How to get the Text from TextBlock inside a DataTemplate in code-behind

Question

I have an Accordion Control where I bind values and display them in a DataTemplate. This is what I have in my user control :

<layoutToolkit:Accordion x:Name="MyAccordion">
<layoutToolkit:Accordion.ItemTemplate>
    <DataTemplate >
        <TextBlock x:Name="Header" Text="{Binding Header}"/>
    </DataTemplate>
</layoutToolkit:Accordion.ItemTemplate>
<layoutToolkit:Accordion.ContentTemplate>
    <DataTemplate>
        <StackPanel>
            <StackPanel Orientation="Horizontal">
                <TextBlock x:Name="Content" Text="{Binding Content}" />
            </StackPanel>
            <StackPanel Orientation="Horizontal">
                <Button x:Name="MyMethod" Content="Method" Click="MyMethod"/>
            </StackPanel>
        <StackPanel>
    </DataTemplate>
</layoutToolkit:Accordion.ContentTemplate>

My binding is working, now i want to be able to use the Text from the textblock to apply in a method in code behind, but I want the value to be different depending on which Accordion is open. Is it possible to achieve that ?

This is how my code-behind is :

        public MyUserCOntrol()
    {
        InitializeComponent();
        this.MyAccordion.SelectionMode = AccordionSelectionMode.ZeroOrOne;

        //method to fill the accordion
        this.MyAccordion.ItemsSource = MainWindow._RE.ListActionsParType;
    }

    public void MyMethod(object sender, EventArgs e)
    {
        string TxtBlockContent = ....;
        // so i can use this value in other operations
    }

I want to create a method (here it's myMethode) that I will apply on a button click and that use this value depending on which accordion is open

Answer 1

If you need to get the text of the TextBlock you displayed in the DataTemplate, then you can achieve it by using the below way,

//In the textblock you used in XAML

<TextBlock Loaded="Txt_Loaded">

//In code-behind

private void Txt_Loaded(object sender, RoutedEventArgs e)
{
    var myText = (sender as TextBlock).Text;
}

The above event will be fired whenever the TextBlock is loaded into view. So, you can get the text in the TextBlock as like in the above code.

Answer 2

使用“ BindingContextChanged”事件获取发件人（实际视图，TextBlock）。