public async void AddItem (View view)
        {
            if (client == null || string.IsNullOrWhiteSpace (textNewToDo.Text)) {
                return;
            }

            // Create a new item
            var item = new ToDoItem {
                Text = textNewToDo.Text,
                Complete = false
            };

            try {
                await toDoTable.InsertAsync(item); // insert the new item into the local database
                await SyncAsync(); // send changes to the mobile service

                if (!item.Complete) {
                    adapter.Add (item);
                }
            } catch (Exception e) {
                CreateAndShowDialog (e, "Error");
            }

            textNewToDo.Text = "";
        }
 public ToDoItemWrapper(ToDoItem item)
 {
     ToDoItem = item;
 }
        public async Task CheckItem (ToDoItem item)
        {
            if (client == null) {
                return;
            }

            // Set the item as completed and update it in the table
            item.Complete = true;
            try {
                await toDoTable.UpdateAsync(item); // update the new item in the local database
                await SyncAsync(); // send changes to the mobile service

                if (item.Complete)
                    adapter.Remove (item);

            } catch (Exception e) {
                CreateAndShowDialog (e, "Error");
            }
        }