add ignoreTextChanged

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

@@ -0,0 +1,57 @@
+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;
+        }
+    }
+}