pass the URI parameter/value to linq

[thejeraldo]

hi. im having trouble passing the value that i get from another page to my linq.
my code is:

on my first page i have..

NavigationService.Navigate(new Uri("/ViewPage.xaml?articleID=I", UriKind.Relative));

then on my 2nd page to retrieve the value i have..

protected override void OnNavigatedTo(System.Windows.Navigation.NavigationEventArgs e)
        {
            string articleNo = NavigationContext.QueryString["articleID"];
            base.OnNavigatedTo(e);
            MessageBox.Show("ID: " + articleNo);
        }

problem is on my 2nd page.. its not showing the data if i put it like this..
the articleNo is not returning the value from the recent page hence the linq is having a null result.

XDocument loadedData = XDocument.Load("phconstitution.xml");

            var data = from query in loadedData.Descendants("article")
                       where query.Attribute("Title").Value == articleNo
                       select new article()
                       {
                           Title  = query.Attribute("Title").Value,
                           SubTitle = query.Attribute("SubTitle").Value,
                           Content = query.Attribute("Content").Value
                       };

[josueyeray]

Hi!

In your messageBox you see the correct value in articleNo? Are you tested to substitute articleNo in your LinQ with the direct value to test if it is a problem with the query? Are you executing the linq on the OnNavigatedTo method??

[thejeraldo]

hi thanks for the response josueyeray. it did worked when i put my linq inside the OnNavigatedTo method.
just one more question though. before i was executing my linq after InitializeComponent(); is this right? i mean is this the equivalent of a form_load in wp7?
thanks for the help.

[josueyeray]

Hi!

In Windows Phone the pages has the Loaded event that you can attach to and is raised when the page is complete loaded.

But, for Fast app switching and tombstoning is better to do all your page initialization in the OnNavigatedTo method, because is called every time the page is showed even if you are coming from tombstoning or FAS.

[pravejnini]

please see the link its navigate one page to second page
http://blogs.microsoft.co.il/blogs/s...es-part-1.aspx

see the link
http://stackoverflow.com/questions/4...rlight-and-wp7

other way find the xml path use IsolatedStorageFileStream

XDocument xmlDoc = null;
IsolatedStorageFileStream isoStream;
IsolatedStorageFile isoStore = IsolatedStorageFile.GetUserStoreForApplication()
using (isoStream = new IsolatedStorageFileStream("phconstitution.xml", FileMode.OpenOrCreate, isoStore))
xmlDoc = XDocument.Load(isoStream);
Title = xmlDoc.Element("parentNode").Element("Title").Value.ToString();