<StackPanel x:Name="SPMatchedVehicleQsjdc"    
 DataContext="{Binding  RealtimeMonitorCollectionViewSource.View.CurrentItem, ConverterParameter=MatchedVehicleQsjdc, Converter={StaticResource AlarmDetailsConverter}, UpdateSourceTrigger=PropertyChanged}">
  <DockPanel LastChildFill="False" Margin="0,2">
 <TextBlock TextWrapping="Wrap" Text="号牌号码"/>
  <TextBlock TextWrapping="Wrap" Text="{Binding HPHM}" DockPanel.Dock="Right"/>
 </DockPanel>
  </StackPanel>以下是编译时在调试输出窗口里显示的“警告”   这些警告是什么意思???????????
System.Windows.Data Error: 40 : BindingExpression path error: 'RealtimeMonitorCollectionViewSource' property not found on 'object' ''DataRowView' (HashCode=13078478)'. BindingExpression:Path=RealtimeMonitorCollectionViewSource.View.CurrentItem; DataItem='DataRowView' (HashCode=13078478); target element is 'StackPanel' (Name='SPMatchedVehicleQsjdc'); target property is 'DataContext' (type 'Object')