How to select a row or cell in the datagrid in a silverlight application

Hi,
Saying you have a data grid and a button on your main page:

<Grid x:Name="LayoutRoot" Background="White" >

        <sdk:DataGrid Name="dg" SelectionChanged="DgSelectionChanged" Width="200" Height="200"/>
        <Button Content="Start" Click="ButtonClick" Width="200" Height="20" Margin="12,24,188,256" />
    </Grid>

Event for loading some data when button is clicked:

private void ButtonClick(object sender, RoutedEventArgs e)
        {
            var persons = new List<Person>
                              {
                                  new Person {Name = "Name 1", Address = "Address 1"},
                                  new Person {Name = "Name 2", Address = "Address 2"}
                              };
            dg.AutoGenerateColumns = true;
            dg.ItemsSource = persons;
            dg.SelectionMode = DataGridSelectionMode.Single;
        }

Where person:

public class Person
    {
        public string Name { get; set; }

        public string Address { get; set; }
    }

And when selection changes fire the following event that will do the job you need:

private void DgSelectionChanged(object sender, SelectionChangedEventArgs e)
{
var dataGrid = sender as DataGrid;

if (dataGrid != null)
{
int selectedIndex = dataGrid.SelectedIndex;
if (selectedIndex > -1)
{
DataGridColumn column = dataGrid.Columns[0];
FrameworkElement fe = column.GetCellContent(dataGrid.SelectedItem);
FrameworkElement result = GetParent(fe, typeof(DataGridCell));

if (result != null)
{
var cell = (DataGridCell)result;
//changes the forecolor
cell.Foreground = new SolidColorBrush(Colors.Blue);
//how to get cell value?

var block = fe as TextBlock;
if (block != null)
{
string cellText = block.Text;
MessageBox.Show(cellText);
}
}
}
}
}

private FrameworkElement GetParent(FrameworkElement child, Type targetType)
{
object parent = child.Parent;
if (parent != null)
{
if (parent.GetType() == targetType)
{
return (FrameworkElement)parent;
}
return GetParent((FrameworkElement)parent, targetType);
}
return null;
}

Let me know if this helped you.