diff --git a/src/Net_40/HandyControlDemo_Net_40/HandyControlDemo_Net_40.csproj b/src/Net_40/HandyControlDemo_Net_40/HandyControlDemo_Net_40.csproj
index 5bd91cb0..0f84bcab 100644
--- a/src/Net_40/HandyControlDemo_Net_40/HandyControlDemo_Net_40.csproj
+++ b/src/Net_40/HandyControlDemo_Net_40/HandyControlDemo_Net_40.csproj
@@ -402,6 +402,9 @@
     <Resource Include="..\..\Shared\HandyControlDemo_Shared\Resources\Img\LeftMainContent\GridPane_16x.png">
       <Link>Resources\Img\LeftMainContent\GridPane_16x.png</Link>
     </Resource>
+    <Resource Include="..\..\Shared\HandyControlDemo_Shared\Resources\Img\LeftMainContent\AutoComplete_16x.png">
+      <Link>Resources\Img\LeftMainContent\AutoComplete_16x.png</Link>
+    </Resource>
     <Resource Include="..\..\Shared\HandyControlDemo_Shared\Resources\Img\under_construction.gif">
       <Link>Resources\Img\under_construction.gif</Link>
     </Resource>
diff --git a/src/Net_40/HandyControl_Net_40/Themes/Theme.xaml b/src/Net_40/HandyControl_Net_40/Themes/Theme.xaml
index 73429799..aa01a0d6 100644
--- a/src/Net_40/HandyControl_Net_40/Themes/Theme.xaml
+++ b/src/Net_40/HandyControl_Net_40/Themes/Theme.xaml
@@ -11250,6 +11250,113 @@
 			</Setter.Value>
 		</Setter>
 	</Style>
+	<Style x:Key="AutoCompleteTextBoxInternal" BasedOn="{StaticResource ComboBoxEditableTextBox}" TargetType="TextBox" />
+	<Style x:Key="AutoCompleteTextBoxItemBaseStyle" TargetType="ComboBoxItem">
+		<Setter Property="Padding" Value="{StaticResource DefaultControlPadding}" />
+		<Setter Property="SnapsToDevicePixels" Value="True" />
+		<Setter Property="Background" Value="Transparent" />
+		<Setter Property="BorderBrush" Value="Transparent" />
+		<Setter Property="BorderThickness" Value="0" />
+		<Setter Property="MinHeight" Value="{StaticResource DefaultControlHeight}" />
+		<Setter Property="Focusable" Value="False" />
+		<Setter Property="FocusVisualStyle" Value="{x:Null}" />
+		<Setter Property="Template">
+			<Setter.Value>
+				<ControlTemplate TargetType="ComboBoxItem">
+					<Border x:Name="Bd" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" Background="{TemplateBinding Background}" Padding="{TemplateBinding Padding}" SnapsToDevicePixels="true">
+						<ContentPresenter HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" VerticalAlignment="{TemplateBinding VerticalContentAlignment}" />
+					</Border>
+					<ControlTemplate.Triggers>
+						<MultiTrigger>
+							<MultiTrigger.Conditions>
+								<Condition Property="IsSelected" Value="False" />
+								<Condition Property="IsMouseOver" Value="True" />
+							</MultiTrigger.Conditions>
+							<Setter Property="Background" TargetName="Bd" Value="{DynamicResource SecondaryRegionBrush}" />
+						</MultiTrigger>
+						<Trigger Property="IsSelected" Value="True">
+							<Setter Property="Background" TargetName="Bd" Value="{DynamicResource PrimaryBrush}" />
+							<Setter Property="Foreground" Value="White" />
+						</Trigger>
+					</ControlTemplate.Triggers>
+				</ControlTemplate>
+			</Setter.Value>
+		</Setter>
+	</Style>
+	<Style x:Key="AutoCompleteTextBoxBaseStyle" TargetType="hc:AutoCompleteTextBox">
+		<Setter Property="FocusVisualStyle" Value="{x:Null}" />
+		<Setter Property="Background" Value="{DynamicResource RegionBrush}" />
+		<Setter Property="hc:BorderElement.CornerRadius" Value="{StaticResource DefaultCornerRadius}" />
+		<Setter Property="BorderBrush" Value="{DynamicResource BorderBrush}" />
+		<Setter Property="Foreground" Value="{DynamicResource PrimaryTextBrush}" />
+		<Setter Property="BorderThickness" Value="1" />
+		<Setter Property="ScrollViewer.HorizontalScrollBarVisibility" Value="Auto" />
+		<Setter Property="ScrollViewer.VerticalScrollBarVisibility" Value="Auto" />
+		<Setter Property="MinHeight" Value="{StaticResource DefaultControlHeight}" />
+		<Setter Property="ScrollViewer.CanContentScroll" Value="true" />
+		<Setter Property="ScrollViewer.PanningMode" Value="Both" />
+		<Setter Property="Stylus.IsFlicksEnabled" Value="False" />
+		<Setter Property="Padding" Value="{StaticResource DefaultInputPadding}" />
+		<Setter Property="VerticalContentAlignment" Value="Center" />
+		<Setter Property="Validation.ErrorTemplate" Value="{x:Null}" />
+		<Setter Property="ItemContainerStyle" Value="{StaticResource AutoCompleteTextBoxItemBaseStyle}" />
+		<Setter Property="IsTabStop" Value="false" />
+		<Setter Property="hc:Empty.ShowEmpty" Value="True" />
+		<Setter Property="Template">
+			<Setter.Value>
+				<ControlTemplate TargetType="hc:AutoCompleteTextBox">
+					<hc:SimplePanel>
+						<Border CornerRadius="{Binding Path=(hc:BorderElement.CornerRadius),RelativeSource={RelativeSource TemplatedParent}}" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" Background="{TemplateBinding Background}" SnapsToDevicePixels="true">
+							<TextBox x:Name="PART_SearchTextBox" Padding="{TemplateBinding Padding}" Style="{StaticResource AutoCompleteTextBoxInternal}" />
+						</Border>
+						<Popup x:Name="PART_Popup" AllowsTransparency="true" IsOpen="{Binding IsDropDownOpen, Mode=TwoWay, RelativeSource={RelativeSource TemplatedParent}}" Margin="1" PopupAnimation="{StaticResource {x:Static SystemParameters.ComboBoxPopupAnimationKey}}" Placement="Bottom">
+							<Border BorderThickness="0,1,0,0" Effect="{StaticResource EffectShadow2}" Margin="8,0,8,8" CornerRadius="{Binding Path=(hc:BorderElement.CornerRadius),RelativeSource={RelativeSource TemplatedParent}}" x:Name="dropDownBorder" MinWidth="{Binding ActualWidth, ElementName=toggleButton}" MaxHeight="{TemplateBinding MaxDropDownHeight}" BorderBrush="{DynamicResource BorderBrush}" Background="{DynamicResource RegionBrush}">
