diff --git a/src/Shared/HandyControlDemo_Shared/UserControl/Controls/TextBoxDemo.xaml b/src/Shared/HandyControlDemo_Shared/UserControl/Controls/TextBoxDemo.xaml
index 080d7fb6..e313be35 100644
--- a/src/Shared/HandyControlDemo_Shared/UserControl/Controls/TextBoxDemo.xaml
+++ b/src/Shared/HandyControlDemo_Shared/UserControl/Controls/TextBoxDemo.xaml
@@ -8,42 +8,123 @@
              DataContext="{Binding InputElementDemo, Source={StaticResource Locator}}">
     <hc:TransitioningContentControl>
         <hc:ScrollViewer IsInertiaEnabled="True">
-            <hc:UniformSpacingPanel Spacing="32" Margin="32" ChildWrapping="Wrap">
+            <hc:UniformSpacingPanel Spacing="32"
+                                    Margin="32"
+                                    ChildWrapping="Wrap">
                 <StackPanel>
-                    <hc:TextBox hc:InfoElement.ShowClearButton="True" Text="{ex:Lang Key={x:Static langs:LangKeys.ContentDemoStr}}"/>
-                    <hc:TextBox Text="{ex:Lang Key={x:Static langs:LangKeys.ContentDemoStr}}" Margin="0,16,0,0" IsEnabled="False"/>
+                    <hc:TextBox hc:InfoElement.ShowClearButton="True"
+                                Text="{ex:Lang Key={x:Static langs:LangKeys.ContentDemoStr}}" />
+                    <hc:TextBox Text="{ex:Lang Key={x:Static langs:LangKeys.ContentDemoStr}}"
+                                Margin="0,16,0,0"
+                                IsEnabled="False" />
 
-                    <hc:TextBox hc:InfoElement.ShowClearButton="True" hc:InfoElement.Title="{ex:Lang Key={x:Static langs:LangKeys.TitleDemoStr1}}" Margin="0,32,0,0" Text="{ex:Lang Key={x:Static langs:LangKeys.ContentDemoStr}}"/>
-                    <hc:TextBox hc:InfoElement.ShowClearButton="True" hc:InfoElement.Title="{ex:Lang Key={x:Static langs:LangKeys.TitleDemoStr1}}" Margin="0,16,0,0" Text="{ex:Lang Key={x:Static langs:LangKeys.ContentDemoStr}}" IsEnabled="False"/>
-                    <hc:TextBox hc:InfoElement.Placeholder="{ex:Lang Key={x:Static langs:LangKeys.PlsEnterEmail}}" hc:InfoElement.Title="{ex:Lang Key={x:Static langs:LangKeys.TitleDemoStr2}}" hc:InfoElement.Necessary="True" Margin="0,16,0,0">
+                    <hc:TextBox hc:InfoElement.ShowClearButton="True"
+                                hc:InfoElement.Title="{ex:Lang Key={x:Static langs:LangKeys.TitleDemoStr1}}"
+                                Margin="0,32,0,0"
+                                Text="{ex:Lang Key={x:Static langs:LangKeys.ContentDemoStr}}" />
+                    <hc:TextBox hc:InfoElement.ShowClearButton="True"
+                                hc:InfoElement.Title="{ex:Lang Key={x:Static langs:LangKeys.TitleDemoStr1}}"
+                                Margin="0,16,0,0"
+                                Text="{ex:Lang Key={x:Static langs:LangKeys.ContentDemoStr}}"
+                                IsEnabled="False" />
+                    <hc:TextBox hc:InfoElement.Placeholder="{ex:Lang Key={x:Static langs:LangKeys.PlsEnterEmail}}"
+                                hc:InfoElement.Title="{ex:Lang Key={x:Static langs:LangKeys.TitleDemoStr2}}"
+                                hc:InfoElement.Necessary="True"
+                                Margin="0,16,0,0">
                         <hc:TextBox.Text>
-                            <Binding Path="Email1" UpdateSourceTrigger="PropertyChanged">
+                            <Binding Path="Email1"
+                                     UpdateSourceTrigger="PropertyChanged">
                                 <Binding.ValidationRules>
-                                    <hc:RegexRule Type="Mail"/>
