1. ComboBox Margin="-16,3,0,5" Grid.Row="1" Grid.Column="2" Grid.ColumnSpan="2" Name="cboxLocationKeyword" 
  2.           ItemsSource="{Binding LocationSource,Mode=OneWay}"    用来绑定数据源  
  3.           SelectedValuePath="ID"              绑定选中项显示名称对应的选项值  
  4.           DisplayMemberPath="Info"        绑定选中项的显示名称  
  5.           SelectedItem="{Binding SelectLocation}"