+								<hc:ToggleBlock IsChecked="{Binding HasItems,RelativeSource={RelativeSource TemplatedParent},Mode=OneWay}" VerticalContentAlignment="Stretch" HorizontalContentAlignment="Stretch">
+									<hc:ToggleBlock.CheckedContent>
+										<ScrollViewer Margin="0,4">
+											<ItemsPresenter x:Name="ItemsPresenter" KeyboardNavigation.DirectionalNavigation="Contained" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" />
+										</ScrollViewer>
+									</hc:ToggleBlock.CheckedContent>
+									<hc:ToggleBlock.UnCheckedContent>
+										<hc:Empty />
+									</hc:ToggleBlock.UnCheckedContent>
+								</hc:ToggleBlock>
+							</Border>
+						</Popup>
+					</hc:SimplePanel>
+					<ControlTemplate.Triggers>
+						<Trigger Property="HasItems" Value="false">
+							<Setter Property="Height" TargetName="dropDownBorder" Value="95" />
+						</Trigger>
+						<Trigger Property="hc:DropDownElement.ConsistentWidth" Value="True">
+							<Setter Property="MaxWidth" TargetName="dropDownBorder" Value="{Binding ActualWidth, ElementName=PART_SearchTextBox}" />
+							<Setter Property="MinWidth" TargetName="dropDownBorder" Value="{Binding ActualWidth, ElementName=PART_SearchTextBox}" />
+						</Trigger>
+						<Trigger Property="hc:DropDownElement.AutoWidth" Value="True">
+							<Setter Property="MaxWidth" TargetName="dropDownBorder" Value="{x:Static system:Double.MaxValue}" />
+							<Setter Property="MinWidth" TargetName="dropDownBorder" Value="{Binding ActualHeight, ElementName=PART_SearchTextBox}" />
+						</Trigger>
+						<Trigger Property="IsMouseOver" Value="true" SourceName="PART_SearchTextBox">
+							<Setter Property="BorderBrush" Value="{DynamicResource SecondaryBorderBrush}" />
+						</Trigger>
+						<MultiTrigger>
+							<MultiTrigger.Conditions>
+								<Condition Property="IsMouseOver" Value="true" />
+								<Condition Property="IsFocused" Value="false" SourceName="PART_SearchTextBox" />
+							</MultiTrigger.Conditions>
+							<Setter Property="BorderBrush" Value="{DynamicResource SecondaryBorderBrush}" />
+						</MultiTrigger>
+						<Trigger Property="IsFocused" Value="True" SourceName="PART_SearchTextBox">
+							<Setter Property="BorderBrush" Value="{DynamicResource PrimaryBrush}" />
+						</Trigger>
+						<Trigger Property="IsEnabled" Value="false">
+							<Setter Property="Opacity" Value="0.4" />
+						</Trigger>
+					</ControlTemplate.Triggers>
+				</ControlTemplate>
+			</Setter.Value>
+		</Setter>
+	</Style>
 	<Style BasedOn="{StaticResource BadgeBaseStyle}" TargetType="hc:Badge">
 		<Setter Property="Foreground" Value="{DynamicResource PrimaryTextBrush}" />
 	</Style>
@@ -12878,6 +12985,7 @@
 	<Style BasedOn="{StaticResource TreeViewItemBaseStyle}" TargetType="TreeViewItem" />
 	<Style BasedOn="{StaticResource TreeViewBaseStyle}" TargetType="TreeView" />
 	<Style BasedOn="{StaticResource WatermarkBaseStyle}" TargetType="hc:Watermark" />
+	<Style BasedOn="{StaticResource AutoCompleteTextBoxBaseStyle}" TargetType="hc:AutoCompleteTextBox" />
 	<ControlTemplate x:Key="TipSliderThumbHorizontalTop" TargetType="Thumb">
 		<hc:AxleCanvas>
 			<Label Name="LabelValue" IsHitTestVisible="False" Opacity="0" Canvas.Bottom="28" Style="{StaticResource LabelPrimary}" Content="{Binding Value,RelativeSource={RelativeSource AncestorType=Slider}}" ContentStringFormat="{Binding Path=(hc:TipElement.StringFormat),RelativeSource={RelativeSource AncestorType=Slider}}" />
diff --git a/src/Net_GE45/HandyControlDemo_Net_GE45/HandyControlDemo_Net_GE45.csproj b/src/Net_GE45/HandyControlDemo_Net_GE45/HandyControlDemo_Net_GE45.csproj
index 246ff69d..9aaf0808 100644
--- a/src/Net_GE45/HandyControlDemo_Net_GE45/HandyControlDemo_Net_GE45.csproj
+++ b/src/Net_GE45/HandyControlDemo_Net_GE45/HandyControlDemo_Net_GE45.csproj
@@ -404,6 +404,9 @@
     <Resource Include="..\..\Shared\HandyControlDemo_Shared\Resources\Img\LeftMainContent\GridPane_16x.png">
       <Link>Resources\Img\LeftMainContent\GridPane_16x.png</Link>
     </Resource>
+    <Resource Include="..\..\Shared\HandyControlDemo_Shared\Resources\Img\LeftMainContent\AutoComplete_16x.png">
+      <Link>Resources\Img\LeftMainContent\AutoComplete_16x.png</Link>
+    </Resource>
     <Resource Include="..\..\Shared\HandyControlDemo_Shared\Resources\Img\under_construction.gif">
       <Link>Resources\Img\under_construction.gif</Link>
     </Resource>
diff --git a/src/Shared/HandyControlDemo_Code/HandyControlDemo_Code.csproj b/src/Shared/HandyControlDemo_Code/HandyControlDemo_Code.csproj
index d3d99dea..9e3731c4 100644
--- a/src/Shared/HandyControlDemo_Code/HandyControlDemo_Code.csproj
+++ b/src/Shared/HandyControlDemo_Code/HandyControlDemo_Code.csproj
@@ -56,6 +56,9 @@
     <Resource Include="..\..\Shared\HandyControlDemo_Shared\UserControl\Controls\AnimationPathDemoCtl.xaml">
       <Link>UserControl\Controls\AnimationPathDemoCtl.xaml</Link>
     </Resource>
+    <Resource Include="..\..\Shared\HandyControlDemo_Shared\UserControl\Controls\AutoCompleteTextBoxDemoCtl.xaml">
+      <Link>UserControl\Controls\AutoCompleteTextBoxDemoCtl.xaml</Link>
+    </Resource>
     <Resource Include="..\..\Shared\HandyControlDemo_Shared\UserControl\Controls\BadgeDemoCtl.xaml">
       <Link>UserControl\Controls\BadgeDemoCtl.xaml</Link>
     </Resource>
@@ -431,6 +434,10 @@
       <Link>UserControl\Controls\AnimationPathDemoCtl.xaml.cs</Link>