+                                    <hc:NoBlankTextRule />
+                                    <hc:RegexRule Type="Mail" />
+                                </Binding.ValidationRules>
+                            </Binding>
+                        </hc:TextBox.Text>
+                    </hc:TextBox>
+                    <hc:TextBox Width="380"
+                                hc:InfoElement.TitleWidth="140"
+                                hc:InfoElement.TitlePlacement="Left"
+                                hc:InfoElement.Title="{ex:Lang Key={x:Static langs:LangKeys.TitleDemoStr3}}"
+                                Margin="0,32,0,0"
+                                Text="{ex:Lang Key={x:Static langs:LangKeys.ContentDemoStr}}" />
+                    <hc:TextBox hc:InfoElement.ShowClearButton="True"
+                                Width="380"
+                                hc:InfoElement.TitleWidth="140"
+                                hc:InfoElement.Placeholder="{ex:Lang Key={x:Static langs:LangKeys.PlsEnterContent}}"
+                                hc:InfoElement.TitlePlacement="Left"
+                                hc:InfoElement.Title="{ex:Lang Key={x:Static langs:LangKeys.TitleDemoStr3}}"
+                                hc:InfoElement.Necessary="True"
+                                Margin="0,16,0,0">
+                        <hc:TextBox.Text>
+                            <Binding Path="Text1"
+                                     UpdateSourceTrigger="PropertyChanged">
+                                <Binding.ValidationRules>
+                                    <hc:NoBlankTextRule />
                                 </Binding.ValidationRules>
                             </Binding>
                         </hc:TextBox.Text>
                     </hc:TextBox>
-                    <hc:TextBox Width="380" hc:InfoElement.TitleWidth="140" hc:InfoElement.TitlePlacement="Left" hc:InfoElement.Title="{ex:Lang Key={x:Static langs:LangKeys.TitleDemoStr3}}" Margin="0,32,0,0" Text="{ex:Lang Key={x:Static langs:LangKeys.ContentDemoStr}}"/>
-                    <hc:TextBox hc:InfoElement.ShowClearButton="True" Width="380" hc:InfoElement.TitleWidth="140" hc:InfoElement.Placeholder="{ex:Lang Key={x:Static langs:LangKeys.PlsEnterContent}}" hc:InfoElement.TitlePlacement="Left" hc:InfoElement.Title="{ex:Lang Key={x:Static langs:LangKeys.TitleDemoStr3}}" hc:InfoElement.Necessary="True" Margin="0,16,0,0"/>
                 </StackPanel>
                 <StackPanel>
-                    <hc:TextBox hc:InfoElement.ShowClearButton="True" Text="{ex:Lang Key={x:Static langs:LangKeys.ContentDemoStr}}" Style="{StaticResource TextBoxPlus.Small}"/>
-                    <hc:TextBox Text="{ex:Lang Key={x:Static langs:LangKeys.ContentDemoStr}}" Margin="0,16,0,0" IsEnabled="False" Style="{StaticResource TextBoxPlus.Small}"/>
+                    <hc:TextBox hc:InfoElement.ShowClearButton="True"
+                                Text="{ex:Lang Key={x:Static langs:LangKeys.ContentDemoStr}}"
+                                Style="{StaticResource TextBoxPlus.Small}" />
+                    <hc:TextBox Text="{ex:Lang Key={x:Static langs:LangKeys.ContentDemoStr}}"
+                                Margin="0,16,0,0"
+                                IsEnabled="False"
+                                Style="{StaticResource TextBoxPlus.Small}" />
 
-                    <hc:TextBox hc:InfoElement.ShowClearButton="True" hc:InfoElement.Title="{ex:Lang Key={x:Static langs:LangKeys.TitleDemoStr1}}" Margin="0,32,0,0" Text="{ex:Lang Key={x:Static langs:LangKeys.ContentDemoStr}}" Style="{StaticResource TextBoxPlus.Small}"/>
