protected override void OnNavigatedFrom(NavigationEventArgs e)
{
base.OnNavigatedFrom(e);
ViewModelBase viewModel = DataContext as ViewModelBase;
if (viewModel != null)
{
viewModel.OnNavigatedFrom(NavigationHelper.FromArgs(e));
}
}
protected override void OnNavigatedFrom(NavigationEventArgs e)
{
base.OnNavigatedFrom(e);
NavigationArgs args = NavigationHelper.FromArgs(e);
ViewModelBase vm = DataContext as ViewModelBase;
if (vm != null)
{
vm.OnNavigatedFrom(args);
}
}
protected override void OnNavigatedTo(NavigationEventArgs e)
{
base.OnNavigatedTo(e);
string parameterKey = e.Parameter as string;
ViewModelBase viewModel = DataContext as ViewModelBase;
if (viewModel != null)
{
viewModel.OnNavigatedTo(NavigationHelper.FromArgs(e), parameterKey);
}
}
protected override void OnNavigatedTo(NavigationEventArgs e)
{
base.OnNavigatedTo(e);
NavigationArgs args = NavigationHelper.FromArgs(e);
string parametersKey = null;
if (NavigationContext.QueryString.ContainsKey("key"))
{
parametersKey = NavigationContext.QueryString["key"];
}
ViewModelBase vm = DataContext as ViewModelBase;
if (vm != null)
{
vm.OnNavigatedTo(args, parametersKey);
}
}