       <DependentUpon>AnimationPathDemoCtl.xaml</DependentUpon>
     </Resource>
+    <Resource Include="..\..\Shared\HandyControlDemo_Shared\UserControl\Controls\AutoCompleteTextBoxDemoCtl.xaml.cs">
+      <Link>UserControl\Controls\AutoCompleteTextBoxDemoCtl.xaml.cs</Link>
+      <DependentUpon>AutoCompleteTextBoxDemoCtl.xaml</DependentUpon>
+    </Resource>
     <Resource Include="..\..\Shared\HandyControlDemo_Shared\UserControl\Controls\BadgeDemoCtl.xaml.cs">
       <Link>UserControl\Controls\BadgeDemoCtl.xaml.cs</Link>
       <DependentUpon>BadgeDemoCtl.xaml</DependentUpon>
@@ -850,6 +857,9 @@
     <Resource Include="..\..\Shared\HandyControlDemo_Shared\ViewModel\Common\ComboBoxDemoViewModel.cs">
       <Link>ViewModel\ComboBoxDemoViewModel.cs</Link>
     </Resource>
+    <Resource Include="..\..\Shared\HandyControlDemo_Shared\ViewModel\Controls\AutoCompleteTextBoxDemoViewModel.cs">
+      <Link>ViewModel\AutoCompleteTextBoxDemoViewModel.cs</Link>
+    </Resource>
     <Resource Include="..\..\Shared\HandyControlDemo_Shared\ViewModel\Controls\BadgeDemoViewModel.cs">
       <Link>ViewModel\BadgeDemoViewModel.cs</Link>
     </Resource>
diff --git a/src/Shared/HandyControlDemo_Shared/Data/DemoInfo.json b/src/Shared/HandyControlDemo_Shared/Data/DemoInfo.json
index a767567c..13ed6605 100644
--- a/src/Shared/HandyControlDemo_Shared/Data/DemoInfo.json
+++ b/src/Shared/HandyControlDemo_Shared/Data/DemoInfo.json
@@ -44,7 +44,7 @@
     "demoItemList": [
       [ "FloatingBlock", "FloatingBlockDemoCtl", "thumbs_up", "", "Interacting" ],
       [ "PropertyGrid", "PropertyGridDemoCtl", "PropertyGridEditorPart_16x", "", "DataEntry" ],
-      [ "ImageSelector", "ImageSelectorDemoCtl", "Image_16x", "1", "DataEntry" ],
+      [ "ImageSelector", "ImageSelectorDemoCtl", "Image_16x", "", "DataEntry" ],
       [ "ImageBlock", "ImageBlockDemoCtl", "ImageStack_16x", "", "DataDisplay" ],
       [ "Magnifier", "MagnifierDemoCtl", "Search_16x", "", "Interacting" ],
       [ "Gravatar", "GravatarDemoCtl", "User_16x", "", "DataDisplay" ],
@@ -57,6 +57,7 @@
       [ "TextBox", "TextBoxDemoCtl", "TextBox_16x", "", "DataEntry" ],
       [ "ComboBox", "ComboBoxDemoCtl", "ComboBox_16x", "", "DataEntry" ],
       [ "CheckComboBox", "CheckComboBoxDemoCtl", "CheckBoxList_16x", "1", "DataEntry" ],
+      [ "AutoCompleteTextBox", "AutoCompleteTextBoxDemoCtl", "AutoComplete_16x", "1", "DataEntry" ],
       [ "PasswordBox", "PasswordBoxDemoCtl", "PasswordBox_16x", "", "DataEntry" ],
       [ "PinBox", "PinBoxDemoCtl", "Ellipsis_16x", "", "DataEntry" ],
       [ "DatePicker", "DatePickerDemoCtl", "DatePicker_16x", "", "DataEntry" ],
diff --git a/src/Shared/HandyControlDemo_Shared/HandyControlDemo_Shared.projitems b/src/Shared/HandyControlDemo_Shared/HandyControlDemo_Shared.projitems
index 70321550..d672b443 100644
--- a/src/Shared/HandyControlDemo_Shared/HandyControlDemo_Shared.projitems
+++ b/src/Shared/HandyControlDemo_Shared/HandyControlDemo_Shared.projitems
@@ -60,6 +60,9 @@
     <Compile Include="$(MSBuildThisFileDirectory)UserControl\Basic\TextDialogWithTimer.xaml.cs">
       <DependentUpon>TextDialogWithTimer.xaml</DependentUpon>
     </Compile>
+    <Compile Include="$(MSBuildThisFileDirectory)UserControl\Controls\AutoCompleteTextBoxDemoCtl.xaml.cs">
+      <DependentUpon>AutoCompleteTextBoxDemoCtl.xaml</DependentUpon>
+    </Compile>
     <Compile Include="$(MSBuildThisFileDirectory)UserControl\Controls\ElementGroupDemoCtl.xaml.cs">
       <DependentUpon>ElementGroupDemoCtl.xaml</DependentUpon>
     </Compile>
@@ -408,6 +411,7 @@
     <Compile Include="$(MSBuildThisFileDirectory)ViewModel\Basic\ChatBoxViewModel.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)ViewModel\Basic\InteractiveDialogViewModel.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)ViewModel\Common\ComboBoxDemoViewModel.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)ViewModel\Controls\AutoCompleteTextBoxDemoViewModel.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)ViewModel\Controls\BadgeDemoViewModel.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)ViewModel\Controls\CardDemoViewModel.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)ViewModel\Controls\CoverViewModel.cs" />
@@ -540,6 +544,10 @@
       <SubType>Designer</SubType>
       <Generator>MSBuild:Compile</Generator>
     </Page>
+    <Page Include="$(MSBuildThisFileDirectory)UserControl\Controls\AutoCompleteTextBoxDemoCtl.xaml">
+      <SubType>Designer</SubType>
+      <Generator>MSBuild:Compile</Generator>
+    </Page>
     <Page Include="$(MSBuildThisFileDirectory)UserControl\Controls\ElementGroupDemoCtl.xaml">
       <SubType>Designer</SubType>
       <Generator>MSBuild:Compile</Generator>
diff --git a/src/Shared/HandyControlDemo_Shared/Properties/Langs/Lang.Designer.cs b/src/Shared/HandyControlDemo_Shared/Properties/Langs/Lang.Designer.cs
index 911f565e..9db8b90f 100644
--- a/src/Shared/HandyControlDemo_Shared/Properties/Langs/Lang.Designer.cs
+++ b/src/Shared/HandyControlDemo_Shared/Properties/Langs/Lang.Designer.cs
@@ -124,6 +124,17 @@ namespace HandyControlDemo.Properties.Langs
             }
         }
 
+        /// <summary>
+        ///   Looks up a localized string similar to 自动补全文本框.
+        /// </summary>
+        public static string AutoCompleteTextBox
+        {
+            get
+            {
+                return ResourceManager.GetString("AutoCompleteTextBox", resourceCulture);
+            }
+        }
+
         /// <summary>
         ///   Looks up a localized string similar to 标记.