-                    <hc:TextBox hc:InfoElement.ShowClearButton="True" hc:InfoElement.Title="{ex:Lang Key={x:Static langs:LangKeys.TitleDemoStr1}}" Margin="0,16,0,0" Text="{ex:Lang Key={x:Static langs:LangKeys.ContentDemoStr}}" Style="{StaticResource TextBoxPlus.Small}" IsEnabled="False"/>
-                    <hc:TextBox hc:InfoElement.Placeholder="{ex:Lang Key={x:Static langs:LangKeys.PlsEnterEmail}}" hc:InfoElement.Title="{ex:Lang Key={x:Static langs:LangKeys.TitleDemoStr2}}" hc:InfoElement.Necessary="True" Margin="0,16,0,0" Style="{StaticResource TextBoxPlus.Small}">
+                    <hc:TextBox hc:InfoElement.ShowClearButton="True"
+                                hc:InfoElement.Title="{ex:Lang Key={x:Static langs:LangKeys.TitleDemoStr1}}"
+                                Margin="0,32,0,0"
+                                Text="{ex:Lang Key={x:Static langs:LangKeys.ContentDemoStr}}"
+                                Style="{StaticResource TextBoxPlus.Small}" />
+                    <hc:TextBox hc:InfoElement.ShowClearButton="True"
+                                hc:InfoElement.Title="{ex:Lang Key={x:Static langs:LangKeys.TitleDemoStr1}}"
+                                Margin="0,16,0,0"
+                                Text="{ex:Lang Key={x:Static langs:LangKeys.ContentDemoStr}}"
+                                Style="{StaticResource TextBoxPlus.Small}"
+                                IsEnabled="False" />
+                    <hc:TextBox hc:InfoElement.Placeholder="{ex:Lang Key={x:Static langs:LangKeys.PlsEnterEmail}}"
+                                hc:InfoElement.Title="{ex:Lang Key={x:Static langs:LangKeys.TitleDemoStr2}}"
+                                hc:InfoElement.Necessary="True"
+                                Margin="0,16,0,0"
+                                Style="{StaticResource TextBoxPlus.Small}">
                         <hc:TextBox.Text>
-                            <Binding Path="Email2" UpdateSourceTrigger="PropertyChanged">
+                            <Binding Path="Email2"
+                                     UpdateSourceTrigger="PropertyChanged">
                                 <Binding.ValidationRules>
-                                    <hc:RegexRule Type="Mail"/>
+                                    <hc:NoBlankTextRule />
+                                    <hc:RegexRule Type="Mail" />
+                                </Binding.ValidationRules>
+                            </Binding>
+                        </hc:TextBox.Text>
+                    </hc:TextBox>
+                    <hc:TextBox Width="380"
+                                hc:InfoElement.TitleWidth="140"
+                                hc:InfoElement.TitlePlacement="Left"
+                                hc:InfoElement.Title="{ex:Lang Key={x:Static langs:LangKeys.TitleDemoStr3}}"
+                                Margin="0,32,0,0"
+                                Text="{ex:Lang Key={x:Static langs:LangKeys.ContentDemoStr}}"
+                                Style="{StaticResource TextBoxPlus.Small}" />
+                    <hc:TextBox hc:InfoElement.ShowClearButton="True"
+                                Width="380"
+                                hc:InfoElement.TitleWidth="140"
+                                hc:InfoElement.Placeholder="{ex:Lang Key={x:Static langs:LangKeys.PlsEnterContent}}"
+                                hc:InfoElement.TitlePlacement="Left"
+                                hc:InfoElement.Title="{ex:Lang Key={x:Static langs:LangKeys.TitleDemoStr3}}"
