Combox first row not selectable

问题

How to make first row of combobox not-selectable? (https://docs.microsoft.com/en-us/uwp/api/Windows.UI.Xaml.Controls.ComboBox?view=winrt-19041)

回答1:

Combox first row not selectable

You could detect DropDownOpened event and find the fist item with ContainerFromIndex then disable it like the following. Because Combobox dropdown is lazy load, so we need add the task delay in DropDownOpened event.

private async void MyCb_DropDownOpened(object sender, object e)
{
    await Task.Delay(100);
    var item = MyCb.ContainerFromIndex(0) as ComboBoxItem;
    if (item != null)
    {
        item.IsEnabled = false;
    }  
}

来源：https://stackoverflow.com/questions/62533192/combox-first-row-not-selectable