         /// </summary>
diff --git a/src/Shared/HandyControlDemo_Shared/Properties/Langs/Lang.ca-ES.resx b/src/Shared/HandyControlDemo_Shared/Properties/Langs/Lang.ca-ES.resx
index f46c26b4..3ad5692c 100644
--- a/src/Shared/HandyControlDemo_Shared/Properties/Langs/Lang.ca-ES.resx
+++ b/src/Shared/HandyControlDemo_Shared/Properties/Langs/Lang.ca-ES.resx
@@ -798,4 +798,7 @@
   <data name="ElementGroup" xml:space="preserve">
     <value>ElementGroup</value>
   </data>
+  <data name="AutoCompleteTextBox" xml:space="preserve">
+    <value>AutoCompleteTextBox</value>
+  </data>
 </root>
\ No newline at end of file
diff --git a/src/Shared/HandyControlDemo_Shared/Properties/Langs/Lang.en.resx b/src/Shared/HandyControlDemo_Shared/Properties/Langs/Lang.en.resx
index 76e2f64d..7002d977 100644
--- a/src/Shared/HandyControlDemo_Shared/Properties/Langs/Lang.en.resx
+++ b/src/Shared/HandyControlDemo_Shared/Properties/Langs/Lang.en.resx
@@ -798,4 +798,7 @@
   <data name="ElementGroup" xml:space="preserve">
     <value>ElementGroup</value>
   </data>
+  <data name="AutoCompleteTextBox" xml:space="preserve">
+    <value>AutoCompleteTextBox</value>
+  </data>
 </root>
\ No newline at end of file
diff --git a/src/Shared/HandyControlDemo_Shared/Properties/Langs/Lang.es.resx b/src/Shared/HandyControlDemo_Shared/Properties/Langs/Lang.es.resx
index 4b9f220e..68a8d7ac 100644
--- a/src/Shared/HandyControlDemo_Shared/Properties/Langs/Lang.es.resx
+++ b/src/Shared/HandyControlDemo_Shared/Properties/Langs/Lang.es.resx
@@ -1,4 +1,4 @@
-<?xml version="1.0" encoding="utf-8"?>
+<?xml version="1.0" encoding="utf-8"?>
 <root>
   <!-- 
     Microsoft ResX Schema 
@@ -798,4 +798,7 @@
   <data name="ElementGroup" xml:space="preserve">
     <value>ElementGroup</value>
   </data>
+  <data name="AutoCompleteTextBox" xml:space="preserve">
+    <value>AutoCompleteTextBox</value>
+  </data>
 </root>
\ No newline at end of file
diff --git a/src/Shared/HandyControlDemo_Shared/Properties/Langs/Lang.fa.resx b/src/Shared/HandyControlDemo_Shared/Properties/Langs/Lang.fa.resx
index f3343209..46cf3986 100644
--- a/src/Shared/HandyControlDemo_Shared/Properties/Langs/Lang.fa.resx
+++ b/src/Shared/HandyControlDemo_Shared/Properties/Langs/Lang.fa.resx
@@ -798,4 +798,7 @@
   <data name="ElementGroup" xml:space="preserve">
     <value>ElementGroup</value>
   </data>
+  <data name="AutoCompleteTextBox" xml:space="preserve">
+    <value>AutoCompleteTextBox</value>
+  </data>
 </root>
\ No newline at end of file
diff --git a/src/Shared/HandyControlDemo_Shared/Properties/Langs/Lang.fr.resx b/src/Shared/HandyControlDemo_Shared/Properties/Langs/Lang.fr.resx
index 005659a7..3b8baefe 100644
--- a/src/Shared/HandyControlDemo_Shared/Properties/Langs/Lang.fr.resx
+++ b/src/Shared/HandyControlDemo_Shared/Properties/Langs/Lang.fr.resx
@@ -798,4 +798,7 @@
   <data name="ElementGroup" xml:space="preserve">
     <value>ElementGroup</value>
   </data>
+  <data name="AutoCompleteTextBox" xml:space="preserve">
+    <value>AutoCompleteTextBox</value>
+  </data>
 </root>
\ No newline at end of file
diff --git a/src/Shared/HandyControlDemo_Shared/Properties/Langs/Lang.ko-KR.resx b/src/Shared/HandyControlDemo_Shared/Properties/Langs/Lang.ko-KR.resx
index 5f795e6a..bc17ba33 100644
--- a/src/Shared/HandyControlDemo_Shared/Properties/Langs/Lang.ko-KR.resx
+++ b/src/Shared/HandyControlDemo_Shared/Properties/Langs/Lang.ko-KR.resx
@@ -798,4 +798,7 @@
   <data name="ElementGroup" xml:space="preserve">
     <value>ElementGroup</value>
   </data>
+  <data name="AutoCompleteTextBox" xml:space="preserve">
+    <value>AutoCompleteTextBox</value>
+  </data>
 </root>
\ No newline at end of file
diff --git a/src/Shared/HandyControlDemo_Shared/Properties/Langs/Lang.pl.resx b/src/Shared/HandyControlDemo_Shared/Properties/Langs/Lang.pl.resx
index ff19a815..e8365371 100644
--- a/src/Shared/HandyControlDemo_Shared/Properties/Langs/Lang.pl.resx
+++ b/src/Shared/HandyControlDemo_Shared/Properties/Langs/Lang.pl.resx
@@ -798,4 +798,7 @@
   <data name="ElementGroup" xml:space="preserve">
     <value>ElementGroup</value>
   </data>
+  <data name="AutoCompleteTextBox" xml:space="preserve">
+    <value>AutoCompleteTextBox</value>
+  </data>
 </root>
\ No newline at end of file
diff --git a/src/Shared/HandyControlDemo_Shared/Properties/Langs/Lang.pt-BR.resx b/src/Shared/HandyControlDemo_Shared/Properties/Langs/Lang.pt-BR.resx
index d59601c3..3238f146 100644
--- a/src/Shared/HandyControlDemo_Shared/Properties/Langs/Lang.pt-BR.resx
+++ b/src/Shared/HandyControlDemo_Shared/Properties/Langs/Lang.pt-BR.resx
@@ -798,4 +798,7 @@
   <data name="ElementGroup" xml:space="preserve">
     <value>ElementGroup</value>
   </data>
+  <data name="AutoCompleteTextBox" xml:space="preserve">
+    <value>AutoCompleteTextBox</value>
+  </data>
 </root>
\ No newline at end of file
diff --git a/src/Shared/HandyControlDemo_Shared/Properties/Langs/Lang.resx b/src/Shared/HandyControlDemo_Shared/Properties/Langs/Lang.resx
index 033454bb..f98e089a 100644
--- a/src/Shared/HandyControlDemo_Shared/Properties/Langs/Lang.resx
+++ b/src/Shared/HandyControlDemo_Shared/Properties/Langs/Lang.resx
@@ -798,4 +798,7 @@
   <data name="ElementGroup" xml:space="preserve">
     <value>元素组</value>
   </data>
+  <data name="AutoCompleteTextBox" xml:space="preserve">
+    <value>自动补全文本框</value>
+  </data>
 </root>
\ No newline at end of file
diff --git a/src/Shared/HandyControlDemo_Shared/Properties/Langs/Lang.ru.resx b/src/Shared/HandyControlDemo_Shared/Properties/Langs/Lang.ru.resx
index c6906b6c..5759095a 100644
--- a/src/Shared/HandyControlDemo_Shared/Properties/Langs/Lang.ru.resx
+++ b/src/Shared/HandyControlDemo_Shared/Properties/Langs/Lang.ru.resx
@@ -798,4 +798,7 @@
   <data name="ElementGroup" xml:space="preserve">
     <value>ElementGroup</value>
   </data>
+  <data name="AutoCompleteTextBox" xml:space="preserve">
+    <value>AutoCompleteTextBox</value>
+  </data>
 </root>
\ No newline at end of file
diff --git a/src/Shared/HandyControlDemo_Shared/Properties/Langs/Lang.tr.resx b/src/Shared/HandyControlDemo_Shared/Properties/Langs/Lang.tr.resx
index 43349182..bd8bda39 100644
--- a/src/Shared/HandyControlDemo_Shared/Properties/Langs/Lang.tr.resx
+++ b/src/Shared/HandyControlDemo_Shared/Properties/Langs/Lang.tr.resx
@@ -798,4 +798,7 @@
   <data name="ElementGroup" xml:space="preserve">
     <value>ElementGroup</value>
   </data>
+  <data name="AutoCompleteTextBox" xml:space="preserve">
+    <value>AutoCompleteTextBox</value>
+  </data>
