How to populate data in One combo box at selectChanged event of other Combo in Silverlight
<p>I have my Application in Silverlightwith c#.net(VS2010). I have 2 ComboBoxes,Country,State. The State Combo box should be populated when the Country combo SelectChanged event is Fired.Like depending on the Country the States should be populated. My Database Structure is this.</p>

<p>CountryMaster(CountryId,CountryName)
StateMaster(StateId,Name,CountryID)
This is my Code in Service.svc.cs File</p>

<pre><code>public class GetState
            {
                public string StateName { get; set; }
            }

            [OperationContract]
            public List&lt;GetState&gt; GetStateRecord()
            {
                using (Entities context = new Entities())
                {
                    return (from c in context.StateMasters 
                            select new GetState 
                            {
                                StateName = c.StateName,
                            }).ToList&lt;GetState&gt;();
                }
        } 
</code></pre>

<p>This is my Code of Form.xaml.cs</p>

<pre><code> private void cboCountry_SelectionChanged(object sender, SelectionChangedEventArgs e)


            {
            var client =new ServiceReference1.AlumniServiceClient();
            client.GetStateRecordCompleted +=(s,ea)=&gt;
            {
                cboState.ItemsSource=ea.Result.Select(b =&gt;b.StateName).ToList();;
            };
            client.GetStateRecordAsync();
        }
</code></pre>

<p>How can i get the States??</p>