+                                hc:InfoElement.Necessary="True"
+                                Margin="0,16,0,0"
+                                Style="{StaticResource TextBoxPlus.Small}">
+                        <hc:TextBox.Text>
+                            <Binding Path="Text2"
+                                     UpdateSourceTrigger="PropertyChanged">
+                                <Binding.ValidationRules>
+                                    <hc:NoBlankTextRule />
                                 </Binding.ValidationRules>
                             </Binding>
                         </hc:TextBox.Text>
                     </hc:TextBox>
-                    <hc:TextBox Width="380" hc:InfoElement.TitleWidth="140" hc:InfoElement.TitlePlacement="Left" hc:InfoElement.Title="{ex:Lang Key={x:Static langs:LangKeys.TitleDemoStr3}}" Margin="0,32,0,0" Text="{ex:Lang Key={x:Static langs:LangKeys.ContentDemoStr}}" Style="{StaticResource TextBoxPlus.Small}"/>
-                    <hc:TextBox hc:InfoElement.ShowClearButton="True" Width="380" hc:InfoElement.TitleWidth="140" hc:InfoElement.Placeholder="{ex:Lang Key={x:Static langs:LangKeys.PlsEnterContent}}" hc:InfoElement.TitlePlacement="Left" hc:InfoElement.Title="{ex:Lang Key={x:Static langs:LangKeys.TitleDemoStr3}}" hc:InfoElement.Necessary="True" Margin="0,16,0,0" Style="{StaticResource TextBoxPlus.Small}"/>
                 </StackPanel>
             </hc:UniformSpacingPanel>
         </hc:ScrollViewer>
diff --git a/src/Shared/HandyControlDemo_Shared/UserControl/Styles/NativeTextBoxDemo.xaml b/src/Shared/HandyControlDemo_Shared/UserControl/Styles/NativeTextBoxDemo.xaml
index 76f78330..620be1e1 100644
--- a/src/Shared/HandyControlDemo_Shared/UserControl/Styles/NativeTextBoxDemo.xaml
+++ b/src/Shared/HandyControlDemo_Shared/UserControl/Styles/NativeTextBoxDemo.xaml
@@ -4,29 +4,124 @@
              xmlns:hc="https://handyorg.github.io/handycontrol"
              xmlns:langs="clr-namespace:HandyControlDemo.Properties.Langs"
              xmlns:ex="clr-namespace:HandyControlDemo.Tools.Extension"
-             Background="{DynamicResource RegionBrush}">
+             Background="{DynamicResource RegionBrush}"
+             DataContext="{Binding InputElementDemo, Source={StaticResource Locator}}">
     <hc:TransitioningContentControl>
         <hc:ScrollViewer IsInertiaEnabled="True">
-            <hc:UniformSpacingPanel Spacing="32" Margin="32" ChildWrapping="Wrap">
+            <hc:UniformSpacingPanel Spacing="32"
+                                    Margin="32"
+                                    ChildWrapping="Wrap">
                 <StackPanel>
-                    <TextBox Text="{ex:Lang Key={x:Static langs:LangKeys.ContentDemoStr}}"/>
-                    <TextBox Text="{ex:Lang Key={x:Static langs:LangKeys.ContentDemoStr}}" Margin="0,16,0,0" IsEnabled="False"/>
+                    <TextBox Text="{ex:Lang Key={x:Static langs:LangKeys.ContentDemoStr}}" />
+                    <TextBox Text="{ex:Lang Key={x:Static langs:LangKeys.ContentDemoStr}}"
+                             Margin="0,16,0,0"
+                             IsEnabled="False" />
 
-                    <TextBox hc:InfoElement.Title="{ex:Lang Key={x:Static langs:LangKeys.TitleDemoStr1}}" Style="{StaticResource TextBoxExtend}" Margin="0,32,0,0" Text="{ex:Lang Key={x:Static langs:LangKeys.ContentDemoStr}}"/>
-                    <TextBox hc:InfoElement.Title="{ex:Lang Key={x:Static langs:LangKeys.TitleDemoStr1}}" Style="{StaticResource TextBoxExtend}" Margin="0,16,0,0" Text="{ex:Lang Key={x:Static langs:LangKeys.ContentDemoStr}}" IsEnabled="False"/>