 </root>
\ No newline at end of file
diff --git a/src/Shared/HandyControlDemo_Shared/Properties/Langs/LangProvider.cs b/src/Shared/HandyControlDemo_Shared/Properties/Langs/LangProvider.cs
index ea501923..da3d7230 100644
--- a/src/Shared/HandyControlDemo_Shared/Properties/Langs/LangProvider.cs
+++ b/src/Shared/HandyControlDemo_Shared/Properties/Langs/LangProvider.cs
@@ -42,6 +42,7 @@ namespace HandyControlDemo.Properties.Langs
             OnPropertyChanged(nameof(AnimationPath));
             OnPropertyChanged(nameof(AppClosingTip));
             OnPropertyChanged(nameof(Ask));
+            OnPropertyChanged(nameof(AutoCompleteTextBox));
             OnPropertyChanged(nameof(Badge));
             OnPropertyChanged(nameof(BasicInfo));
             OnPropertyChanged(nameof(BasicLayout));
@@ -291,6 +292,11 @@ namespace HandyControlDemo.Properties.Langs
         /// </summary>
 		public string Ask => Lang.Ask;
 
+        /// <summary>
+        ///   查找类似 自动补全文本框 的本地化字符串。
+        /// </summary>
+		public string AutoCompleteTextBox => Lang.AutoCompleteTextBox;
+
         /// <summary>
         ///   查找类似 标记 的本地化字符串。
         /// </summary>
@@ -564,7 +570,7 @@ namespace HandyControlDemo.Properties.Langs
         /// <summary>
         ///   查找类似 元素组 的本地化字符串。
         /// </summary>
-        public string ElementGroup => Lang.ElementGroup;
+		public string ElementGroup => Lang.ElementGroup;
 
         /// <summary>
         ///   查找类似 邮箱 的本地化字符串。
@@ -574,7 +580,7 @@ namespace HandyControlDemo.Properties.Langs
         /// <summary>
         ///   查找类似 空状态 的本地化字符串。
         /// </summary>
-        public string Empty => Lang.Empty;
+		public string Empty => Lang.Empty;
 
         /// <summary>
         ///   查找类似 错误 的本地化字符串。
@@ -1435,6 +1441,11 @@ namespace HandyControlDemo.Properties.Langs
         /// </summary>
 		public static string Ask = nameof(Ask);
 
+        /// <summary>
+        ///   查找类似 自动补全文本框 的本地化字符串。
+        /// </summary>
+		public static string AutoCompleteTextBox = nameof(AutoCompleteTextBox);
+
         /// <summary>
         ///   查找类似 标记 的本地化字符串。
         /// </summary>
@@ -1708,7 +1719,7 @@ namespace HandyControlDemo.Properties.Langs
         /// <summary>
         ///   查找类似 元素组 的本地化字符串。
         /// </summary>
-        public static string ElementGroup = nameof(ElementGroup);
+		public static string ElementGroup = nameof(ElementGroup);
 
         /// <summary>
         ///   查找类似 邮箱 的本地化字符串。
@@ -1718,7 +1729,7 @@ namespace HandyControlDemo.Properties.Langs
         /// <summary>
         ///   查找类似 空状态 的本地化字符串。
         /// </summary>
-        public static string Empty = nameof(Empty);
+		public static string Empty = nameof(Empty);
 
         /// <summary>
         ///   查找类似 错误 的本地化字符串。
diff --git a/src/Shared/HandyControlDemo_Shared/Resources/Img/LeftMainContent/AutoComplete_16x.png b/src/Shared/HandyControlDemo_Shared/Resources/Img/LeftMainContent/AutoComplete_16x.png
new file mode 100644
index 00000000..3b943f5d
Binary files /dev/null and b/src/Shared/HandyControlDemo_Shared/Resources/Img/LeftMainContent/AutoComplete_16x.png differ
diff --git a/src/Shared/HandyControlDemo_Shared/UserControl/Controls/AutoCompleteTextBoxDemoCtl.xaml b/src/Shared/HandyControlDemo_Shared/UserControl/Controls/AutoCompleteTextBoxDemoCtl.xaml
new file mode 100644
index 00000000..3721593a
--- /dev/null
+++ b/src/Shared/HandyControlDemo_Shared/UserControl/Controls/AutoCompleteTextBoxDemoCtl.xaml
@@ -0,0 +1,10 @@
+<UserControl x:Class="HandyControlDemo.UserControl.AutoCompleteTextBoxDemoCtl"
+             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+             Background="{DynamicResource RegionBrush}"
+             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+             xmlns:hc="https://handyorg.github.io/handycontrol"
+             DataContext="{Binding AutoCompleteTextBoxDemo, Source={StaticResource Locator}}">
+    <hc:TransitioningContentControl>
+        <hc:AutoCompleteTextBox Width="380" VerticalAlignment="Center" HorizontalAlignment="Center" Margin="32" ItemsSource="{Binding Items}" Text="{Binding SearchText}" DisplayMemberPath="Name"/>
+    </hc:TransitioningContentControl>
+</UserControl>
diff --git a/src/Shared/HandyControlDemo_Shared/UserControl/Controls/AutoCompleteTextBoxDemoCtl.xaml.cs b/src/Shared/HandyControlDemo_Shared/UserControl/Controls/AutoCompleteTextBoxDemoCtl.xaml.cs
new file mode 100644
index 00000000..1baf6628
--- /dev/null
+++ b/src/Shared/HandyControlDemo_Shared/UserControl/Controls/AutoCompleteTextBoxDemoCtl.xaml.cs
@@ -0,0 +1,10 @@
+namespace HandyControlDemo.UserControl
+{
+    public partial class AutoCompleteTextBoxDemoCtl
+    {
+        public AutoCompleteTextBoxDemoCtl()
+        {
+            InitializeComponent();
+        }
+    }
+}
diff --git a/src/Shared/HandyControlDemo_Shared/ViewModel/Controls/AutoCompleteTextBoxDemoViewModel.cs b/src/Shared/HandyControlDemo_Shared/ViewModel/Controls/AutoCompleteTextBoxDemoViewModel.cs
new file mode 100644
index 00000000..b9d69453
--- /dev/null
+++ b/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;
+        }
+    }
+}
diff --git a/src/Shared/HandyControlDemo_Shared/ViewModel/ViewModelLocator.cs b/src/Shared/HandyControlDemo_Shared/ViewModel/ViewModelLocator.cs
index b2710e4f..80f876a3 100644
--- a/src/Shared/HandyControlDemo_Shared/ViewModel/ViewModelLocator.cs
+++ b/src/Shared/HandyControlDemo_Shared/ViewModel/ViewModelLocator.cs
@@ -39,6 +39,7 @@ namespace HandyControlDemo.ViewModel
             SimpleIoc.Default.Register<NotificationDemoViewModel>();
             SimpleIoc.Default.Register<SplitButtonDemoViewModel>();
             SimpleIoc.Default.Register<TagDemoViewModel>();
+            SimpleIoc.Default.Register<AutoCompleteTextBoxDemoViewModel>();
         }
 
         public static ViewModelLocator Instance = new Lazy<ViewModelLocator>(() =>
@@ -100,6 +101,8 @@ namespace HandyControlDemo.ViewModel
 
         public TagDemoViewModel TagDemo => new(SimpleIoc.Default.GetInstance<DataService>());
 
+        public AutoCompleteTextBoxDemoViewModel AutoCompleteTextBoxDemo => new(SimpleIoc.Default.GetInstance<DataService>());
+
         #endregion
     }
 }
diff --git a/src/Shared/HandyControl_Shared/Collections/ManualObservableCollection`1.cs b/src/Shared/HandyControl_Shared/Collections/ManualObservableCollection`1.cs
index 645687e0..211f1b64 100644
--- a/src/Shared/HandyControl_Shared/Collections/ManualObservableCollection`1.cs
+++ b/src/Shared/HandyControl_Shared/Collections/ManualObservableCollection`1.cs
