Pass more than one parameter to another page

Question

I’m making a windows phone application, in which the main screen( first screen) is made a calculation, and the result is displayed on a second screen.

I already managed to make the 'connection' between the two screens as follows

On page 1 or main screen:

     private void button2_Click(object sender, RoutedEventArgs e)
    {

        Uri caminho = new Uri("/Paginas/Resolucao.xaml?parametro=" textBlock1.Text, UriKind.Relative);
        NavigationService.Navigate(caminho);

    }

On Page 2 or secondary screen

    protected override void OnNavigatedTo(NavigationEventArgs e)
    {
        base.OnNavigatedTo(e);

        string parametroRecebido1 = NavigationContext.QueryString["parametro"];
        textBlock2.Text = parametroRecebido1;       
    }

But with these 'methods' I can only pass a variable( the variable that is in the textBlock1) I saw on that site http://www.geekchamp.com/tips/how-to-pass-data-between-pages-in-windows-phone-alternatives on Option3 that in order to pass more than one variable the following code would have to be done:

On page 1 or main screen;

    private void btnNavigate_Click(object sender, RoutedEventArgs e)
    {
    NavigationService.Navigate(new Uri("/Page1.xaml?parameter1=p1& parameter2=p2",UriKind.Relative));
    }

On the Second Screen;

    protected override void OnNavigatedTo(System.Windows.Navigation.NavigationEventArgs e)
    {
     base.OnNavigatedTo(e);
     string parameterValue1 = NavigationContext.QueryString["parameter1"];
     string parameterValue2 = NavigationContext.QueryString["parameter2"];  
    }

____ My question is this: : how do I pass for example my variables n1 and N2 in the first screen method

     NavigationService.Navigate(new Uri("/Page1.xaml?parameter1=p1&parameter2=p2", UriKind.Relative));

___ I tried to fit my variables n1 and N2 into this line of code as follows: ---- But GAVE ERROR

    NavigationService.Navigate(new Uri("/Page1.xaml?parameter1="+n1&+"parameter2=n2", UriKind.Relative));

___ I also tried to keep the code 'original' by modifying the name of the variables Thus:

     NavigationService.Navigate(new Uri("/Page1.xaml?parameter1=n1&parameter2=n2", UriKind.Relative));

But when displaying the results it only displayed the words 'n1' and 'N2' and not the values stored there

Who can help I will be immensely grateful :D

Answer 1

You can use Isolatedstoragesettings to store variables before going to the next screen.

To store:

IsolatedStorageSettings settings = IsolatedStorageSettings.ApplicationSettings;
settings["parameter1"] = this.txtboxDescription;
settings["parameter2"] = this.txtboxDescription2;
settings.Save();

To get, after you have passed to the next page (Navigationservice.Navigate(new Uri("/Page1.xaml')):

IsolatedStorageSettings settings = IsolatedStorageSettings.ApplicationSettings;
string txtboxDescription2 = settings["parameter1"];
string txtboxDescription2 = settings["parameter2"];

If it’s not string, you can cast the value:

Boolean saveLogin = (bool)settings["saveLogin"];

Answer 2

SOLUTION

I was informed by the user /users/21504/malkaviano that my mistake had only been in the use of quotation marks("). With the error corrected the code is as follows:

Main screen or front page

private void button2_Click(object sender, RoutedEventArgs e)
{
Uri caminho = new Uri("/Paginas/Resolucao.xaml?parametro="+n1+"&parametro2="+n2, UriKind.Relative);
NavigationService.Navigate(caminho);

}

My mistake was to separate & string and put it out of quotes(").

In case n1 and N2 are my variables;

On the Second Screen will look like this:

 protected override void OnNavigatedTo(NavigationEventArgs e)
{
    base.OnNavigatedTo(e);

    string parametroRecebido1 = NavigationContext.QueryString["parametro"]; 
    string parametroRecebido2 = NavigationContext.QueryString["parametro2"];


   textBlock1.Text = parametroRecebido1;
   textBlock2.Text = parametroRecebido2;

}

If you also want to pass from 1 to as many variables Voce want Voce will do as follows: In this case I will exemplify with three variables(n1,N2,N3)

On Main Screen

private void button2_Click(object sender, RoutedEventArgs e)
{
Uri caminho = new Uri("/Paginas/Resolucao.xaml?parametro="+n1+"&parametro2="+n2+"&parametro3="+n3 UriKind.Relative);
NavigationService.Navigate(caminho);

}

On the second screen

 protected override void OnNavigatedTo(NavigationEventArgs e)
{
    base.OnNavigatedTo(e);

    string parametroRecebido1 = NavigationContext.QueryString["parametro"]; 
    string parametroRecebido2 = NavigationContext.QueryString["parametro2"];
    string parametroRecebido3 = NavigationContext.QueryString["parametro3"];

   textBlock1.Text = parametroRecebido1;
   textBlock2.Text = parametroRecebido2;
   textBlock3.Text = parametroRecebido3;

}