Question

I am new to WPF. I’m trying to write a program that makes use of the MVVM design pattern.

My program has a list of countries that are fetched from the database on startup, and are static after that. Where is the place to put these? At the moment, I have them sitting at the top level of my ViewModel class hierarchy:

abstract class AbstractViewModel
{
    static Jurisdiction[] jurisdictionOptions;
    public Jurisdiction[] JurisdictionOptions
    {
        get {
            if (jurisdictionOptions == null)
            {
                using (var db = new DatabaseContext())
                {
                    jurisdictionOptions = db.Jurisdictions.ToArray();
                }
            }
            return jurisdictionOptions;
        }
    }
}

I can then set the ItemSource of UIElements to JurisdictionOptions.

Is this the correct way of implenting this?

Answer 1

If you are implementing the MVVM pattern you should also have a model class.

In general you should put your database code inside the model.