Silverlight 3 Datagrid: Get row/item on MouseOver

I have a bound DataGrid and various other controls(external to the datagrid) that show more details about the selectedrow in the datagrid. T开发者_如何转开发his is easy to do with databinding or handling the SelectionChanged event on the datagrid.

However, how do I do this without requiring the user to select a row - eg on 'mouseover' can I change the selected item or get the row/item 'under' the mouse.

---

Try something like this in your container class like UserControl, Grid, StackPanel, etc...

public class MyContainerClass : FrameworkElement
{
    public MyContainerClass()
    {
            base.Loaded += OnLoaded;
    }

    private void OnLoaded(object sender, RoutedEventArgs e)
    {
        m_DataGrid.MouseMove += OnMouseMove;
    }

    private void OnMouseMove(object sender, MouseEventArgs e)
    {
        DataGridRow item = (sender as DependencyObject).ParentOfType<DataGridRow>();
        if (item != null && m_DataGrid.SelectedIndex != item.GetIndex())
            m_DataGrid.SelectedIndex = item.GetIndex();
    }
}

And add this helper class extension...

internal static class DependencyObjectExt
{
    // Extension for DependencyObject
    internal static TT ParentOfType<TT>(this DependencyObject element) where TT : DependencyObject
    {
        if (element == null)
            return default(TT);

        while ((element = VisualTreeHelper.GetParent(element)) != null)
        {
            if (element is TT)
                return (TT)element;
        }

        return null;
    }
}

Good luck,
Jim McCurdy
YinYangMoney

---

Here is a simpler but less generic implementation of Jim's answer. In VB.Net:

Private Sub DataGrid1_LoadingRow(ByVal sender As Object, ByVal e As System.Windows.Controls.DataGridRowEventArgs) Handles DataGrid1.LoadingRow
    AddHandler e.Row.MouseEnter, AddressOf row_MouseEnter
End Sub

Private Sub row_MouseEnter(ByVal sender As Object, ByVal e As MouseEventArgs)
        Dim row = CType(sender, DataGridRow)
        Me.DataGrid1.SelectedItem = CType(row.DataContext, MyType)
End Sub