如何删除 ListView android xamarin 中的选定项目

Question

如何删除 ListView 中的选定项目，ListView 的项目来自 SQLite.net 数据库 下面是我的代码，但是当我删除所有行并将新项目添加到数据库时，我无法从列表视图中删除一行

private void popmenu(object sender, AdapterView.ItemClickEventArgs e)
    {
        var menu = new PopupMenu(this, listnames.GetChildAt(e.Position));
        menu.Inflate(Resource.Layout.popup_menu);
        menu.MenuItemClick += (s, A) =>
        {
            switch (A.Item.ItemId)
            {
                case Resource.Id.pop_button1:
                    // update stuff
                    string dpPath = Path.Combine(System.Environment.GetFolderPath(System.Environment.SpecialFolder.Personal), "user.db3");
                    db = new SQLiteConnection(dpPath);
                    var data = db.Table<LoginTable>();
                    // Toast.MakeText(this, "row:" + (e.Position+1), ToastLength.Short).Show();
                    int ww =(e.Position + 1);
                    var data1 = data.Where(x => x.id == ww);
                    foreach (var item in data1)
                    {
                        db.Delete(item);

                        Toast.MakeText(this, "Delete Successfully", ToastLength.Short).Show();
                    }

                        break;

            }
        };

Answer 1

您可以在适配器的代码中添加删除项目功能，例如：

public class MainAdapter : BaseAdapter<string>
{

   private List<string> items = new List<string>();
   private Activity context;

   public MainAdapter(Activity context, List<string> items) : base()
   {
         this.context = context;
         this.items = items;
   }

   ...

   public void RemoveItemAt(int position)
   {
      items.RemoveAt(position);
   }

}

然后在item点击事件中：

private void MListView_ItemClick(object sender, AdapterView.ItemClickEventArgs e)
{
    adapter.RemoveItemAt(e.Position);
    adapter.NotifyDataSetChanged();
}