Xaml：
<DataGrid ItemsSource="{Binding SessionList}"
Grid.Row="2"
Grid.Column="0"
Grid.ColumnSpan="2"
AutoGenerateColumns="False"
ScrollViewer.CanContentScroll="False"
IsReadOnly="True"
HorizontalScrollBarVisibility="Auto"
SelectionMode="Single"
VerticalScrollBarVisibility="Auto"
MouseDoubleClick="datagrid_MouseDoubleClick"
CanUserAddRows="True"/>
cs代码：
private void datagrid_MouseDoubleClick(object sender, MouseButtonEventArgs e)
{
DataGrid datagrid = sender as DataGrid;
Point aP = e.GetPosition(datagrid);
IInputElement obj = datagrid.InputHitTest(aP);
DependencyObject target = obj as DependencyObject;
while (target != null)
{
if (target is DataGridRow)
{
break;
}
target = VisualTreeHelper.GetParent(target);
}
}