TextBox inside Listview - getting ListViewItem on TextBox TextChanged

Question

I have a ListView that displays a few TextBoxes. For each TextBox, I am catching a SelectionChanged event.

My XAML file looks something like this:

<ListView>
    <GridView>
        ...
        <DataTemplate>
            <TextBox SelectionChanged="Box_SelectionChanged" />
        </DataTemplate>
        ...
    </GridView>
</ListView>

And my Xaml CS file looks like this:

private void Box_SelectionChanged(object sender, TextChangedEventArgs e) {}

In my Box_SelectionChanged function, I would like to get the ListViewItem in which the text box was updated.

How can I do so?

@Bob. - I have tried casting the sender as a TextBox to see if I can get the ListViewItem from that but had no luck — Aamir
– Aamir, Commented Sep 26, 2012 at 19:22
Odd, that walking up the visual tree in the debugger, you couldn't find the ListView — Bob.
– Bob., Commented Sep 26, 2012 at 19:40

kmatyaszek · Accepted Answer · 2012-09-26 19:30:16Z

5

You can try this:

Add this method to your class:

public static T FindVisualParent<T>(UIElement element) where T : UIElement
        {
            UIElement parent = element; while (parent != null)
            {
                T correctlyTyped = parent as T; if (correctlyTyped != null)
                {
                    return correctlyTyped;
                }
                parent = VisualTreeHelper.GetParent(parent) as UIElement;
            } return null;
        }

And in Box_SelectionChanged event handler invoke this method:

        private void Box_SelectionChanged(object sender, RoutedEventArgs e)
        {          
            var tmp = FindVisualParent<ListViewItem>(sender as TextBox);
        }

answered Sep 26, 2012 at 19:30

kmatyaszek

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2 Comments

Aamir Over a year ago

Cool, thanks. Is there a way of getting the parent through a property or method in the sender object or do I have to perform a search on the entire ListView every time?

kmatyaszek Over a year ago

You're welcome. You don't perform search on entire ListView, everytime when you invoke this method you're checking only 7 elements. You can check this in Snoop (snoopwpf.codeplex.com).

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