using Entity Framework (C#) I have a User class which has ONE:MANY mapping to the UserRight class (simply, user has a set of rights). Each right is identified by a string. And now, because the maximum number of possible rights is finite (<10) I'd like to have 10 CheckBoxes and edit the subset of rights for a given user manually.
What is the nice way to do it?
James
Create a RightViewModel class to contain user rights:
public class RightViewModel : INotifyPropertyChanged
{
private string _name;
public string Name
{
get { return _name; }
set
{
_name = value;
Change("Name");
}
}
private bool _hasRight;
public bool HasRight
{
get { return _hasRight; }
set
{
_hasRight = value;
Change("HasRight");
}
}
public void Change(string strPropertyName)
{
if (PropertyChanged != null)
PropertyChanged(this, new PropertyChangedEventArgs(strPropertyName));
}
public event PropertyChangedEventHandler PropertyChanged;
}
Create a similar class for your user, containing a member Rightsof type ObservableCollection<RightViewModel>.
In you XAML, use an ItemsControl:
<ItemsControl ItemsSource="{Binding Rights}"
ItemTemplate="{StaticResource RightTemplate}"/>
And a template definition:
<DataTemplate x:Key="RightTemplate">
<CheckBox Content="{Binding Name}" IsChecked="{Binding HasRight, Mode=TwoWay}"/>
</DataTemplate>
Mode=TwoWay makes the binding update your RightViewModel instance.
Define the ItemsControl's ItemsPanel if you need to display your checkboxes with a different layout.
Finally set your user as the DataContext of your container.
