Question

I am creating a application in Windows Phone 7 Mango, and when I load up the application, the MainViewModel loads all the info from a file in isolated storage, with this function:

 private ObservableCollection<KasutajadViewModel> LoadUsers()
    {
        ObservableCollection<KasutajadViewModel> kasutajad = new ObservableCollection<KasutajadViewModel>();
        try
        {
            using (IsolatedStorageFile myIsolatedStorage = IsolatedStorageFile.GetUserStoreForApplication())
            {
                using (IsolatedStorageFileStream stream = myIsolatedStorage.OpenFile("Kasutajad.xml", FileMode.Open))
                {
                    XmlSerializer serializer = new XmlSerializer(typeof(ObservableCollection<PiletViewModel>));
                    //ObservableCollection<KasutajadViewModel> data
                    kasutajad =
                        (ObservableCollection<KasutajadViewModel>)serializer.Deserialize(stream);
                    stream.Close();
                }
            }
        }
        catch (Exception)
        {

        }
        return kasutajad;
    }

Problem is, that the deserializer doesn’t return the data.
Even when the XML file it reads from is like this:

<?xml version="1.0" encoding="utf-8"?>
<ArrayOfKasutajadViewModel xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"   xmlns:xsd="http://www.w3.org/2001/XMLSchema">
 <KasutajadViewModel>
    <Nimi>Reigo Hein</Nimi>
    <Isikukood>96952422597</Isikukood>
 </KasutajadViewModel>
</ArrayOfKasutajadViewModel>       

That is produced by a SaveUsers function, but I think this is redundant for the problem.
The LoadUsers loads the stream correctly, but the deserialization doesn’t output the required data.

Hope anyone can help me, thank you.

Answer 1

You’re creating a XmlSerializer for an ObservableCollection of PiletViewModel, yet you’re deserializing an array of KasutajadViewModel. There’s a type inconsistency here.