-                    <TextBox hc:InfoElement.Placeholder="{ex:Lang Key={x:Static langs:LangKeys.PlsEnterContent}}" hc:InfoElement.Title="{ex:Lang Key={x:Static langs:LangKeys.TitleDemoStr2}}" Style="{StaticResource TextBoxExtend}" hc:InfoElement.Necessary="True" Margin="0,16,0,0"/>
-                    <TextBox Width="380" hc:InfoElement.TitleWidth="140" hc:InfoElement.TitlePlacement="Left" hc:InfoElement.Title="{ex:Lang Key={x:Static langs:LangKeys.TitleDemoStr3}}" Style="{StaticResource TextBoxExtend}" Margin="0,32,0,0" Text="{ex:Lang Key={x:Static langs:LangKeys.ContentDemoStr}}"/>
-                    <TextBox Width="380" hc:InfoElement.TitleWidth="140" hc:InfoElement.Placeholder="{ex:Lang Key={x:Static langs:LangKeys.PlsEnterContent}}" hc:InfoElement.TitlePlacement="Left" hc:InfoElement.Title="{ex:Lang Key={x:Static langs:LangKeys.TitleDemoStr3}}" hc:InfoElement.Necessary="True" Style="{StaticResource TextBoxExtend}" Margin="0,16,0,0"/>
+                    <TextBox hc:InfoElement.Title="{ex:Lang Key={x:Static langs:LangKeys.TitleDemoStr1}}"
+                             Style="{StaticResource TextBoxExtend}"
+                             Margin="0,32,0,0"
+                             Text="{ex:Lang Key={x:Static langs:LangKeys.ContentDemoStr}}" />
+                    <TextBox hc:InfoElement.Title="{ex:Lang Key={x:Static langs:LangKeys.TitleDemoStr1}}"
+                             Style="{StaticResource TextBoxExtend}"
+                             Margin="0,16,0,0"
+                             Text="{ex:Lang Key={x:Static langs:LangKeys.ContentDemoStr}}"
+                             IsEnabled="False" />
+                    <TextBox hc:InfoElement.Placeholder="{ex:Lang Key={x:Static langs:LangKeys.PlsEnterEmail}}"
+                             hc:InfoElement.Title="{ex:Lang Key={x:Static langs:LangKeys.TitleDemoStr2}}"
+                             Style="{StaticResource TextBoxExtend}"
+                             hc:InfoElement.Necessary="True"
+                             Margin="0,16,0,0">
+                        <TextBox.Text>
+                            <Binding Path="Email1"
+                                     UpdateSourceTrigger="PropertyChanged">
+                                <Binding.ValidationRules>
+                                    <hc:NoBlankTextRule />
+                                    <hc:RegexRule Type="Mail" />
+                                </Binding.ValidationRules>
+                            </Binding>
+                        </TextBox.Text>
+                    </TextBox>
+                    <TextBox Width="380"
+                             hc:InfoElement.TitleWidth="140"
+                             hc:InfoElement.TitlePlacement="Left"
+                             hc:InfoElement.Title="{ex:Lang Key={x:Static langs:LangKeys.TitleDemoStr3}}"
+                             Style="{StaticResource TextBoxExtend}"
+                             Margin="0,32,0,0"
+                             Text="{ex:Lang Key={x:Static langs:LangKeys.ContentDemoStr}}" />
+                    <TextBox Width="380"
+                             hc:InfoElement.TitleWidth="140"
+                             hc:InfoElement.Placeholder="{ex:Lang Key={x:Static langs:LangKeys.PlsEnterContent}}"
+                             hc:InfoElement.TitlePlacement="Left"
+                             hc:InfoElement.Title="{ex:Lang Key={x:Static langs:LangKeys.TitleDemoStr3}}"
+                             hc:InfoElement.Necessary="True"
+                             Style="{StaticResource TextBoxExtend}"
