DataGrid - grid selection is reset when new Data is arrived

Question

I have such DataGrid

Answer 1

In case the new dataSource still contains your last selected item and if you are following MVVM pattern. All you need to do is Raise PropertyChanged event for your selecetdItem once data source is reloaded. Make sure your viemModel implements INotifyPropertyChanged interface.

EDIT

And in case you don't want to clear your datasource every now and then. Simply, use the ObservableCollection in place of the generic list. It internally implements INotifyCollectionChanged, so any addition or deletion of item in your collection will be reflected on your UI.