New tab in WPF - items.add from buttons vs methods

0

OK, so I have a window called PictureWindow which displays pictures (I've cut out the code not related to making tabs). The TabControl is named "itemsTab". Using a button press, I can make a new tab no problem. But using the same operations inside a called method doesn't work. Using the buttonTab_Click method makes a new tab, the newTab method does not.

The only real difference I can see is due to the sender and RoutedEventArgs objects - how do these effect the operation here? Or is there something else I'm missing?

Thanks in advance.

Edit To make things even stranger, the newTab method does make a new tab, but only if it is called in the PictureWindow constructor method. If I have the following a new tab is made.

        
public PictureWindow(string current)
        {
            InitializeComponent();
            newTab(current);
        }

But if I call the method anywhere else it doesn't work.

public partial class PictureWindow : Window
    {
        public PictureWindow(string current)
        {
            InitializeComponent();
        }

        private void Window_Loaded(object sender, RoutedEventArgs e)
        {
        }

        private void buttonClose_Click(object sender, RoutedEventArgs e)
        {
            this.Close();
        }

        private void buttonTab_Click(object sender, RoutedEventArgs e)
        {
            TabItem newTab = new TabItem();
            newTab.Header = "New Tab!";
            itemsTab.Items.Add(newTab);
        }

        public void newTab(string current)
        {
            TabItem newTab = new TabItem();
            itemsTab.Items.Add(newTab);

        }
    }

---

• Have you tried putting a breakpoint and check that newTab() really gets called? - Blachshma
• Yes, I have. Both get called correctly and execute with the same data. But only one actually makes the new tab. - Irish Yobbo
• Just in case anybody else makes this dumb mistake, I'm posting the solution to the problem. The new Tab item was made and added, but not to a current window. var newWindow = new PictureWindow(fileName); var window = newWindow.getCurrentPictureWindow(); window.newTab(fileName); By using the getCurrentPictureWindow to select the right window, the tab was added successfully. - Irish Yobbo