首先在WPF MVVM实体框架中初始化数据库的文件

Question

I've got about six months experience with WPF/MVVM and am trying to incorporate EF Code First in my project. Two questions:

1. Is the layout in the image above the best to use? Is it better to use sub-projects or would sub-folders work just as well? I'm open to suggestions.

2. Got this code to work in MainWindow.xaml.cs :

    namespace someNamespace { /// <summary> /// Interaction logic for MainWindow.xaml /// </summary> public partial class MainWindow : Window { private EmployeeDBContext context = new EmployeeDBContext(); public MainWindow() { InitializeComponent(); Database.SetInitializer(new DropCreateDatabaseIfModelChanges<EmployeeDBContext>()); } private void Window_Loaded(object sender, RoutedEventArgs e) { System.Windows.Data.CollectionViewSource employeeViewSource = ((System.Windows.Data.CollectionViewSource)(this.FindResource("employeeViewSource"))); context.Employees.Load(); employeeViewSource.Source = context.Employees.Local; } private void Button_Search(object sender, RoutedEventArgs e) { //event handler code using (var context = new EmployeeDBContext()) { context.Employees.Add(employee); context.SaveChanges(); } } protected override void OnClosing(System.ComponentModel.CancelEventArgs e) { base.OnClosing(e); this.context.Dispose(); } private void Button_Exit(object sender, RoutedEventArgs e) { this.Close(); } } } 

Answer 1

1. Sub-folders or projects makes little difference. If you have separate projects you can build them one at a time - a bit faster.
   
   2. I'm pretty new to MVVM too but I do know that you should keep code-behind to a minimum. What you wrote there should be done using RelayCommands. Also you wouldn't call the dbContext from the ViewModel. The ViewModel talks to a Dataservice which manages the dbContext.
   
   Not sure what the title means. Are you asking where to put your ADONet Entity Data Model?