wpf 如何从页面级别获取父框架？
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How to get parent frame from page level?
提问by MajkeloDev
i have a window with a frame and few pages. When the window is loaded the frame is navigating to welcome page and when i click a button inside welcome page i want parent frame to navigate to another page. To do that i need to access parent frame from page level but i can't figure out how to do this. I tried code below but it's returning null:
我有一个带框架和几页的窗口。当窗口加载时，框架导航到欢迎页面，当我单击欢迎页面内的按钮时，我希望父框架导航到另一个页面。为此，我需要从页面级别访问父框架，但我不知道如何执行此操作。我尝试了下面的代码，但它返回空值：
private void myButton_click(object sender, RoutedEventArgs e)
{
SecondPage secPage = new SecondPage();
((this.Parent) as Frame).Navigate(secPage);
}
I checked what 'this.parent' is returning and it is null. How can I get parent frame so i can navigate from one page to another ?
我检查了 'this.parent' 返回的是什么，它是空的。如何获取父框架以便我可以从一页导航到另一页？
回答by King King
A Page also has a property called NavigationService. You can use this property for convenience to navigate between pages:
页面还有一个名为 的属性NavigationService。您可以使用此属性方便地在页面之间导航：
private void myButton_click(object sender, RoutedEventArgs e) {
SecondPage secPage = new SecondPage();
NavigationService.Navigate(secPage);
}
To access the parent Frame, you have to use VisualTreeHelperto walk up, and find the Frame. You can search more about it. Anyway using the NavigationServiceproperty is better.
要访问父 Frame，您必须使用VisualTreeHelper向上走，然后找到 Frame。您可以搜索更多相关信息。无论如何使用该NavigationService属性更好。
