Hi everyone,

I have some XAML

<ItemsControl Name="mItemsControl">
    <ItemsControl.ItemTemplate>
        <DataTemplate>
            <TextBox Text="{Binding Mode=OneWay}" KeyUp="TextBox_KeyUp"/>
        </DataTemplate>
    </ItemsControl.ItemTemplate>
</ItemsControl>

that's bound to a simple ObservableCollection

private ObservableCollection<string> mCollection = new ObservableCollection<string>();

public MainWindow()
{
    InitializeComponent();

    this.mCollection.Add("Test1");
    this.mCollection.Add("Test2");
    this.mItemsControl.ItemsSource = this.mCollection;
}

Upon hitting the enter key in the last TextBox, I want another TextBox to appear. I have code that does it, but there's a gap:

private void TextBox_KeyUp(object sender, KeyEventArgs e)
{
    if (e.Key != Key.Enter)
    {
        return;
    }

    TextBox textbox = (TextBox)sender;

    if (IsTextBoxTheLastOneInTheTemplate(textbox))
    {
        this.mCollection.Add("A new textbox appears!");
    }
}

The function IsTextBoxTheLastOneInTheTemplate() is something that I need, but can't figure out how to write. How would I go about writing it?

I've considered using ItemsControl.ItemContainerGenerator, but can't put all the pieces together.

Thanks!

-Mike