update demo

src/Shared/HandyControlDemo_Shared/UserControl/Main/LeftMainContent.xaml

@@ -44,7 +44,7 @@
                             <ColumnDefinition/>
                             <ColumnDefinition Width="Auto"/>
                         </Grid.ColumnDefinitions>
-                        <hc:SearchBar SearchStarted="SearchBar_OnSearchStarted" Style="{StaticResource SearchBarPlus}" hc:InfoElement.Placeholder="{ex:Lang Key={x:Static langs:LangKeys.PlsEnterKey}}" Margin="0,4,4,4" Tag="{Binding ElementName=ListBoxDemo}"/>
+                        <hc:SearchBar ShowClearButton="True" TextChanged="SearchBar_OnTextChanged" SearchStarted="SearchBar_OnSearchStarted" Style="{StaticResource SearchBarPlus}" hc:InfoElement.Placeholder="{ex:Lang Key={x:Static langs:LangKeys.PlsEnterKey}}" Margin="0,4,4,4" Tag="{Binding ElementName=ListBoxDemo}"/>
                         <ToggleButton Tag="{Binding ElementName=ListBoxDemo}" Name="ButtonStyleAscending" Click="ButtonAscending_OnClick" Grid.Row="0" Grid.Column="1" Style="{StaticResource DemoInfoSortButtonStyle}"/>
                         <ListBox Name="ListBoxDemo" Grid.Column="0" Grid.ColumnSpan="2" Grid.Row="1" VirtualizingStackPanel.IsVirtualizing="True" SelectedIndex="{Binding SelectedIndex}" ItemsSource="{Binding DemoItemList}" BorderThickness="0" SelectionMode="Single" Style="{StaticResource ListBoxTransparent}">
                             <ListBox.ItemTemplate>

src/Shared/HandyControlDemo_Shared/UserControl/Main/LeftMainContent.xaml.cs

@@ -2,8 +2,8 @@
 using System.Windows;
 using System.Windows.Controls;
 using System.Windows.Controls.Primitives;
+using HandyControl.Controls;
 using HandyControl.Data;
-using HandyControl.Tools.Extension;
 using HandyControlDemo.Data;
 using HandyControlDemo.ViewModel;
 
@@ -15,6 +15,8 @@ namespace HandyControlDemo.UserControl
     /// </summary>
     public partial class LeftMainContent
     {
+        private string _searchKey;
+
         public LeftMainContent()
         {
             InitializeComponent();
@@ -49,13 +51,55 @@ namespace HandyControlDemo.UserControl
 
         private void SearchBar_OnSearchStarted(object sender, FunctionEventArgs<string> e)
         {
-            if (e.Info == null) return;
-            if (!(sender is FrameworkElement searchBar && searchBar.Tag is ListBox listBox)) return;
-            foreach (DemoItemModel item in listBox.Items)
+            _searchKey = e.Info;
+            if (string.IsNullOrEmpty(_searchKey))
             {
-                var listBoxItem = listBox.ItemContainerGenerator.ContainerFromItem(item) as ListBoxItem;
-                listBoxItem?.Show(item.Name.ToLower().Contains(e.Info.ToLower()) ||
-                                  item.TargetCtlName.Replace("DemoCtl", "").ToLower().Contains(e.Info.ToLower()));
+                foreach (var item in ViewModelLocator.Instance.Main.DemoInfoCurrent.DemoItemList)
+                {
+                    item.IsVisible = true;
+                }
+            }
+            else
+            {
+                var key = _searchKey.ToLower();
+                foreach (var item in ViewModelLocator.Instance.Main.DemoInfoCurrent.DemoItemList)
+                {
+                    if (item.Name.ToLower().Contains(key))
+                    {
+                        item.IsVisible = true;
+                    }
+                    else if(item.TargetCtlName.Replace("DemoCtl", "").ToLower().Contains(key))
+                    {
+                        item.IsVisible = true;
+                    }
+                    else
+                    {
+                        var name = Properties.Langs.LangProvider.GetLang(item.Name);
+                        if (!string.IsNullOrEmpty(name) && name.ToLower().Contains(key))
+                        {
+                            item.IsVisible = true;
+                        }
+                        else
+                        {
+                            item.IsVisible = false;
+                        }
+                    }
+                }
+            }
+        }
+
+        private void SearchBar_OnTextChanged(object sender, TextChangedEventArgs e)
+        {
+            if (e.OriginalSource is SearchBar searchBar)
+            {
+                _searchKey = searchBar.Text;
+                if (string.IsNullOrEmpty(_searchKey))
+                {
+                    foreach (var item in ViewModelLocator.Instance.Main.DemoInfoCurrent.DemoItemList)
+                    {
+                        item.IsVisible = true;
+                    }
+                }
             }
         }
     }