Sqlcachedependency not invalidating

The following code sets up the cache dependency: Hopefully after reading this you can go ahead and start using this great technology.This will not only dramatically improve the performance on your website, but will also solve the problem of ASP. The source code of this article in C# can be downloaded from here. NET have been around for a very long time, but their constant growth means there’s always more to learn. Use these concepts to deepen your existing knowledge of C# and . Click here to Explore the Table of Contents or Download Sample Chapters!In the following example we’ll use SQL Server 2005 and the Pubs database.If you don’t have a copy of the pubs database, you can go here to download it.

However, the lifetime value of this cache is generally defined so that the application can periodically update the cache with new values from the database, irrespective of whether the data in the back end has changed or not. With query notification enabled then when you run a query against the back-end database, you not only retrieve the data into the cache, but also tell SQL Server to register a subscription for notification if the underlying data changes in a way that will affect the result of the query.However, the article should also interest developers as it will enable them to implement QN in their ASP.NET applications, without causing performance degradation of their SQL Server machines.Query notification allows your applications to take advantage of caching, safe in the knowledge that the cache will be refreshed whenever any critical data in the underlying database is updated. With the advent of SQL Server 2005, your application can request SQL Server to notify it when critical data in a database has changed.Up to that point, an application can safely continue to retrieve data from the cache.

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