MVC is web front end architecture. View is the screen that user will use. Model is the class whose object will be used to represent data in the application. Controller is what handles user interaction and acts as glue that holds view and model together.
In your case, user request will come to Controller. Controller object will then validate the model through methods in Model or in a separate class (business). Then it will be sent to data access layer which will perform the database operations. You can make use of a suitable provider for the database you are using. For instance SqlConnection and other related classes for performing database operations. You can refer to MSDN or search CodeProject for articles for more details.
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