Welcome to OGeek Q&A Community for programmer and developer-Open, Learning and Share
Welcome To Ask or Share your Answers For Others

Categories

0 votes
337 views
in Technique[技术] by (71.8m points)

c# - How to refresh the one but last ContentPage on the Navigation

Typically, one pops the current page using this from the NavigationStack:

   Navigation.PopAsync( true );

How to I use Navigation to redraw the page just before the current page?

Background: The current page changed something that need to get re-presented in the one but last page.

See Question&Answers more detail:os

与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
Welcome To Ask or Share your Answers For Others

1 Reply

0 votes
by (71.8m points)

I'm assuming that the data model that you are using is not observable/bindable and thus the page is not "auto-updated"...

You could use MessagingCenter to publish a "Refresh Event" to avoid coupling the two Pages with events...

In your MainPage:

MessagingCenter.Subscribe<MainPage> (this, "RefreshMainPage", (sender) => {
    // Call your main page refresh method
});

In your Second Page:

   MessagingCenter.Send<MainPage> (this, "RefreshMainPage");
   Navigation.PopAsync( true );

https://developer.xamarin.com/guides/xamarin-forms/messaging-center/


与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
OGeek|极客中国-欢迎来到极客的世界,一个免费开放的程序员编程交流平台!开放,进步,分享!让技术改变生活,让极客改变未来! Welcome to OGeek Q&A Community for programmer and developer-Open, Learning and Share
Click Here to Ask a Question

...