将参数从 app.xaml.cs 传递到 MainPage

Question

My application is launched by a protocol like my-app://path?param1=123"&"param2=abc .

I succeeded to get values from query parameters in app.xaml.cs's OnActivated handler.

But I can not override onNavigatedTo handler of MainPage class. VS says onNavigatedTo is not found.

How can I receive parameters on MainPage?

        protected override void OnActivated(IActivatedEventArgs e) {
            base.OnActivated(e);

            string argMessage = string.Empty;
            if (e.Kind == ActivationKind.Protocol)
            {
                ProtocolActivatedEventArgs eventArgs = e as ProtocolActivatedEventArgs;
                Debug.WriteLine("Procol URI="+eventArgs.Uri);
                argMessage = eventArgs.Uri.Query;
            }
            Frame rootFrame = Window.Current.Content as Frame;

            if (rootFrame == null)
            {
                rootFrame = new Frame();
                rootFrame.NavigationFailed += OnNavigationFailed;
                Window.Current.Content = rootFrame;
            }
            else
            {
                if (e.Kind == ActivationKind.Protocol)
                {
                    rootFrame.Navigate(typeof(MainPage), argMessage);
                }
            }
            if (rootFrame.Content == null)
            {
                    rootFrame.Navigate(typeof(MainPage), argMessage);
            }
            Window.Current.Activate();
        }

Answer 1

You can send any kind of objects in navigation function as param.

I can see it in your code itself,

rootFrame.Navigate(typeof(MainPage), argMessage);

Here "argMessage" is a object which you want send i guess.

IF you want send any other object , just pass it instead of argMessage .

And receive it in your mainpage like this

 var parameters = e.Parameter;

Here is some samples to understand it better

Navigation Between Pages With Passing Data On Windows 10

Passing complex object between classes in UWP

Hope this helps.

Thank you.