Why aren't bound DataGridView cells being updated?

Question

I have successfully bound my DataGridView to a list. But, the grid doesn't refresh when I programatically change some of the properties of one of the objects within the list. If I click in the cell (or minimize and then maximize form), the displayed value is refreshed.

I read here that I should use a BindingList. The list I am using is an interface type which doesn't implement IBindingList. But, the concrete type being used to initialize the list does inherit off of BindingList. Any ideas?

Answer 1

Your list must implement IBindingList (or be a BindingList) and your object must implement INotifyPropertyChanged. Both conditions are required for your DataGridView to bind properly.

So if your data source would be, for instance, MyList<MyClass>, MyList must implement IBindingList and MyClass must implmenent INotifyPropertyChanged.

Here is a neat example: http://crazorsharp.blogspot.com/2009/06/inotifypropertychanged-how-to-and-when.html