/// <summary>
/// Handle navigated event, ensuring the new view
/// is properly initialized with a viewmodel.
/// </summary>
public void Navigated(object sender, NavigationEventArgs e)
{
// indicate navigation
var oldVm = _currentViewModel as IViewModel;
if (oldVm != null)
{
oldVm.NavigatedAway();
}
_currentViewModel = null;
if (e.Content == null)
{
return;
}
_currentView = (Control)e.Content;
object newViewModel = null;
if (e.NavigationMode == NavigationMode.Back)
{
// use existing viewmodel for view
newViewModel = _currentView.DataContext;
}
else
{
// get query parameter
var uri = e.Uri.OriginalString;
string queryString = null;
var param = uri.IndexOf("?");
if (param > 0)
{
queryString = uri.Substring(param + 1);
}
// create and/or initialize viewmodel
var vmf = new ViewModelFactory();
newViewModel = vmf.CreateViewModel(_currentView, queryString);
}
// update current view
_currentViewModel = newViewModel as IShowStatus;
// indicate navigation
var newVm = _currentViewModel as IViewModel;
if (newVm != null)
{
if (e.NavigationMode == NavigationMode.Back)
{
newVm.NavigatingBackTo();
}
else
{
newVm.NavigatingTo();
}
}
// set view datacontext if necessary
if (!ReferenceEquals(_currentView.DataContext, _currentViewModel))
{
_currentView.DataContext = _currentViewModel;
}
}
/// <summary>
/// Handle navigated event, ensuring the new view
/// is properly initialized with a viewmodel.
/// </summary>
public void Navigated(object sender, NavigationEventArgs e)
{
// indicate navigation
var oldVm = _currentViewModel as IViewModel;
if (oldVm != null)
oldVm.NavigatedAway();
_currentViewModel = null;
if (e.Content == null)
return;
_currentView = (Control)e.Content;
object newViewModel = null;
if (e.NavigationMode == NavigationMode.Back)
{
// use existing viewmodel for view
newViewModel = _currentView.DataContext;
}
else
{
// get query parameter
var uri = e.Uri.OriginalString;
string queryString = null;
var param = uri.IndexOf("?");
if (param > 0)
queryString = uri.Substring(param + 1);
// create and/or initialize viewmodel
var vmf = new ViewModelFactory();
newViewModel = vmf.CreateViewModel(_currentView, queryString);
}
// update current view
_currentViewModel = newViewModel as IShowStatus;
// indicate navigation
var newVm = _currentViewModel as IViewModel;
if (newVm != null)
if (e.NavigationMode == NavigationMode.Back)
newVm.NavigatingBackTo();
else
newVm.NavigatingTo();
// set view datacontext if necessary
if (!ReferenceEquals(_currentView.DataContext, _currentViewModel))
_currentView.DataContext = _currentViewModel;
}
