How to remove all ListBox items?

Question

Hi, I created two RadioButton (Weight and Height). I will do switch between the two categories. But the they share the same ListBox Controllers (listBox1 and listBox2).

Is there any good method to clear all the ListBox items simpler? I didn't find the removeAll() for ListBox. I don't like my complex multi-lines style which I posted here.

private void Weight_Click(object sender, RoutedEventArgs e)
    {
        // switch between the radioButton "Weith" and "Height"
        // Clear all the items first
        listBox1.Items.Remove("foot"); 
        listBox1.Items.Remove("inch");
        listBox1.Items.Remove("meter");
        listBox2.Items.Remove("foot");
        listBox2.Items.Remove("inch");
        listBox2.Items.Remove("meter");

        // Add source units items for listBox1
        listBox1.Items.Add("kilogram");
        listBox1.Items.Add("pound");

        // Add target units items for listBox2
        listBox2.Items.Add("kilogram");
        listBox2.Items.Add("pound");
    }

    private void Height_Click(object sender, RoutedEventArgs e)
    {
        // switch between the radioButton "Weith" and "Height"
        // Clear all the items first
        listBox1.Items.Remove("kilogram");
        listBox1.Items.Remove("pound");
        listBox2.Items.Remove("kilogram");
        listBox2.Items.Remove("pound");

        // Add source units items for listBox1
        listBox1.Items.Add("foot");
        listBox1.Items.Add("inch");
        listBox1.Items.Add("meter");

        // Add target units items for listBox2
        listBox2.Items.Add("foot");
        listBox2.Items.Add("inch");
        listBox2.Items.Add("meter");
    }

Answer 1

ins't the same as the Winform and Webform way?

listBox1.Items.Clear();

Answer 2

You should be able to use the Clear() method.

Answer 3

while(listBox1.Items.Count > 0) {listBox1.Items.Remove(0); }

Answer 4

I think it would be better to actually bind your listBoxes to a datasource, since it looks like you are adding the same elements to each listbox. A simple example would be something like this:

    private List<String> _weight = new List<string>() { "kilogram", "pound" };
    private List<String> _height = new List<string>() { "foot", "inch", "meter" };

    public Window1()
    {            
        InitializeComponent();
    }        

    private void Weight_Click(object sender, RoutedEventArgs e)
    {
        listBox1.ItemsSource = _weight;
        listBox2.ItemsSource = _weight;
    }

    private void Height_Click(object sender, RoutedEventArgs e)
    {
        listBox1.ItemsSource = _height;
        listBox2.ItemsSource = _height;
    }