Defines a callback method for notifying applications after a request for asynchronous add operation
completes.
Namespace: Alachisoft.NCache.Web.CachingAssembly: Alachisoft.NCache.Web (in Alachisoft.NCache.Web.dll) Version: 4.1.0.0 (4.1.0.0)
Syntax
C# |
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public delegate void AsyncItemAddedCallback( string key, Object result ) |
Visual Basic |
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Public Delegate Sub AsyncItemAddedCallback ( _ key As String, _ result As Object _ ) |
Visual C++ |
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public delegate void AsyncItemAddedCallback( String^ key, Object^ result ) |
Parameters
- key
- Type: System..::..String
The cache key used to reference the item.
- result
- Type: System..::..Object
The result of the Async Operation. If the operation completes successfully, it contatins Success otherwise it contains an OperationFailedException indicating the cause of operation failure.
Remarks
Since this handler is invoked every time an item is added to 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 AsyncItemAddedCallback class to notifiy
an application when a request for asynchronous add operation completes. Client applications recieve the notification
if the operation is successful or not. You could include this
code in a code declaration block in the Web Forms page, or in a page code-behind file.
CopyC#
public void OnAsyncItemAdded(string key, object result) { // ... } protected void Application_Start(object sender, EventArgs e) { try { NCache.InitializeCache("myCache"); CacheItem item = new CacheItem("value"); item.AsyncItemAddCallback = new AsyncItemAddCallback(OnAsyncItemAdded); NCache.Cache.AddAsync("key", item); } catch(Exception e) { } }