INotifyPropertyChanged or INotifyCollectionChanged with DataTable?

wpf binding inotifypropertychanged inotifycollectionchanged
Miguel picture Miguel · Apr 27, 2011 · Viewed 8.7k times · Source

Hi i am having some troube with DataTables. So What i need is to detect whenever i change any cell in the DataGrid of the DataTable that is binded.

How to do it? With INotifyPropertyChanged or with INotifyCollectionChanged?

Note: I am trying with INotifyPropertyChanged but it only detects when i set some value in the DataTable, and never when i change any value of any cell in the DataGrid, i already have tried OneWay and TwoWay but nothing happens.

Thanks in advance!

Answer

Andrew Shepherd picture Andrew Shepherd · Apr 27, 2011

The datagrid would be bound to a list of objects. If you want the grid to update when individual object properties change, than each contained object must implement the INotifyPropertyChanged interface.

The INotifyCollectionChanged is an interface that the collection should implement, and are for notifications of addition and removal events.

See the section "How to implement collections" on this page.

Here's a way to approach your problem:

  • Create a new class that exposes the properties currently held in each DataRow. On this class implement INotifyPropertyChanged.
  • Instead of a DataTable, use an ObservableCollection<T> or your new class.

ObservableCollection already implements INotifyCollectionChanged, so this saves you the effort of implementing it yourself.

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