在Windwos Phone 8.1 Silverlight中，如何从列表框中删除选定的项目

Question

I want to delete selected item from listbox in widnows phone I have tryied

myclass is :

    public class mydata
    {
        public int text;

        public int Text
        {
            get;
            set;
        }
    }

And my code which I bind to List is

    for (int i = 0; i < 15; i++)
    {
        lstd.Add(new mydata() { Text = i });
    }
    txt.ItemsSource = lstd;

I have write this code on selectionchanged event of listbox

txt.Items.Remove(txt.SelectedItem);

but it give an error "Operation not supported on read-only collection."

I have also try this one

 var item = lb.SelectedItem as mydata;
            lstd.Remove(item);
            txt.ItemsSource = lstd;
            txt.UpdateLayout();

Item is removed from lstd but can not update layout of listbox;

I do not want to write this line after removing item from Listbox

txt.ItemsSource = null;

Please help me to sort out this.

Thanx in advance

Answer 1

如果listed对象的类是List<mydata> ，则将其更改为ObservableCollection<mydata> ，因此将通知列表框lstd更改。