WPF GroupStyle错误

Question

我在GroupStyle中有一个DataGrid，如下所示：

<DataGrid x:Name="CompassLogDataGrid"
    ItemsSource="{Binding Source={StaticResource Compasscollection}, IsAsync=True,                 Mode=OneTime}"
    Height="auto"
    AutoGenerateColumns="False"
    Style="{DynamicResource ResourceKey=Log4NetDataGridStyle}">

      <DataGrid.GroupStyle>
          <GroupStyle ContainerStyle="{StaticResource GroupHeaderStyle}" />
      </DataGrid.GroupStyle>
      ...
</DataGrid>

和GroupStyle：

    <Style x:Key="GroupHeaderStyle"
       TargetType="{x:Type GroupItem}">

    <Setter Property="OverridesDefaultStyle"
            Value="False" />

    <Setter Property="Margin"
            Value="0,0,0,5" />
    <Setter Property="Template">
        <Setter.Value>
            <ControlTemplate TargetType="{x:Type GroupItem}">
                <Expander IsExpanded="False"
                          Background="#FF112255"
                          BorderBrush="#FF002255"
                          Foreground="Black"
                          BorderThickness="1,1,1,5">
                    <Expander.Header>
                        <DockPanel>
                            <TextBlock FontWeight="Bold"
                                       Foreground="White"
                                       Text="{Binding Path=Name}"
                                       Margin="5,0,0,0"
                                       Width="100" />
                            <TextBlock FontWeight="Bold"
                                       Foreground="White"
                                       Text="{Binding Path=ItemCount}" />
                        </DockPanel>
                    </Expander.Header>

                    <Expander.Content>
                        <ItemsPresenter />
                    </Expander.Content>
                </Expander>
            </ControlTemplate>
        </Setter.Value>
    </Setter>
</Style>

此代码生成以下Error：

  

System.Windows.Data错误：4：无法找到带引用的绑定源＆＃39; RelativeSource FindAncestor，AncestorType =＆＃39; System.Windows.Controls.DataGrid＆＃39;，AncestorLevel =＆＃39; 1＆ ＃39;＆＃39 ;. BindingExpression：路径= AreRowDetailsFrozen;的DataItem = NULL;目标元素是＆＃39; DataGridDetailsPresenter＆＃39; （名称=＆＃39;＆＃39）;目标属性是'SelectiveScrollingOrientation＆＃39; （键入＆＃39; SelectiveScrollingOrientation＆＃39;）       System.Windows.Data错误：4：找不到用于引用绑定的源＆＃39; RelativeSource FindAncestor，AncestorType =＆＃39; System.Windows.Controls.DataGrid＆＃39;，AncestorLevel =＆＃39; 1＆＃39; ＆＃39 ;. BindingExpression：路径= HeadersVisibility;的DataItem = NULL;目标元素是＆＃39; DataGridRowHeader＆＃39; （名称=＆＃39;＆＃39）;目标财产是“可见性”＆＃39; （键入＆＃39;可见性＆＃39;）

我该如何解决这个问题？