In my previous post, I showed how to instantiate LINQ to SQL DataContext using ObjectDataProvider in WPF. With ADO.NET Entities you can do something similar:

 <Grid.Resources>
            <ObjectDataProvider x:Key="customers" 
                ObjectType="{x:Type local:NorthwindEntities}" MethodName="get_Customers">
            </ObjectDataProvider>
            <ObjectDataProvider x:Key="orders" 
                ObjectType="{x:Type local:NorthwindEntities}" MethodName="get_Orders">
            </ObjectDataProvider>
        </Grid.Resources>

The tricky part is to call desired property getter: MethodName="get_Customers"! :)

Now we can bind our first RadGridView completely codeless to Customers ObjectDataProvider:

<
telerik:RadGridView Grid.Row="1"Margin="5"Name="RadGridView1"IsReadOnly="True"telerik:Theming.Theme="Vista"
  
ItemsSource="{BindingSource={StaticResource customers}}">
</
telerik:RadGridView>

and load Orders programmatically in the second RadGridView for select Customer:

void RadGridView1_SelectionChanged(object sender, Telerik.Windows.Controls.SelectionChangeEventArgs e)
{
    ObjectQuery<Orders> orders = (ObjectQuery<Orders>)((ObjectDataProvider)Grid.FindResource("orders")).Data;
    string customerID = ((Customers)RadGridView1.SelectedItem).CustomerID;
    RadGridView2.ItemsSource = orders.Where<Orders>(o => o.CustomerID == customerID);
}

Untitled

Enjoy!

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About the Author

Vladimir Enchev

is Director of Engineering, Native Mobile UI & Frameworks

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