HandyControl/src/Shared/HandyControlDemo_Shared/ViewModel/Controls/AutoCompleteTextBoxDemoViewModel.cs

using System.Collections.Generic;
using GalaSoft.MvvmLight;
using HandyControl.Collections;
using HandyControlDemo.Data;
using HandyControlDemo.Service;

namespace HandyControlDemo.ViewModel
{
    public class AutoCompleteTextBoxDemoViewModel : ViewModelBase
    {
        private string _searchText;

        public string SearchText
        {
            get => _searchText;
#if NET40
            set
            {
                Set(nameof(SearchText), ref _searchText, value);
                FilterItems(value);
            }
#else
            set
            {
                Set(ref _searchText, value);
                FilterItems(value);
            }
#endif
        }

        public ManualObservableCollection<DemoDataModel> Items { get; set; } = new();

        private readonly List<DemoDataModel> _dataList;

        public AutoCompleteTextBoxDemoViewModel(DataService dataService)
        {
            _dataList = dataService.GetDemoDataList(10);
        }

        private void FilterItems(string key)
        {
            Items.CanNotify = false;

            Items.Clear();

            foreach (var data in _dataList)
            {
                if (data.Name.Contains(key))
                {
                    Items.Add(data);
                }
            }

            Items.CanNotify = true;
        }
    }
}