Wpf question about programmatically moving up the control tree

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There has got to be a better way than this:

var tabItem = (TabItem)((ContentControl)((UserControl)((Grid)((TextBox)sender).Parent).Parent).Parent).Parent;

The idea here is that I need to get the TabItem in which the TextBox resides, which is in a grid, which in a user control, which is in the TabItem's ContentControl.

What I have tried:

As the "problem" states (but I need 30 characters here), this:

var tabItem = (TabItem)((ContentControl)((UserControl)((Grid)((TextBox)sender).Parent).Parent).Parent).Parent;

is gross and dependent on the control tree structure.

Posted 26-Mar-17 9:57am

Marc Clifton

Updated 26-Mar-17 14:56pm

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Marco Bertschi 27-Mar-17 5:39am

"I need 30 characters here"
Never did myself.

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Graeme_Grant · Answer 1 · 2017-03-26T14:56:00

System.Windows.Media namespace has the VisualTreeHelper class that you can use to traverse the dependancy tree using GetChild and GetParent methods.

So you could do something like this (untested):

C#

private FrameworkElement GetParent(FrameworkElement item, Type targetType)
{
    var parent = VisualTreeHelper.GetParent(item);
    while (parent.GetType() != targetType)
    {
        parent = VisualTreeHelper.GetParent(parent);
    }
    return parent;
}

Then to use would be (untested):

C#

var tabItem = GetParent(sender as FrameworkElement, TabItem);