CODEWITHSUNDEEP
windows-phone-7parameter-passing
Sam
Sam

Reputation: 28999

WP7: Pass parameter to new page?

In a Windows Phone 7 Silverlight application I call a new page using 

NavigationService.Navigate(new Uri("/View/SecondPage.xaml", UriKind.Relative));

Now I want to pass parameters to the new page. I understand a simple parameter can be passed using:

NavigationService.Navigate(new Uri("/View/TilgungsratePage.xaml?id=4711", UriKind.Relative));

and read in the new page using

protected override void OnNavigatedTo(Microsoft.Phone.Navigation.PhoneNavigationEventArgs e) 
{ 
    base.OnNavigatedTo(e); 
    String id = NavigationContext.QueryString["id"]; 
}

For simple parameters this is ok, but how do I pass a list?
Complex objects?
Anything but simple values?

Upvotes: 23

Views: 26601

Answers (5)

jihchuan
jihchuan

Reputation: 307

Use global variables, make a new class for GlobalVariables:

public static class GlobalVariables
{
   public static string my_string = "";
   public static int my_int = -1;
}

Then you can access the Global Variables class for different pages:

GlobalVariables.variable_name;

Upvotes: 0

w.donk
w.donk

Reputation: 3262

You should save the object to IsolatedStorage.

Just Serialize it with Json.net library and save the string to IsolatedStorage. On the next page get the string from IsolatedStorage and convert it back to the object you want with the json.net library!

Upvotes: -1

Ilya Builuk
Ilya Builuk

Reputation: 2179

take a look how I've implemented navigation in PhoneCore Framework: A framework for building of WP7 application. Shortly, I've built my navigation service on top of WP7 navigation. It uses custom page mapping and allows to pass custom parameters to view model automatically.

Upvotes: 0

Lars
Lars

Reputation: 6529

In his book "Programming Windows Phone 7" (chapter 6, section 3, "Sharing Data Among Pages") Charles Petzold recommends properties in the App class (derived from Application). Every page has access to it via Application.Current. Also interesting is the dictionary PhoneApplicationService.Current.State. It's usefull for tombstoning. The whole chapter maybe interesting for reading.

Upvotes: 21

Chris Nicol
Chris Nicol

Reputation: 10366

You should also look at MVVM pattern and the messenger class.

Here's some references:

MVVM Overview

MVVM Foundation Messenger

Good SO question on the messenger from MVVM Light

MVVM Light Blog

Upvotes: 2

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