Event handler in DataTemplate

I have WPF ComboBox inside a data template (a lot of comboboxes in listbox) and I want to handle enter button. It would be easy if it was e.g. a button - I would use Command + Relative binding path etc. Unfortunately, I have no idea how handle key press with a Command or how to set event handler from template. Any suggestions?

I've solved my problem by using a usual event handler where I walk through the visual tree, find corresponding button and call it's command. If anybody else has the same problem, please post a comment and I'll provide more details of realization.

UPD

Here is my solution:

I search the visual tree for a button and than execute command associated with button.

View.xaml:

<ComboBox KeyDown="ComboBox_KeyDown"/>
<Button Command="{Binding AddResourceCommand}"/>

View.xaml.cs:

private void ComboBox_KeyDown(object sender, KeyEventArgs e)
{
    if (e.Key == Key.Enter)
    {
        var parent = VisualTreeHelper.GetParent((DependencyObject)sender);
        int childrenCount = VisualTreeHelper.GetChildrenCount(parent);

        for (int i = 0; i < childrenCount; i++)
        {
            var child = VisualTreeHelper.GetChild(parent, i) as Button;
            if (null != child)
            {
                child.Command.Execute(null);
            }
        }
    }
}