@@ -1,4 +1,5 @@
 using System;
+using System.Collections.Generic;
 using System.Collections.ObjectModel;
 using System.Collections.Specialized;
 using System.ComponentModel;
@@ -41,6 +42,19 @@ namespace HandyControl.Collections
             }
         }
 
+        public ManualObservableCollection()
+        {
+            
+        }
+
+        public ManualObservableCollection(List<T> list) : base(list != null ? new List<T>(list.Count) : list) => CopyFrom(list);
+
+        public ManualObservableCollection(IEnumerable<T> collection)
+        {
+            if (collection == null) throw new ArgumentNullException(nameof(collection));
+            CopyFrom(collection);
+        }
+
         protected override void OnPropertyChanged(PropertyChangedEventArgs e)
         {
             if (!CanNotify) return;
@@ -54,5 +68,18 @@ namespace HandyControl.Collections
 
             base.OnCollectionChanged(e);
         }
+
+        private void CopyFrom(IEnumerable<T> collection)
+        {
+            var items = Items;
+            if (collection != null)
+            {
+                using var enumerator = collection.GetEnumerator();
+                while (enumerator.MoveNext())
+                {
+                    items.Add(enumerator.Current);
+                }
+            }
+        }
     }
 }
diff --git a/src/Shared/HandyControl_Shared/Controls/Input/AutoCompleteTextBox/AutoCompleteTextBox.cs b/src/Shared/HandyControl_Shared/Controls/Input/AutoCompleteTextBox/AutoCompleteTextBox.cs
new file mode 100644
index 00000000..12ae0936
--- /dev/null
+++ b/src/Shared/HandyControl_Shared/Controls/Input/AutoCompleteTextBox/AutoCompleteTextBox.cs
@@ -0,0 +1,150 @@
+using System;
+using System.Windows;
+using System.Windows.Controls;
+using System.Windows.Input;
+using HandyControl.Data;
+using HandyControl.Tools.Helper;
+
+namespace HandyControl.Controls
+{
+    [TemplatePart(Name = SearchTextBox, Type = typeof(System.Windows.Controls.TextBox))]
+    public class AutoCompleteTextBox : ComboBox
+    {
+        private const string SearchTextBox = "PART_SearchTextBox";
+
+        private bool ignoreTextChanging;
+
+        private System.Windows.Controls.TextBox _searchTextBox;
+
+        private object _selectedItem;
+
+        static AutoCompleteTextBox()
+        {
+            TextProperty.OverrideMetadata(typeof(AutoCompleteTextBox), new FrameworkPropertyMetadata(default(string), FrameworkPropertyMetadataOptions.BindsTwoWayByDefault));
+        }
+
+        public override void OnApplyTemplate()
+        {
+            if (_searchTextBox != null)
+            {
+                _searchTextBox.GotFocus -= SearchTextBoxGotFocus;
+                _searchTextBox.KeyDown -= SearchTextBoxKeyDown;
+                _searchTextBox.TextChanged -= SearchTextBoxTextChanged;
+            }
+
+            base.OnApplyTemplate();
+
+            _searchTextBox = GetTemplateChild(SearchTextBox) as System.Windows.Controls.TextBox;
+            if (_searchTextBox != null)
+            {
+                _searchTextBox.GotFocus += SearchTextBoxGotFocus;
+                _searchTextBox.PreviewKeyDown += SearchTextBoxKeyDown;
+                _searchTextBox.TextChanged += SearchTextBoxTextChanged;
+            }
+        }
+
+        protected override void OnSelectionChanged(SelectionChangedEventArgs e)
+        {
+            if (e.AddedItems.Count > 0)
+            {
+                _selectedItem = e.AddedItems[0];
+            }
+        }
+
+        protected override void OnDropDownClosed(EventArgs e)
+        {
+            base.OnDropDownClosed(e);
+
+            if (ItemContainerGenerator.ContainerFromItem(_selectedItem) is AutoCompleteTextBoxItem boxItem)
+            {
+                ignoreTextChanging = true;
+
+                _searchTextBox.Text = BindingHelper.GetString(boxItem.Content, DisplayMemberPath);
+                _searchTextBox.CaretIndex = _searchTextBox.Text.Length;
+
+                ignoreTextChanging = true;
+
+                Text = _searchTextBox.Text;
+
+                ignoreTextChanging = false;
+            }
+        }
+
+        protected override bool IsItemItsOwnContainerOverride(object item) => item is AutoCompleteTextBoxItem;
+
+        protected override DependencyObject GetContainerForItemOverride() => new AutoCompleteTextBoxItem();
+
+        private void SearchTextBoxTextChanged(object sender, TextChangedEventArgs e)
+        {
+            _selectedItem = null;
+            SelectedIndex = -1;
+
+            if (ignoreTextChanging)
+            {
+                ignoreTextChanging = false;
+                return;
+            }
+
+            Text = _searchTextBox.Text;
+            if (string.IsNullOrEmpty(Text))
+            {
+                SetCurrentValue(IsDropDownOpenProperty, ValueBoxes.FalseBox);
+                _searchTextBox.Focus();
+            }
+            else if (_searchTextBox.IsFocused)
+            {
+                SetCurrentValue(IsDropDownOpenProperty, ValueBoxes.TrueBox);
+            }
+        }
+
+        private void SearchTextBoxKeyDown(object sender, KeyEventArgs e)
+        {
+            if (e.Key == Key.Up)
+            {
+                var index = SelectedIndex - 1;
+                if (index < 0)
+                {
+                    index = Items.Count - 1;
+                }
+
+                UpdateTextBoxBySelectedIndex(index);
+            }
+            else if (e.Key == Key.Down)
+            {
+                var index = SelectedIndex + 1;
+                if (index >= Items.Count)
+                {
+                    index = 0;
+                }
+
+                UpdateTextBoxBySelectedIndex(index);
+            }
+            else if (e.Key == Key.Enter)
+            {
+                SetCurrentValue(IsDropDownOpenProperty, ValueBoxes.FalseBox);
+                e.Handled = true;
+            }
+        }
+
+        private void UpdateTextBoxBySelectedIndex(int selectedIndex)
+        {
+            ignoreTextChanging = true;
+
+            if (ItemContainerGenerator.ContainerFromIndex(selectedIndex) is AutoCompleteTextBoxItem boxItem)
+            {
+                _searchTextBox.Text = BindingHelper.GetString(boxItem.Content, DisplayMemberPath);
+                _searchTextBox.CaretIndex = _searchTextBox.Text.Length;
+
+                SelectedIndex = selectedIndex;
+            }
+        }
+
+        private void SearchTextBoxGotFocus(object sender, RoutedEventArgs e)
+        {