+                             Margin="0,16,0,0">
+                        <TextBox.Text>
+                            <Binding Path="Text1"
+                                     UpdateSourceTrigger="PropertyChanged">
+                                <Binding.ValidationRules>
+                                    <hc:NoBlankTextRule />
+                                </Binding.ValidationRules>
+                            </Binding>
+                        </TextBox.Text>
+                    </TextBox>
                 </StackPanel>
                 <StackPanel>
-                    <TextBox Text="{ex:Lang Key={x:Static langs:LangKeys.ContentDemoStr}}" Style="{StaticResource TextBox.Small}"/>
-                    <TextBox Text="{ex:Lang Key={x:Static langs:LangKeys.ContentDemoStr}}" Margin="0,16,0,0" IsEnabled="False" Style="{StaticResource TextBox.Small}"/>
+                    <TextBox Text="{ex:Lang Key={x:Static langs:LangKeys.ContentDemoStr}}"
+                             Style="{StaticResource TextBox.Small}" />
+                    <TextBox Text="{ex:Lang Key={x:Static langs:LangKeys.ContentDemoStr}}"
+                             Margin="0,16,0,0"
+                             IsEnabled="False"
+                             Style="{StaticResource TextBox.Small}" />
 
-                    <TextBox hc:InfoElement.Title="{ex:Lang Key={x:Static langs:LangKeys.TitleDemoStr1}}" Style="{StaticResource TextBoxExtend.Small}" Margin="0,32,0,0" Text="{ex:Lang Key={x:Static langs:LangKeys.ContentDemoStr}}"/>
-                    <TextBox hc:InfoElement.Title="{ex:Lang Key={x:Static langs:LangKeys.TitleDemoStr1}}" Style="{StaticResource TextBoxExtend.Small}" Margin="0,16,0,0" Text="{ex:Lang Key={x:Static langs:LangKeys.ContentDemoStr}}" IsEnabled="False"/>
-                    <TextBox hc:InfoElement.Placeholder="{ex:Lang Key={x:Static langs:LangKeys.PlsEnterContent}}" hc:InfoElement.Title="{ex:Lang Key={x:Static langs:LangKeys.TitleDemoStr2}}" Style="{StaticResource TextBoxExtend.Small}" hc:InfoElement.Necessary="True" Margin="0,16,0,0"/>
-                    <TextBox Width="380" hc:InfoElement.TitleWidth="140" hc:InfoElement.TitlePlacement="Left" hc:InfoElement.Title="{ex:Lang Key={x:Static langs:LangKeys.TitleDemoStr3}}" Style="{StaticResource TextBoxExtend.Small}" Margin="0,32,0,0" Text="{ex:Lang Key={x:Static langs:LangKeys.ContentDemoStr}}"/>
-                    <TextBox Width="380" hc:InfoElement.TitleWidth="140" hc:InfoElement.Placeholder="{ex:Lang Key={x:Static langs:LangKeys.PlsEnterContent}}" hc:InfoElement.TitlePlacement="Left" hc:InfoElement.Title="{ex:Lang Key={x:Static langs:LangKeys.TitleDemoStr3}}" hc:InfoElement.Necessary="True" Style="{StaticResource TextBoxExtend.Small}" Margin="0,16,0,0"/>
+                    <TextBox hc:InfoElement.Title="{ex:Lang Key={x:Static langs:LangKeys.TitleDemoStr1}}"
+                             Style="{StaticResource TextBoxExtend.Small}"
+                             Margin="0,32,0,0"
+                             Text="{ex:Lang Key={x:Static langs:LangKeys.ContentDemoStr}}" />
+                    <TextBox hc:InfoElement.Title="{ex:Lang Key={x:Static langs:LangKeys.TitleDemoStr1}}"
+                             Style="{StaticResource TextBoxExtend.Small}"
+                             Margin="0,16,0,0"
+                             Text="{ex:Lang Key={x:Static langs:LangKeys.ContentDemoStr}}"
+                             IsEnabled="False" />
+                    <TextBox hc:InfoElement.Placeholder="{ex:Lang Key={x:Static langs:LangKeys.PlsEnterEmail}}"
+                             hc:InfoElement.Title="{ex:Lang Key={x:Static langs:LangKeys.TitleDemoStr2}}"
