Question

Well, well, this is my very first question in StackOverflow! I’ve been using this site since ages but I never had to ask something because I always found the answer in someone else’s question lol Apparently this is not the case anymore lol.

Anyway, I’m trying to bind a list of a custom class (that is decorated to be used with the DataContext that manages a local SQL Server CE 3.5 database – natively included in Windows Phone 7.5) to a ListPicker control from the WPToolkit and strangely I can’t see the value of the element I bound in the ListPicker (I made sure the list is populated).

Here’s the class:

[Table(Name = "Rubriques")]
class Rubrique
{
    [Column(IsPrimaryKey = true, DbType = "TINYINT", CanBeNull = false)]
    public Byte Id { get; set; }

    [Column(DbType = "NVARCHAR(40)")]
    public String Nom { get; set; }
}

Here’s the DataContext:

class IntermediaireDataContext : DataContext
{
    public IntermediaireDataContext() : base("Data Source='isostore:/IntermediaireBDD.sdf';")
    {
    }

    public Table<Rubrique> Rubriques
    {
        get { return this.GetTable<Rubrique>(); }
    }
}

Here’s the code I use to bind the list to the ListPicker:

using (IntermediaireDataContext context = new IntermediaireDataContext())
{
    rubs = (from x in context.Rubriques select x).ToList<Rubrique>(); //rubs already exists
    RubListPicker.ItemsSource = rubs;
}

Here’s the XAML:

<toolkit:ListPicker x:Name="RubListPicker" SelectionMode="Single" FullModeHeader="Rubriques">
    <toolkit:ListPicker.ItemTemplate>
        <DataTemplate>
            <StackPanel>
                <TextBlock Text="{Binding Nom}" FontSize="16"/>
            </StackPanel>
        </DataTemplate>
    </toolkit:ListPicker.ItemTemplate>
    <toolkit:ListPicker.FullModeItemTemplate>
        <DataTemplate>
            <StackPanel>
                <TextBlock Text="{Binding Nom}" FontSize="26" FontWeight="Bold"/>
            </StackPanel>
        </DataTemplate>
    </toolkit:ListPicker.FullModeItemTemplate>
</toolkit:ListPicker>

The list of Rubrique rubs gets populated and is set as ItemsSource to RubListPicker and if I remove the Text="{Binding Nom}" of the TextBlock in the DataTemplate I can see the name of the class MyNamespace.Rubrique in every element in the ListPicker.

I can’t figure out what is the problem with the data binding… Any help would be greatly appreciated 🙂

I’m using the last version of WPToolkit 4.2012.10.30 from NuGet in Visual Studio 2012 Ultimate with the Windows Phone 8 SDK.

Thanks for taking the time to read this!

Regards,

Ali

---

EDIT

I found the solution and it made me laugh hard lol.

I had to change de security level of my class Rubrique; When I did set it to public everything worked fine.

Actually, the ListPicker had access to the List<Rubrique> but could not access the value of each Rubrique.

A good one to remember for the future: Always check the security level of your classes/attributes/methods when using external libraries.

Answer 1

This is my first question ever in StackOverflow and I get to answer it myself: Like A Boss 😀

So the trick was to make my class public so it can be accessed by the ListPicker control from WPToolkit 😉

Cheers!