CODEWITHSUNDEEP
c#windows-phone-8
user1845258
user1845258

Reputation: 29

Use a variable on NavigationService.GoBack

NavigationService.GoBack(); I'm setting a variable in viewmodel and then I want to go back, when I'm back I want to use that variable, but nothing seems to run, I don't want to refresh that page.

Any ideas?

Here i'm setting variable, and i want to go back to my MainPage.

void item_click(object sender, RoutedEventArgs e)
   {

     Button b = e.OriginalSource as Button;

     App.ViewModel.bName = b.Content.ToString();
     App.ViewModel.bID = b.Name;

     this.NavigationService.GoBack();

    }

Here in my MainPage i want to run the check to se if variables has changed.

public MainPage()

    {
      /*
i don't want to run this actually, when i'm coming back from my secondarypage.

        InitializeComponent();
        InitializeSettings();

*/

            if (App.ViewModel.bName != null)
            {
                myButton.Content = App.ViewModel.bName;
                myButton.Name = App.ViewModel.bID;
            }
    }

Upvotes: 7

Views: 1306

Answers (2)

Mehdi Bugnard
Mehdi Bugnard

Reputation: 3979

I do not have understood everything but have you tried with the "App" class to declare a variable global to all pages instead of ViewModel?

Add maybe :

Use:

(App)App.Current

From this link: How to reference properties, global variable in app from other page for windows phone

Upvotes: 1

user1845258
user1845258

Reputation: 29

oh i'm sorry for the vague question, but i solved my problem.

this was needed in the mainpage.

protected override void OnNavigatedTo(System.Windows.Navigation.NavigationEventArgs e)
    {

        if (App.ViewModel.bName != null)
        {
            myButton.Content = App.ViewModel.bName;
            myButton.Name = App.ViewModel.bID;
        }


        base.OnNavigatedTo(e);

    }

Upvotes: 1

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