How to access objects between two xaml pages in wp7?

Question

I'm working on a wp7 application which consists of two xaml pages. Pages are Page1 and Page2. Page1 consists of a slider which has a range of values between 0 to 10. My program is,if I slide the slider to reach value = 10,it should navigate to Page2. So far so good. But when Page2 is loaded,I want my slider to set its value to 0. But when I press the "back" key on my windows phone,the Page2 navigates to Page1 & the slider has the value = 10 (which should be 0). I cannot do the coding of slider from Page2 because it cannot access it! How should I do it?

The program for Page1(MainPage) is

namespace ProgressBar
{
    public partial class MainPage : PhoneApplicationPage
    {
        public MainPage()
        {
            InitializeComponent();
        }

        private void slider1_ValueChanged(object sender, RoutedPropertyChangedEventArgs<double> e)
        {
            if (slider1.Value == 10)
            {
                NavigationService.Navigate(new Uri("/Page2.xaml", UriKind.Relative));
            }
        }
    }
}

score 1 · Answer 1 · answered Sep 17 '11 at 11:54

1

in this case just reset the slider to 0 before navigating to your Page2 or when you navigateback (there is a event for this in the NavigationService).

To share information accross your application in the general case you can just use static-classes/fields or objects your parse around or just persit the settings/info on file. It's the same as with any other environment.

answered Sep 17 '11 at 11:54

Random Dev

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I tried to reset slider to 0 before navigating.What I did is outside the if() block,I set the value as slider1.value=0; but as I run the prohram,the slider doesn't move at all! now what should I do? – Siddharth Thevaril Sep 17 '11 at 13:02
outside the if-block? You should do this before the NavigationService.Navigate call. – Random Dev Sep 17 '11 at 13:11
After the Navigation call works as well. A call to Navigate isn't the equivalent of a return statement, so all code in the same tree is still executed. – Claus Jørgensen Sep 17 '11 at 13:13

score 1 · Answer 2 · answered Sep 17 '11 at 12:15

1

Reset the Slider value to 0 in the Page.OnNavigatedTo event.

answered Sep 17 '11 at 12:15

Claus Jørgensen

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How do I do it? I've provided my code,please help me with the syntax & the coding as per your logic. – Siddharth Thevaril Sep 17 '11 at 13:00

How to access objects between two xaml pages in wp7?

2 Answers2