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POBinding Observable Collection in XAML in Windows Phone
 

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    <p>I am having trouble with declaratively setting the ItemsSource of a ListBox contained within a PivotItem in a simple Windows Phone 7 page. I can successfully set the ItemsSource in code behind.</p> <p>Here is a snippet of the class that contains the ObservableCollection that I want to bind to:</p> <pre><code>sealed class Database : INotifyPropertyChanged { //Declare Instance private static readonly Database instance = new Database(); //Private Constructor private Database() { } //The entry point into this Database public static Database Instance { get { return instance; } } #region Collections corresponding with database tables public ObservableCollection&lt;Category&gt; Categories { get; set; } public ObservableCollection&lt;CategoryType&gt; CategoryTypes { get; set; } </code></pre> <p>And here is a sample of my XAML:</p> <pre><code>&lt;ListBox x:Name="CategoriesListBox" Margin="0,0,-12,0" ItemsSource="{Binding Categories}" DisplayMemberPath="Name" /&gt; </code></pre> <p>In my page I have tried setting the data context as follows:</p> <pre><code>this.DataContext = Database.Instance; </code></pre> <p>However the binding does not work unless I explicitly set the ItemsSource in code as follows:</p> <pre><code>CategoriesListBox.ItemsSource = Database.Instance.Categories; </code></pre> <p>I know that I should be able to do this all declaratively, however I have tried many different ways of setting the ItemsSource declaratively (in addition to what I have detailed above) and none work.</p> <p>Can someone help me out?</p> <p>Further info: The output windows at runtime shows the following: System.Windows.Data Error: Cannot get 'Categories' value (type 'System.Collections.ObjectModel.ObservableCollection`1[BTT.PinPointTime.Entities.Category]') from 'BTT.PinPointTime.WinPhone.Database' (type 'BTT.PinPointTime.WinPhone.Database'). BindingExpression: Path='Categories' DataItem='BTT.PinPointTime.WinPhone.Database' (HashCode=99825759); target element is 'System.Windows.Controls.ListBox' (Name='CategoriesListBox'); target property is 'ItemsSource' (type 'System.Collections.IEnumerable').. System.MethodAccessException: Attempt to access the method failed: BTT.PinPointTime.WinPhone.Database.get_Categories() at System.Reflection.RuntimeMethodInfo.InternalInvoke(Object obj, BindingFlags invokeAttr</p>
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    1. COwhen you say "the binding does not work", what do you mean? do you get nothing? do you get an exception? are there any messages in the debug output window?
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    2. CO@madd0 I do not get an exception, however the output windows does show some detail - have added it to my post
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