如何访问不同页面中的 XAML 对象

我有一个包含 MainPage.xaml 文件的 Windows 10 应用程序.在那个文件中，我保存了基本菜单(hambuger 菜单)，并且有这个 Frame 对象，它允许我在菜单上的选择更改时加载新页面:<Frame Name="MyFrame"></Frame>

I have a Windows 10 app that has a MainPage.xaml file. In that file I hold the basic menu (hambuger menu) and there is this Frame object that allows me to load new pages when a selection on the menu changes: <Frame Name="MyFrame"></Frame>

所以当 ListBox 中的选择发生变化时，有一个非常简单的事件处理程序:MyFrame.Navigate(typeof(WeekPage));

So when the selection in the ListBox changes, there is this event handler that is pretty straightforward: MyFrame.Navigate(typeof(WeekPage));

这行代码加载带有另一个 XAML 页面的 Frame.现在我的问题是，在 WeekPage.xaml.cs 内部，我可以控制 MyFrame 对象的导航位置吗?

This line of code loads the Frame with another XAML page. Now my question is, inside of the WeekPage.xaml.cs, can I control where the MyFrame object navigates?

换句话说，我想从另一个 XAML 文件(MainPage.xaml)的代码隐藏中控制 XAML 对象及其属性(按钮、文本块、列表框)代码>WeekPage.xaml.cs).

In other words, I want to control XAML objects and their properties (buttons, textblocks, listbox) on one XAML file (MainPage.xaml) from the code-behind of another XAML file (WeekPage.xaml.cs).

我已经尝试了以下方法:<Frame Name="MyFrame" x:FieldModifier="Public"></Frame> 似乎根本没有帮助和设置使用 MainPage.tried.MyFrame.Navigate(typeof(StoryPage)); 在 MainPage.xaml.cs 上内部静态 NAMESPACE.MainPage 尝试过；在 WeekPage.xaml.cs(我从 here) 但是当我运行程序时我得到一个 System.NullReferenceException.

I have already tried the following: <Frame Name="MyFrame" x:FieldModifier="Public"></Frame> which didn't seem to help at all and setting up internal static NAMESPACE.MainPage tried; on MainPage.xaml.cs with MainPage.tried.MyFrame.Navigate(typeof(StoryPage)); on WeekPage.xaml.cs(I got that idea from here) but I get a System.NullReferenceException when I run the program.

另一个缩小我要查找内容的示例有一个 MainPage.xaml 包含应用程序的基本布局(汉堡菜单)，这取决于用户在汉堡菜单的ListBox"中单击的项目加载新框架，例如:WeekPage.xaml.WeekPage.xaml 有一个 GridView，当点击它时，应该用新的框架替换当前框架，并清除 ListBox 中的任何选择MainPage.xaml.见下面的代码:

Another example to narrow down on what I am looking for There is a MainPage.xaml that contains the basic layout for the app (hamburger menu), depending on the item that the user clicks on in the 'ListBox' in for the hamburger menu a new frame is loaded, for example: WeekPage.xaml. WeekPage.xaml has a GridView that, when clicked, should replace the current frame with a new one and clear out any selections on the ListBox in MainPage.xaml. See code below:

private void GridView_ItemClick(object sender, ItemClickEventArgs e)
{
    // Replacing current frame with new frame
    Frame.Navigate(typeof(StoryPage));
    // TODO: I need to clear out any selection in the ListBox item in MainPage.xaml
}