こんにちは私はデータグリッド(以下のxaml)内のコードビハインドにあるエキスパンダーにアクセスしたいのですが、plsは解決策を教えてくれます、事前に感謝します
私のxamlコードは次のとおりです。
<dg:DataGrid Margin="0,14,0,0" Grid.Row="1" BorderThickness="0" PreviewMouseLeftButtonDown="mouse_Downs" MouseDoubleClick="CustomDataGrid_MouseDoubleClick" RowEditEnding="CustomDataGrid_RowEditEnding" Grid.RowSpan="6" AlternationCount="2" SelectionMode="Single" SelectionUnit="FullRow" x:Name="CustomDataGrid" CanUserResizeColumns="False" AutoGenerateColumns="False" SelectionChanged="CustomDataGrid_SelectionChanged" ColumnHeaderStyle="{StaticResource columnHeaderStyle}" CanUserAddRows="False" CanUserDeleteRows="False" IsReadOnly="False" RowStyle="{StaticResource DataGridRowStyle}" GridLinesVisibility="None" HeadersVisibility="Column" CanUserSortColumns="False" VerticalScrollBarVisibility="Auto" HorizontalScrollBarVisibility="Auto">
<dg:DataGrid.GroupStyle>
<GroupStyle>
<GroupStyle.HeaderTemplate>
<DataTemplate>
<StackPanel Orientation="Horizontal">
<TextBlock Text="{Binding Path=Name}" FontFamily="Calibri" Foreground="#FF055B72" FontWeight="Bold" FontSize="11"/>
</StackPanel>
</DataTemplate>
</GroupStyle.HeaderTemplate>
<GroupStyle.ContainerStyle>
<Style TargetType="{x:Type GroupItem}">
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type GroupItem}">
<Expander Style="{StaticResource ExpanderStyle}" x:Name="RowExpand" IsExpanded="True" Cursor="Hand" >
<!--<Expander.Background>
<LinearGradientBrush EndPoint="0.5,1" StartPoint="0.5,0">
<GradientStop Color="#FFC7C7C7" Offset="1"/>
<GradientStop Color="#FFEAE9E9"/>
<GradientStop Color="#FFEBE8E8" Offset="0.37"/>
</LinearGradientBrush>
</Expander.Background>-->
<Expander.Header>
<StackPanel Orientation="Horizontal">
<TextBlock x:Name="txtGroupHeader" Text="{Binding Path=Name}" FontFamily="Calibri" Foreground="#FF47494F" FontWeight="Bold" FontSize="14"/>
<!--<Button Width="90" Height="25" Content="Sample"/>-->
</StackPanel>
</Expander.Header>
<ItemsPresenter Margin="7,5,7,9"/>
</Expander>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
</GroupStyle.ContainerStyle>
</GroupStyle>
</dg:DataGrid.GroupStyle>