How to scroll to a given row when WPF DataGrid is loaded - wpf

Question

I display a few thousand rows in a WPF DataGrid, but would like to automatically scroll to a specific row when it is loaded (and later also add a button to scroll to this specific row). Is it possible to achieve it via data binding or from a view model property?
Of course, I've already browsed the Internet, but could not find any corresponding property.. For exemple, SelectedCells only has a get accessor (but I don't think it would have scrolled whatsoever anyway). I don't think that the other properties, such as SelectedItem helps.
Thanks for any insights :-)

Answer 1

There are two options: scroll to a row without selecting it and scroll to a row and select it.
Scroll to row without selecting it
This solution works for any DataGrid.SelectionUnit value (cell or row based selection).
You set the row from a property in your view model, which binds to DataGrid.CurrentItem.
Scrolling must be handled by the DataGrid by handling the DataGrid.CurrentCellChanged event.
View model (must implement INotifyPropertyChanged)
object currentRow = this.DataSource[currentRowIndex];
this.CurrentRow = currentRow;
View.xaml
<DataGrid ItemsSource="{Binding DataSource}"
CurrentItem="{Binding CurrentRow}"
CurrentCellChanged="DataGrid_OnCurrentCellChanged" />
View.xaml.cs
private void DataGrid_OnCurrentCellChanged(object sender, EventArgs eventArgs)
{
var dataGrid = sender as DataGrid;
dataGrid.ScrollIntoView(dataGrid.CurrentItem);
}
Scroll to row by selecting it
This solution works only for DataGrid.SelectionUnit values DataGridSelectionUnit.FullRow or DataGridSelectionUnit.CellOrRowHeader (not cell-only based selection - cell-only solution must completely handle selection and scroll in view).
You set the selected row from a property in your view model, which binds to DataGrid.SelectedItem.
Scrolling must be handled by the DataGrid by handling the DataGrid.SelectionChanged event.
View model (must implement INotifyPropertyChanged)
object selectedRow = this.DataSource[currentRowIndex];
this.SelectedRow = selectedRow;
View.xaml
<DataGrid ItemsSource="{Binding DataSource}"
SelecetedItem="{Binding SelectedRow}"
SelectionChanged="DataGrid_OnCurrentCellChanged" />
View.xaml.cs
private void DataGrid_OnSelectionChanged(object sender, SelectionChangedEventArgs eventArgs)
{
var dataGrid = sender as DataGrid;
dataGrid.ScrollIntoView(dataGrid.SelectedItem);
}