+                             Style="{StaticResource TextBoxExtend.Small}"
+                             hc:InfoElement.Necessary="True"
+                             Margin="0,16,0,0">
+                        <TextBox.Text>
+                            <Binding Path="Email2"
+                                     UpdateSourceTrigger="PropertyChanged">
+                                <Binding.ValidationRules>
+                                    <hc:NoBlankTextRule />
+                                    <hc:RegexRule Type="Mail" />
+                                </Binding.ValidationRules>
+                            </Binding>
+                        </TextBox.Text>
+                    </TextBox>
+                    <TextBox Width="380"
+                             hc:InfoElement.TitleWidth="140"
+                             hc:InfoElement.TitlePlacement="Left"
+                             hc:InfoElement.Title="{ex:Lang Key={x:Static langs:LangKeys.TitleDemoStr3}}"
+                             Style="{StaticResource TextBoxExtend.Small}"
+                             Margin="0,32,0,0"
+                             Text="{ex:Lang Key={x:Static langs:LangKeys.ContentDemoStr}}" />
+                    <TextBox Width="380"
+                             hc:InfoElement.TitleWidth="140"
+                             hc:InfoElement.Placeholder="{ex:Lang Key={x:Static langs:LangKeys.PlsEnterContent}}"
+                             hc:InfoElement.TitlePlacement="Left"
+                             hc:InfoElement.Title="{ex:Lang Key={x:Static langs:LangKeys.TitleDemoStr3}}"
+                             hc:InfoElement.Necessary="True"
+                             Style="{StaticResource TextBoxExtend.Small}"
+                             Margin="0,16,0,0">
+                        <TextBox.Text>
+                            <Binding Path="Text2"
+                                     UpdateSourceTrigger="PropertyChanged">
+                                <Binding.ValidationRules>
+                                    <hc:NoBlankTextRule />
+                                </Binding.ValidationRules>
+                            </Binding>
+                        </TextBox.Text>
+                    </TextBox>
                 </StackPanel>
             </hc:UniformSpacingPanel>
         </hc:ScrollViewer>
diff --git a/src/Shared/HandyControlDemo_Shared/ViewModel/Common/InputElementDemoViewModel.cs b/src/Shared/HandyControlDemo_Shared/ViewModel/Common/InputElementDemoViewModel.cs
index 50fbc5d0..f5135270 100644
--- a/src/Shared/HandyControlDemo_Shared/ViewModel/Common/InputElementDemoViewModel.cs
+++ b/src/Shared/HandyControlDemo_Shared/ViewModel/Common/InputElementDemoViewModel.cs
@@ -13,6 +13,8 @@ public class InputElementDemoViewModel : ViewModelBase
 {
     private string _email1;
     private string _email2;
+    private string _text1;
+    private string _text2;
     private double _doubleValue1;
     private double _doubleValue2;
     private IList<string> _dataList;
@@ -38,6 +40,26 @@ public class InputElementDemoViewModel : ViewModelBase
 #endif
     }
 
+    public string Text1
+    {
+        get => _text1;
+#if NET40
+        set => Set(nameof(Text1), ref _text1, value);
+#else
+        set => Set(ref _text1, value);
+#endif
+    }
+
+    public string Text2
+    {
+        get => _text2;
+#if NET40
+        set => Set(nameof(Text2), ref _text2, value);
+#else
+        set => Set(ref _text2, value);
+#endif
+    }
+
     public double DoubleValue1
     {
         get => _doubleValue1;