public TaskDetailsViewModel(NavigationTarget target)
{
if (target is TaskDetailsTarget)
{
LoadData((target as TaskDetailsTarget).TaskId);
}
if (target is CommentTarget)
{
LoadData((target as CommentTarget).TaskId);
_selectedComment = Comments.FirstOrDefault(x => x.Id == (target as CommentTarget).CommentId);
}
}
protected override void OnNavigatedTo(NavigationEventArgs e)
{
base.OnNavigatedTo(e);
var url = e.Parameter + "";
Target = Router.Current.CreateTarget(url);
if (((Frame)Window.Current.Content).CanGoBack) {
SystemNavigationManager.GetForCurrentView().AppViewBackButtonVisibility = AppViewBackButtonVisibility.Visible;
} else {
SystemNavigationManager.GetForCurrentView().AppViewBackButtonVisibility = AppViewBackButtonVisibility.Collapsed;
}
}
public string CreateUrl(NavigationTarget target)
{
var route = FindRoute(target);
var url = Scheme + route.UrlPattern;
var props = target.GetType().GetPropertiesHierarchical();
var routeVars = route.Segments.Where(x => x.IsVariable).Select(x => x.Name.ToLowerInvariant());
foreach (var prop in props) {
var value = Uri.EscapeDataString(prop.GetValue(target) + "");
if (routeVars.Contains(prop.Name.ToLowerInvariant())) {
url = url.Replace("{" + prop.Name.ToLowerInvariant() + "}", value);
} else if (prop.PropertyType == typeof(string) || prop.PropertyType.GetTypeInfo().IsValueType) {
url += url.Contains("?") ? "&" : "?";
url += prop.Name.ToLowerInvariant() + "=" + value;
}
}
return url;
}
public Route FindRoute(NavigationTarget target)
{
var route = _routes.FirstOrDefault(x => x.TargetType == target.GetType());
if (route == null)
{
throw new Exception("No route for NavigationTarget: " + target.GetType().Name);
}
return route;
}
protected override void Navigate(Route route, NavigationTarget target, string uri)
{
ContentFrame.Navigate(route.PageType, uri);
}
protected override void OnNavigatedTo(NavigationEventArgs e)
{
base.OnNavigatedTo(e);
var url = e.Parameter + "";
Target = Router.Current.CreateTarget(url);
}
