Method RegisterNotification

RegisterNotification(QueryDataNotificationCallback, EventType, EventDataFilter)

This method registers a custom callback that is fired on change in dataset of a Continuous Query.

Declaration
public void RegisterNotification(QueryDataNotificationCallback callback, EventType eventType, EventDataFilter datafilter)
Parameters
Type Name Description
QueryDataNotificationCallback callback

A delegate to register your custom method with.
EventType eventType

Describes whether the event is to be raised when an item is added, updated, or removed.
EventDataFilter datafilter

This enum is to describe when registering an event, upon raise how much data is retrieved from cache when the event is raised.
Examples

The following example shows how to register the notification callback. First, create an ItemCallback.

ItemCallback(string key, CacheEventArg e)
{
   ...
}

Then declare your Continuous Query.

ContinuousQuery cQ=new ContinuousQuery(query,Hashtable vals);

Then register your Notification Callback.

cQ.RegisterNotification(new QueryDataNotificationCallback(ItemCallback),EventType.ItemAdded, EventDataFilter.None);