Programatically bringing a Datagrid row into view in WPF, MVVM - wpf

Question

I would like to bring a row of my data grid into view programatically. I have a more than 100 rows. When I create a row(which I am doing by adding an item to a observable collection) I would like that new row to be selected and bring that into view. I was able to select the new row in my code but could not do the scrolling. More over I want the first cell of the row to be in edit mode so that the user can input text. I am following MVVM pattern for the application and would like to keep zero code in my views. How Can I achieve this?
Any help or suggestion will be appreciated....
Update:
This what I did in my XAML
<telerik:RadGridView ItemsSource="{Binding AllPartClasses}"
SelectedItem="{Binding SelectedPartClassViewModel, Mode=TwoWay}"
SelectionMode="Single" IsSynchronizedWithCurrentItem="True">
in my view model I did this
void AddNewPartClassExecute()
{
PartClass newPartClass = new PartClass();
PartClassViewModel tempPartClass = new PartClassViewModel(newPartClass);
tempPartClass.IsInValid = true;
AllPartClasses.Add(tempPartClass);
SelectedPartClassViewModel = tempPartClass;
Global.DbContext.PartClasses.AddObject(newPartClass);
//OnPropertyChanged("AllPartClasses");
}
public PartClassViewModel SelectedPartClassViewModel
{
get
{
return _selectedPartClassViewModel;
}
set
{
_selectedPartClassViewModel = value;
OnPropertyChanged("SelectedPartClassViewModel");
}
}
It did not work for me.

Answer 1

For the regular WPF DataGrid you can use ScrollIntoView. In your view hookup the SelectionChanged event to the following in your view code-behind cs file.
private void OnSelectionChanged( object sender, SelectionChangedEventArgs e )
{
Selector selector = sender as Selector;
DataGrid dataGrid = selector as DataGrid;
if ( dataGrid != null && selector.SelectedItem != null && dataGrid.SelectedIndex >= 0 )
{
dataGrid.ScrollIntoView( selector.SelectedItem );
}
}

Answer 2

When following MVVM pattern you should not do a UI-specific stuff like scrolling from a code.
Solution would be simple - just bind DataGrid.SelectedItem to a property in ViewModel and when adding a new item in the items collection just update a property bound to SelectedItem so it would reference to just added item and data grid should select an appropriate row automatically.
<DataGrid
ItemsSource="{Binding UnderyingItemsCollection}"
SelectedItem="{Binding RecentlyAddedItem, Mode=TwoWay}"
IsSynchronizedWithCurrentItem="True">