如何从行详细信息模板获取更新

Question

我希望能够编辑行dtetailsTemplate控件中显示的数据。有可能吗？

我在RowDetailsTemplate gridview中有一个网格视图，我试图更新它，但无法获得更改。它总是返回值不变。

数据网格：

<HDataGridEx x:Name="dgrd1" Grid.Row="1"  ItemsSource="{Binding MEDICALRECORDCOPYPRINTING_HMEINFO_LIST}" HeadersVisibility="All" IsShowCheckHeader="False" AutoGenerateColumns="False"
                     IsReadOnly="True" SelectionMode="Single" SelectionUnit="FullRow" ShowRowIndex="True" CanUserSelectRowHeader="False"
                     SelectedItem="{Binding MEDICALRECORDCOPYPRINTING_HMEINFO_ITEM}" GridLinesVisibility="None" RowDetailsVisibilityMode="Collapsed" RowHeight="35"
                     AlternatingRowBackground="{StaticResource AlternatingRowBackgroundBrush}" >

数据网格中的行详细信息模板：

<HDataGridEx.RowDetailsTemplate>
    <DataTemplate>
        <Border x:Name="grdPrnt" Background="{StaticResource RowExpanderBackground}" Margin="3"
                            DataContext="{Binding RelativeSource={RelativeSource Mode=FindAncestor, AncestorType=HDataGridEx}, Path=DataContext}" >
            <HDataGridEx x:Name="dgrd2" GridLinesVisibility="All" IsReadOnly="False"
                                             HeadersVisibility="Column" HasRowHeaderStatus="False"
                                             ItemsSource="{Binding MEDICALRECORDCOPYPRINTING_HMEINFO_LIST_SECOND , Mode=TwoWay}"
                                             CanUserSelectRowHeader="False"
                                             SelectionUnit="FullRow"
                                             Margin="5">
            </HDataGridEx>
        </Border>
    </DataTemplate>
</HDataGridEx.RowDetailsTemplate>

save命令：

<HButton Content="{LanguageResource Source=MS, Path=Alias.MSD_012493, Description='Modification'}" Style="{StaticResource CommonButtonSaveStyle}"  DockPanel.Dock="Right" Margin="0,0,5,0" PermissionManager.ButtonPermission="Write" Command="{Binding SaveCommand}" CommandParameter="{Binding ElementName=dgrd2}" Visibility="{Binding SAVEVISIBILITY}" />

并且以下条件中的值始终为真：

if (this.MEDICALRECORDCOPYPRINTING_HMEINFO_LIST_SECOND.GetChanges().Count <= 0)
{
    MsgBox.Display("MSMCN_001619", MessageType.MSG_TYPE_INFORMATION, Owner: this.OwnerWindow, TimeSpan: 1000);
    // NO DATA CHANGE
    return;
}