Change combo box item list depending on the Textbox Text

Question

I have two columns in my grid:

Name(Textbox) ---- ParentList(combobox).

A ----------------------- It sh

Answer 1

That's easy to achieve if you slightly adapt your data type class... I've had to guess at the type of your ParentList because you didn't show it:

private List allItems = GetAllItems();

public ObservableCollection ParentList
{
    get { return parentList; }
    set
    {
        parentList = value;
        NotifyPropertyChanged("ParentList");
    }
}

public string Name
{
    get { return name; }
    set
    {
        name = value;
        NotifyPropertyChanged("Name");
        ParentList = new ObservableCollection(allItems.Where(i => IsFiltered(i)));
    }
}

private bool IsFiltered(string item)
{
    // implement your filter condition here
    return item.StartsWith("A");
}

So the basic idea is that you hold a private collection of all the possible values... this remains unchanged. Each time the Name property is changed, we create a new ParentList dependant on some filtering condition in the IsFiltered method.