ASP.NET calendar control

[Lomex]

This is what I want to do:

Once the page loads, and this should happen only the first time the page loads, I want to populate a dataset with data for the calendar from the database. When the user clicks on the calendar day, I want it to read data from the dataset and display the information for that day. Once the user selects something else to display in the calendar, on a button click, I want to re-populate the dataset with the appropriate data from the database.

The reason for this is because I want to connect to the database only when the user selects something else to view, or when a new month is selected, therefore connecting to the database less frequently.

I have this kinda working. Only when the user selects something else to view on the calendar, I make it pretty by changing the day color indicating that something is scheduled for that day, but once I click on the day, it reads old data from the dataset.

Is there a way to do what I want, or do I have to connect to the database everytime a page is refreshed/re-loaded???

Thanks