+            if (!string.IsNullOrEmpty(Text))
+            {
+                SetCurrentValue(IsDropDownOpenProperty, ValueBoxes.TrueBox);
+            }
+        }
+    }
+}
diff --git a/src/Shared/HandyControl_Shared/Controls/Input/AutoCompleteTextBox/AutoCompleteTextBoxItem.cs b/src/Shared/HandyControl_Shared/Controls/Input/AutoCompleteTextBox/AutoCompleteTextBoxItem.cs
new file mode 100644
index 00000000..0d0819f6
--- /dev/null
+++ b/src/Shared/HandyControl_Shared/Controls/Input/AutoCompleteTextBox/AutoCompleteTextBoxItem.cs
@@ -0,0 +1,9 @@
+using System.Windows.Controls;
+
+namespace HandyControl.Controls
+{
+    public class AutoCompleteTextBoxItem : ComboBoxItem
+    {
+        
+    }
+}
diff --git a/src/Shared/HandyControl_Shared/HandyControl_Shared.projitems b/src/Shared/HandyControl_Shared/HandyControl_Shared.projitems
index da30695d..f3c8ac5d 100644
--- a/src/Shared/HandyControl_Shared/HandyControl_Shared.projitems
+++ b/src/Shared/HandyControl_Shared/HandyControl_Shared.projitems
@@ -35,6 +35,8 @@
     <Compile Include="$(MSBuildThisFileDirectory)Controls\Drawer\DrawerContainer.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Controls\Growl\GrowlWindow.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Controls\Image\ImageBlock.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)Controls\Input\AutoCompleteTextBox\AutoCompleteTextBox.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)Controls\Input\AutoCompleteTextBox\AutoCompleteTextBoxItem.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Controls\Input\CheckComboBox\CheckComboBox.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Controls\Input\CheckComboBox\CheckComboBoxItem.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Controls\Input\ImageSelector.cs" />
@@ -369,6 +371,7 @@
     <Compile Include="$(MSBuildThisFileDirectory)Tools\Generator\HatchBrushGenerator.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Tools\Helper\AnimationHelper.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Tools\Helper\ArithmeticHelper.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)Tools\Helper\BindingHelper.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Tools\Helper\ColorHelper.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Tools\Helper\ConfigHelper.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Tools\Helper\DesignerHelper.cs" />
@@ -416,6 +419,12 @@
     <None Include="$(MSBuildThisFileDirectory)Themes\Basic\Brushes.xaml">
       <SubType>Designer</SubType>
     </None>
+    <None Include="$(MSBuildThisFileDirectory)Themes\Styles\AutoCompleteTextBox.xaml">
+      <SubType>Designer</SubType>
+    </None>
+    <None Include="$(MSBuildThisFileDirectory)Themes\Styles\Base\AutoCompleteTextBoxBaseStyle.xaml">
+      <SubType>Designer</SubType>
+    </None>
     <None Include="$(MSBuildThisFileDirectory)Themes\XamlCombine.exe" />
     <Page Include="$(MSBuildThisFileDirectory)Themes\Basic\Colors\Colors.xaml">
       <SubType>Designer</SubType>
diff --git a/src/Shared/HandyControl_Shared/Themes/Styles/AutoCompleteTextBox.xaml b/src/Shared/HandyControl_Shared/Themes/Styles/AutoCompleteTextBox.xaml
new file mode 100644
index 00000000..2dea2090
--- /dev/null
+++ b/src/Shared/HandyControl_Shared/Themes/Styles/AutoCompleteTextBox.xaml
@@ -0,0 +1,6 @@
+<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+                    xmlns:hc="clr-namespace:HandyControl.Controls">
+
+    <Style BasedOn="{StaticResource AutoCompleteTextBoxBaseStyle}" TargetType="hc:AutoCompleteTextBox"/>
+
+</ResourceDictionary>
diff --git a/src/Shared/HandyControl_Shared/Themes/Styles/Base/AutoCompleteTextBoxBaseStyle.xaml b/src/Shared/HandyControl_Shared/Themes/Styles/Base/AutoCompleteTextBoxBaseStyle.xaml
new file mode 100644
index 00000000..73a19a2e
--- /dev/null
+++ b/src/Shared/HandyControl_Shared/Themes/Styles/Base/AutoCompleteTextBoxBaseStyle.xaml
@@ -0,0 +1,115 @@
+<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" 
+                    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" 
+                    xmlns:hc="clr-namespace:HandyControl.Controls">
+
+    <Style x:Key="AutoCompleteTextBoxInternal" BasedOn="{StaticResource ComboBoxEditableTextBox}" TargetType="TextBox"/>
+
+    <Style x:Key="AutoCompleteTextBoxItemBaseStyle" TargetType="ComboBoxItem">
+        <Setter Property="Padding" Value="{StaticResource DefaultControlPadding}"/>
+        <Setter Property="SnapsToDevicePixels" Value="True"/>
+        <Setter Property="Background" Value="Transparent"/>
+        <Setter Property="BorderBrush" Value="Transparent"/>
+        <Setter Property="BorderThickness" Value="0"/>
+        <Setter Property="MinHeight" Value="{StaticResource DefaultControlHeight}"/>
+        <Setter Property="Focusable" Value="False"/>
+        <Setter Property="FocusVisualStyle" Value="{x:Null}"/>
+        <Setter Property="Template">
+            <Setter.Value>
+                <ControlTemplate TargetType="ComboBoxItem">
+                    <Border x:Name="Bd" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" Background="{TemplateBinding Background}" Padding="{TemplateBinding Padding}" SnapsToDevicePixels="true">
+                        <ContentPresenter HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" VerticalAlignment="{TemplateBinding VerticalContentAlignment}"/>
+                    </Border>
+                    <ControlTemplate.Triggers>
+                        <MultiTrigger>
+                            <MultiTrigger.Conditions>
+                                <Condition Property="IsSelected" Value="False"/>
+                                <Condition Property="IsMouseOver" Value="True"/>
+                            </MultiTrigger.Conditions>
+                            <Setter Property="Background" TargetName="Bd" Value="{DynamicResource SecondaryRegionBrush}"/>
+                        </MultiTrigger>
+                        <Trigger Property="IsSelected" Value="True">
+                            <Setter Property="Background" TargetName="Bd" Value="{DynamicResource PrimaryBrush}"/>
+                            <Setter Property="Foreground" Value="White"/>
+                        </Trigger>
+                    </ControlTemplate.Triggers>
+                </ControlTemplate>
+            </Setter.Value>
+        </Setter>
+    </Style>
+
+    <Style x:Key="AutoCompleteTextBoxBaseStyle" TargetType="hc:AutoCompleteTextBox">
+        <Setter Property="FocusVisualStyle" Value="{x:Null}"/>
