => {
            directions = route.GetDirections();
            readyEvent.Set();
        });
        thread.Start();
    }

    public IAsyncResult GetDirections(AsyncCallback callback, object state) {
        return readyEvent.BeginWait(callback, state);
    }

    public Directions EndGetDirections(IAsyncResult result) {
        readyEvent.EndWait(result);
        return directions;
    }
}

Reference

Telogis.GeoBase.Concurrency Namespace