Listbox item selection programmatically

Question

I have an hamburger Menu with ListBox, When I click on items it is Highlighted and navigated to related page, but when I click on Any link inside the xaml page the hamburger item is not changing even the page is navigated. How to set Listbox item selected and highlighted from code behind.

I am calling the following function from wherever I need to change the Listbox item to my required one

public async static void ChangeSideBarItem()
{
    ADHome objADHome = new ADHome();
    string selected = App.SelectedPage;

    int x = objADHome.SideBarListBox.Items.IndexOf(selected);
    if (!String.IsNullOrEmpty(selected))
    {
        for (int index = 0; index < objADHome.SideBarListBox.Items.Count; index++)
        {
            HamburgerItemClass item = (HamburgerItemClass)objADHome.SideBarListBox.Items[index];

            string item1 = item.Title;
            if (selected == item1)
            {
                objADHome.SideBarListBox.SelectedItem = index;
                break;
            }
        }
    }
}

I am calling the above method by setting the App.SelectedPage from different xaml page(orders Page) here i have a link Dashboard to navigate back to dashboard page, when i click on that the particular dashboard item in listbox(Sidebar) should be highlighted

private void DashboardLink_Click(object sender, RoutedEventArgs e)
{
    App.SelectedPage = "Dashboard";
    ADHome.ChangeSideBarItem();
    this.Frame.Navigate(typeof(DashBoard));
}

But its not selected, when I debug it, shows null in selecteditem

Romasz Romasz · Accepted Answer · 2017-02-14T06:09:34

Generally you can just add your items to ListBox.SelectedItems collection:

private void SelectButton_Click(object sender, RoutedEventArgs e)
{
    // either by adding item from collection:
    myListBox.SelectedItems.Add(CollectionOfItems[1]);

    // or add from list itself:
    myListBox.SelectedItems.Add(myListBox.Items.Last());
}

Listbox item selection programmatically

3 Answers