An example of how you can cache data within your application.

ASP.NET provides an OutputCache method that allows you to cache a page on the server so that future requests don't have to recreate the page. However, there may be times when you want to cache something programmatically so that you can use that object across multiple page. Luckily, this is very easy to do and here's a simple example that shows how to cache a DataTable for 1 hour:

 Public Function GetData() As DataTable  
   
    ' Create a new DataTable and set it to the cached version  
    Dim dt As New DataTable  
    dt = HttpContext.Current.Cache.Get("MyData")  
   
    ' Check if the DataTable exists in the cache  
    If dt Is Nothing Then  
         ' Place your code to get your data here  
         MyDataTable = ...  
   
         ' Add the DataTable to the cache  
         HttpContext.Current.Cache.Insert("MyData", MyDataTable, Nothing, DateTime.Now.AddHours(1), Cache.NoSlidingExpiration)  
   
         'Return the DataTable  
         Return MyDataTable  
    Else  
        ' Return the cached version  
        Return dt  
    End If  
   
 End Function