ASP.NET Podcast Show #129 - Caching with .NET 3.5 SP1

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Original Url: http://aspnetpodcast.com/CS11/blogs/asp.net_podcast/archive/2008/12/04/asp-net-podcast-show-129-caching-with-net-3-5-sp1.aspx

Show Notes:

• New Caching Support in .NET 3.5 SP1.

Source Code:

    protected void Page_Load(object sender, EventArgs e)

    {

        string Output = String.Empty;

        if (!Page.IsPostBack)

        {

            lblOutput.Text = GetCacheItem();

        }

    }

    private string GetCacheItem()

    {

        string OutValue = String.Empty;

        if (Cache["Test"] != null)

        {

            OutValue = Convert.ToString(Cache["Test"]);

        }

        else

        {

            OutValue = DateTime.Now.ToString();

            Cache.Insert("Test", OutValue, null,

                DateTime.Now.AddSeconds(10),

                TimeSpan.Zero, OnUpdateCallback);

        }

        return (OutValue);

    }

    private void OnUpdateCallback(String key, CacheItemUpdateReason r,

        out Object ObjectToCreate, out CacheDependency CacheDependencies,

        out DateTime DateTimeExpire, out TimeSpan TimeSpanExpire)

    {

        ObjectToCreate = DateTime.Now;

        CacheDependencies = null;

        DateTimeExpire = DateTime.Now.AddSeconds(10);

        TimeSpanExpire = TimeSpan.Zero;

    }