如何访问模板生成的元素WPF

Question

I want to get access to TextBox named NameTextBox from my code below (element generated by template) in my xaml.cs file. Especially I want to get Text property. I want this property because want to identify the group after generation.

<DataGrid x:Name="PersonDataGrid">
            <DataGrid.GroupStyle>
                <GroupStyle>
                    <GroupStyle.ContainerStyle>
                        <Style TargetType="{x:Type GroupItem}">
                            <Setter Property="Template">
                                <Setter.Value>
                                    <ControlTemplate TargetType="{x:Type GroupItem}">
                                        <Expander IsExpanded="False">
                                            <Expander.Header>
                                                <StackPanel Orientation="Horizontal">
                                                    <CheckBox x:Name="SelectGroupCheckBox" Checked="SelectGroupCheckBox_Checked"/>
                                                    <TextBlock x:Name="NameTextBox" Text="{Binding Name}"/>
                                                </StackPanel>
                                            </Expander.Header>
                                            <Expander.Content>
                                                <ItemsPresenter/>
                                            </Expander.Content>
                                        </Expander>
                                    </ControlTemplate>
                                </Setter.Value>
                            </Setter>
                        </Style>
                    </GroupStyle.ContainerStyle>
                </GroupStyle>

Or If you guys have other idea how to identify specific generated group. After generation it looks like this . I want it because i want to if i check the group header checkbox has checked children checkboxes.

Answer 1

In your xaml.cs file, you just need to use:

NameTextBox.Text

But it seem's that you are using MVVM mode, in the ViewModel you just need to use the variable that you are binding:

Name

Answer 2

I change CheckBox code

<CheckBox x:Name="SelectGroupCheckBox" 
              Content="{Binding Name}"
              Checked="SelectGroupCheckBox_Checked"
              Unchecked="SelectGroupCheckBox_Unchecked"/>

And in code behind

private void SelectGroupCheckBox_Unchecked(object sender, RoutedEventArgs e)
{
            CheckBox checkBox = sender as CheckBox;
            checkBox.Content.ToString();
}