DataGrid Row Highlight Being Removed on ItemSource Refresh

Question

I have a DataGrid of People that I can delete People from. After I delete a Person I call the following method;

private void SetSelectedPerson(int personDeleted, int personID)
{
    if (peopleDataGrid.SelectedIndex > 0)
    {
        peopleDataGrid.SelectedIndex--;
    }
    else
    {
        peopleDataGrid.SelectedIndex = 0;
    }  
}

This does select the previous Row , however it removes the highlighting from the SelectedRow . This is not what I want as although the SelectedIndex is correct, it does not look like the Row is selected to the user.

I do refresh the DataGrid ItemSource so that the deleted Person is removed from the current Collection . If I don't refresh the ItemSource , the highlighting is correct but of course the deleted Person is not removed from the DataGrid .

I refresh the ItemSource using;

  People = await ReturnPeople();
  PeopleICollectionView = CollectionViewSource.GetDefaultView(People);
  peopleDataGrid.ItemsSource = PeopleICollectionView;
  DataContext = this;

How can I keep the highlighting of the Row on an ItemSource update?

EDIT: For Sakura

This is how I Bind the DataGrid if I remove the hard code of ItemSource ..

 People = await ReturnPeople();
 PeopleICollectionView = CollectionViewSource.GetDefaultView(People);
 DataContext = this;

And in the XAML ;

        <DataGrid x:Name="peopleDataGrid" IsReadOnly="true" Margin="10,15,10,5" ColumnWidth="*" FontSize="14" 
                      HeadersVisibility="Column" AutoGenerateColumns="False" CanUserAddRows="False" 
                      SelectionChanged="DataGridSelectionChanged" ItemsSource="{Binding PeopleICollectionView}">

However when I delete a person it doesn't update in the DataGrid ...

Answer 1

After I delete a Person I call the following method...

Firstly, if your DataGrid is single selected mode, when you delete selected item, the selected index will be set to -1. if it is multi selected mode, it will return index of one other selected item or -1 if don't have any. So you have to get the selected index of datagrid before you delete row. Then use this value after you delete.

Second, if your datagrid is binded correctly, you don't have to refresh the datacontext to make it update.
If you interested in fix this, post your binding code here.