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<code>DataGridColumns</code> does not lies in same visual tree as that of <code>DataGrid</code>, so it doesn't inherit <code>DataContext</code> from its parent. That's why you are not able to bind it using simple binding syntax. However, there are many workarounds to achieve that. I'll list two of them here: First take advantage of <code>Freezable</code> class. Magic of Freezable objects is that it can inherit the DataContext even when they’re not in the visual or logical tree. You can read more about here <a href="http://www.thomaslevesque.com/2011/03/21/wpf-how-to-bind-to-data-when-the-datacontext-is-not-inherited/" rel="nofollow">Bind Data when DataContext is not inherited</a>. Add this class in your project: <pre><code>public class BindingProxy : Freezable { #region Overrides of Freezable protected override Freezable CreateInstanceCore() { return new BindingProxy(); } #endregion public object Data { get { return (object)GetValue(DataProperty); } set { SetValue(DataProperty, value); } } public static readonly DependencyProperty DataProperty = DependencyProperty.Register("Data", typeof(object), typeof(BindingProxy), new UIPropertyMetadata(null)); } </code></pre> XAML usage: <pre><code><DataGrid> <DataGrid.Resources> <local:BindingProxy x:Key="proxy" Data="{Binding}" /> </DataGrid.Resources> <DataGrid.Columns> <DataGridComboBoxColumn ItemsSource="{Binding Source={StaticResource proxy}}"/> </DataGrid.Columns> </DataGrid> </code></pre> <hr> Second, if you are using WPF 4.0, you can take adavantage of <a href="http://msdn.microsoft.com/en-us/library/ee795380%28v=vs.110%29.aspx" rel="nofollow">x:Reference</a> which allows you to bind to element name even if it does not exist in Visual tree. Create TextBlock whose Visibility will be Collapsed and set its DataContext to personsList. <pre><code><TextBlock Visibility="Collapsed" x:Name="txt"/> </code></pre> and in code behind <pre><code>txt.DataContext = personList; </code></pre> Now you can bind in DataGrid like this: <pre><code><TextBlock Visibility="Collapsed" x:Name="txt"/> <DataGrid> <DataGrid.Columns> <DataGridComboBoxColumn ItemsSource="{Binding Source={x:Reference txt}}"/> </DataGrid.Columns> </DataGrid> </code></pre>
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Querying!

Guidance

A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.