Defines a callback method for notifying applications when an item is updated in the Cache.

Namespace: Alachisoft.NCache.Web.Caching
Assembly: Alachisoft.NCache.Web (in Alachisoft.NCache.Web.dll) Version: 4.3.0.0 (4.3.0.0)

Syntax

C#
[ObsoleteAttribute("This delegate is deprecated. 'Please use CacheDataNotificationCallback(string key, CacheEventArg cacheEventArgs)'", 
	false)]
public delegate void CacheItemUpdatedCallback(
	string key
)
Visual Basic
<ObsoleteAttribute("This delegate is deprecated. 'Please use CacheDataNotificationCallback(string key, CacheEventArg cacheEventArgs)'", 
	false)> 
Public Delegate Sub CacheItemUpdatedCallback ( 
	key As String
)
Visual C++
[ObsoleteAttribute(L"This delegate is deprecated. 'Please use CacheDataNotificationCallback(string key, CacheEventArg cacheEventArgs)'", 
	false)]
public delegate void CacheItemUpdatedCallback(
	String^ key
)

Parameters

key
Type: System..::..String
The cache key used to reference the item.

Remarks

Since this handler is invoked every time an item is removed from the Cache, doing a lot of processing inside the handler might have an impact on the performance of the cache and cluster. It is therefore advisable to do minimal processing inside the handler.

Examples

The following example demonstrates how to use the CacheItemUpdatedCallback class to notifiy an application when an item is updated in the application's Cache object. You could include this code in a code declaration block in the Web Forms page, or in a page code-behind file.
 Copy imageCopy
public void OnItemUpdated(string k)
{
    // ...
}

protected void Application_Start(object sender, EventArgs e)
{
    try
    {
        NCache.InitializeCache("myCache");
        NCache.Cache.ItemUpdated += new CacheItemUpdatedCallback(this.OnItemUpdated);
    }
    catch(Exception e)
    {
    }
}

See Also