Loop through Groupbox in TabControl

Question

I have a WPF with contain tab control (page1, page2, and page3).

In tab control page 2, I do have 3 groupbox (groupbox_A, groupbox_B, and groupbox_C), and each of the groupbox contain 3 textbox.

May I know what is the C# code to loop through all the textbox and clear the content.

Initial code was using the code as mention (textbox1.clear()). With considering near to 60 textbox present, it will be tough to maintain the code. — user6648485, Jul 29 '16 at 00:15

score 0 · Accepted Answer · edited May 23 '17 at 12:32

0

This function will return all the textboxes within the tab control.

public static IEnumerable<T> FindVisualChildren<T>(DependencyObject depObj) where T : DependencyObject
{
    if (depObj != null)
    {
        for (int i = 0; i < VisualTreeHelper.GetChildrenCount(depObj); i++)
        {
            DependencyObject child = VisualTreeHelper.GetChild(depObj, i);
            if (child != null && child is T)
            {
                yield return (T)child;
            }

            foreach (T childOfChild in FindVisualChildren<T>(child))
            {
                yield return childOfChild;
            }
        }
    }
}

You can get all text boxes by enumerating like this :

foreach (var textbox in FindVisualChildren<TextBox>(window))
{
    // do something with tb here
}

Source : Find all controls in WPF Window by type

edited May 23 '17 at 12:32

Community

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answered Jul 28 '16 at 08:27

ViVi

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Thanks for sharing the code. It seem like I need to ensure the tab page 2 was activated so that the textbox store within page 2 will been clear. – user6648485 Jul 29 '16 at 00:19
I do have stackpanel_1 with orientation set to vertical. In the stackpanel_1, it consist of stackpanel_A, B, C, & D, with orientation set to horizontal and contain a few button. Some how code like foreach (stackepanel stkpnl in stackpanel_1.Children) was work. – user6648485 Jul 29 '16 at 00:27
The same thing happens here too. See `for (int i = 0; i < VisualTreeHelper.GetChildrenCount(depObj); i++) {` – ViVi Jul 29 '16 at 01:26
Glad to have helped you. :-) – ViVi Jul 29 '16 at 01:26

score 0 · Answer 2 · answered Jul 28 '16 at 08:32

This doesn`t look like a good approach.. find another logic to clear your texts.. but if you just want to know how it would work...

the easiest way:

IEnumerable<myType> collection = control.Children.OfType<myType>();

(control is the root element of the window and myType would be groubBox in your case)

The microsoft way to get through all elements Link:

 // Enumerate all the descendants of the visual object.
 static public void EnumVisual(Visual myVisual)
 {
     for (int i = 0; i < VisualTreeHelper.GetChildrenCount(myVisual); i++)
     {
        // Retrieve child visual at specified index value.
        Visual childVisual = (Visual)VisualTreeHelper.GetChild(myVisual, i);

        // Do processing of the child visual object.

        // Enumerate children of the child visual object.
        EnumVisual(childVisual);
    }
 }

could you elaborate a bit more on the easiest way and Microsoft way as I still try to pick up the C# skill and apply to my job. (I use to practice in VB and just 2 week ago, I started with C#.) — user6648485, Jul 29 '16 at 00:29

Loop through Groupbox in TabControl

2 Answers2