public static object GetDataContext(NavigationContext navContext)
{
string id;
if (navContext != null && navContext.QueryString != null &&
navContext.QueryString.TryGetValue(ViewModelIdArgumentName, out id))
{
return(ViewModelsRegistry.GetById(id));
}
return(null);
}
public void Navigate <T>(T viewModel)
{
var page = ViewsMap[viewModel.GetType()];
var frame = Application.Current.RootVisual as PhoneApplicationFrame;
if (frame == null)
{
throw new InvalidOperationException("Frame is null");
}
if (frame.Content is FrameworkElement)
{
var dc = ((FrameworkElement)frame.Content).DataContext;
if (dc != null && dc.Equals(viewModel))
{
return;
}
}
bool isRootPage = RootViewModels.Contains(viewModel.GetType());
if (isRootPage)
{
while (frame.BackStack.Any())
{
var entry = frame.RemoveBackEntry();
//TODO: log entry.Source;
}
}
bool navigationResult = frame.Navigate(GetPageUri(page, ViewModelsRegistry.Register(viewModel)));
if (!navigationResult)
{
//TODO: log and do smth
}
}