Question

My scenario is below:

I am using EF4 and use linq.
I have a datagrid which is bound to a ICollectionView (bacause I use filtering) as below:

view = CollectionViewSource.GetDefaultView(lstOrdsRlsd);
                if (lstOrdsRlsd.Count > 0)
                {
                    dgRecords1.ItemsSource = view;
                }

where lstOrdsRlsd is an observablecollection.

My problem is :

I need to refresh the datagrid when something is changed in the database (whether its adding a new row or changing some property of one record etc).

I tried datagrid.Items.Refresh() which didnt work.
Can I use INotifyPropertyChanged in this case? Could someone give some sample code about how to implement this?

Thanks

Answer 1

You can try using the DbSet<>.Local property. This is an observable collection with all the rows that you have queries from you database context.

public ObservableCollection<T> DbSet<T>.Local

So if you do any queries later, and more rows comes back, the DbSet<>.Local collection will INotifyCollectionChanged for you. 🙂

So the next step is to then make sure EF fetches the new rows. You could use anything from Daniel Hilgarth’s answer to implement that.