将函数绑定到动态创建的元素

Question

Just a quick question. I am working on WPF Project (using c#).

So I Have a function, which on click of a radnom listview item shows it's text in textbox.

private void show_it(object sender, MouseButtonEventArgs e)
    {
        ListViewItem item = (ListViewItem)sender;
        textBox1.Text = item.Content.ToString();

    }

Now, If I create another Listview item in c#, I can't find a way to bind this same function to that newly created element.

        ListViewItem new_i=new ListViewItem();
        new_i.Content = "test";
        /* Tried; not working:
        new_i.SetValue(OnMouseLeftButtonUp, "show_it");
         */
        listView1.Items.Add(new_i);

How can I implement this? Many thanks in advance.

Answer 1

In XAML register a handler:

<ListView SelectionChanged="ListView_SelectionChanged"> 

In code behind:

private void ListView_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
  ListView control = (ListView)sender;
  var item = (ListViewItem)control.SelectedItem;
  textBox1.Text = item.Content.ToString();
}

But as HighCore said, DataBinding is the much better solution

Answer 2

Routed event handlers in WPF are programmatically assigned the same way as other .Net events.

ListViewItem new_i=new ListViewItem();
new_i.Content = "test";
new_i.Click += show_it;

listView1.Items.Add(new_i);

When you have time, I would recommend that you read up on data binding in WPF.