How can a UWP User Control communicate with it's containing UWP Page

Question

I'm using visual Studio 2022 Preview, C++/winRT. My app has 8 pages and one User Control that contains code common to all pages. It needs to access the page that has focus

Answer 1

Hello, Welcome to Micorosoft Q&A,

My app has 8 pages and one User Control that contains code common to all pages.

For this scenario, the better way is using Messenger notification tool that comes from mvvmlight to send the message from UserrControl to focued page.

For example

using GalaSoft.MvvmLight.Messaging;  

private void Button_Click(object sender, RoutedEventArgs e)  
{  
    var message = "Test";  
    Messenger.Default.Send<string,TestPage>(message);  
    Tbk.Text = message;  
}  

Target Page

public TestPage()  
{  
    this.InitializeComponent();  
    this.Loaded += TestPage_Loaded;  
}  
  
private void TestPage_Loaded(object sender, RoutedEventArgs e)  
{  
    Messenger.Default.Register<string>(this, (s) =>  
    {  
        MyTextBlock.Text = s;  
    });  
}   

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