WPF中ComboBox绑定数据库自动读取产生数据

前台端
<ComboBox HorizontalAlignment="Left" Margin="410,113,0,0" VerticalAlignment="Top" Width=""Name="cmb_SSBM" DisplayMemberPath="NAME" SelectedValuePath="CODE" SelectedIndex="-1" / >

后台代码段
WJKCDataContext wjkc = new WJKCDataContext();
cmb_SSBM.ItemsSource = wjkc.BMDA.ToList();
wjkc.Dispose();