+        <Setter Property="Background" Value="{DynamicResource RegionBrush}"/>
+        <Setter Property="hc:BorderElement.CornerRadius" Value="{StaticResource DefaultCornerRadius}"/>
+        <Setter Property="BorderBrush" Value="{DynamicResource BorderBrush}"/>
+        <Setter Property="Foreground" Value="{DynamicResource PrimaryTextBrush}"/>
+        <Setter Property="BorderThickness" Value="1"/>
+        <Setter Property="ScrollViewer.HorizontalScrollBarVisibility" Value="Auto"/>
+        <Setter Property="ScrollViewer.VerticalScrollBarVisibility" Value="Auto"/>
+        <Setter Property="MinHeight" Value="{StaticResource DefaultControlHeight}"/>
+        <Setter Property="ScrollViewer.CanContentScroll" Value="true"/>
+        <Setter Property="ScrollViewer.PanningMode" Value="Both"/>
+        <Setter Property="Stylus.IsFlicksEnabled" Value="False"/>
+        <Setter Property="Padding" Value="{StaticResource DefaultInputPadding}"/>
+        <Setter Property="VerticalContentAlignment" Value="Center"/>
+        <Setter Property="Validation.ErrorTemplate" Value="{x:Null}"/>
+        <Setter Property="ItemContainerStyle" Value="{StaticResource AutoCompleteTextBoxItemBaseStyle}"/>
+        <Setter Property="IsTabStop" Value="false"/>
+        <Setter Property="hc:Empty.ShowEmpty" Value="True"/>
+        <Setter Property="Template">
+            <Setter.Value>
+                <ControlTemplate TargetType="hc:AutoCompleteTextBox">
+                    <hc:SimplePanel>
+                        <Border CornerRadius="{Binding Path=(hc:BorderElement.CornerRadius),RelativeSource={RelativeSource TemplatedParent}}" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" Background="{TemplateBinding Background}" SnapsToDevicePixels="true">
+                            <TextBox x:Name="PART_SearchTextBox" Padding="{TemplateBinding Padding}" Style="{StaticResource AutoCompleteTextBoxInternal}"/>
+                        </Border>
+                        <Popup x:Name="PART_Popup" AllowsTransparency="true" IsOpen="{Binding IsDropDownOpen, Mode=TwoWay, RelativeSource={RelativeSource TemplatedParent}}" Margin="1" PopupAnimation="{StaticResource {x:Static SystemParameters.ComboBoxPopupAnimationKey}}" Placement="Bottom">
+                            <Border BorderThickness="0,1,0,0" Effect="{StaticResource EffectShadow2}" Margin="8,0,8,8" CornerRadius="{Binding Path=(hc:BorderElement.CornerRadius),RelativeSource={RelativeSource TemplatedParent}}" x:Name="dropDownBorder" MinWidth="{Binding ActualWidth, ElementName=toggleButton}" MaxHeight="{TemplateBinding MaxDropDownHeight}" BorderBrush="{DynamicResource BorderBrush}" Background="{DynamicResource RegionBrush}">
+                                <hc:ToggleBlock IsChecked="{Binding HasItems,RelativeSource={RelativeSource TemplatedParent},Mode=OneWay}" VerticalContentAlignment="Stretch" HorizontalContentAlignment="Stretch">
+                                    <hc:ToggleBlock.CheckedContent>
+                                        <ScrollViewer Margin="0,4">
+                                            <ItemsPresenter x:Name="ItemsPresenter" KeyboardNavigation.DirectionalNavigation="Contained" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"/>
+                                        </ScrollViewer>
+                                    </hc:ToggleBlock.CheckedContent>
+                                    <hc:ToggleBlock.UnCheckedContent>
+                                        <hc:Empty/>
+                                    </hc:ToggleBlock.UnCheckedContent>
+                                </hc:ToggleBlock>
+                            </Border>
+                        </Popup>
+                    </hc:SimplePanel>
+                    <ControlTemplate.Triggers>
+                        <Trigger Property="HasItems" Value="false">
+                            <Setter Property="Height" TargetName="dropDownBorder" Value="95"/>
+                        </Trigger>
+                        <Trigger Property="hc:DropDownElement.ConsistentWidth" Value="True">
+                            <Setter Property="MaxWidth" TargetName="dropDownBorder" Value="{Binding ActualWidth, ElementName=PART_SearchTextBox}"/>
+                            <Setter Property="MinWidth" TargetName="dropDownBorder" Value="{Binding ActualWidth, ElementName=PART_SearchTextBox}"/>
+                        </Trigger>
+                        <Trigger Property="hc:DropDownElement.AutoWidth" Value="True">
+                            <Setter Property="MaxWidth" TargetName="dropDownBorder" Value="{x:Static system:Double.MaxValue}" />
+                            <Setter Property="MinWidth" TargetName="dropDownBorder" Value="{Binding ActualHeight, ElementName=PART_SearchTextBox}" />
+                        </Trigger>
+                        <Trigger Property="IsMouseOver" Value="true" SourceName="PART_SearchTextBox">
+                            <Setter Property="BorderBrush" Value="{DynamicResource SecondaryBorderBrush}"/>
+                        </Trigger>
+                        <MultiTrigger>
+                            <MultiTrigger.Conditions>
+                                <Condition Property="IsMouseOver" Value="true"/>
+                                <Condition Property="IsFocused" Value="false" SourceName="PART_SearchTextBox"/>
+                            </MultiTrigger.Conditions>
+                            <Setter Property="BorderBrush" Value="{DynamicResource SecondaryBorderBrush}"/>
+                        </MultiTrigger>
+                        <Trigger Property="IsFocused" Value="True" SourceName="PART_SearchTextBox">
+                            <Setter Property="BorderBrush" Value="{DynamicResource PrimaryBrush}"/>
+                        </Trigger>
+                        <Trigger Property="IsEnabled" Value="false">
+                            <Setter Property="Opacity" Value="0.4"/>
+                        </Trigger>
+                    </ControlTemplate.Triggers>
+                </ControlTemplate>
+            </Setter.Value>
+        </Setter>
+    </Style>
+
+</ResourceDictionary>
diff --git a/src/Shared/HandyControl_Shared/Themes/Theme.xaml b/src/Shared/HandyControl_Shared/Themes/Theme.xaml
index c8fd75a4..3623a01e 100644
--- a/src/Shared/HandyControl_Shared/Themes/Theme.xaml
+++ b/src/Shared/HandyControl_Shared/Themes/Theme.xaml
@@ -11383,6 +11383,113 @@
 			</Setter.Value>
 		</Setter>
 	</Style>
+	<Style x:Key="AutoCompleteTextBoxInternal" BasedOn="{StaticResource ComboBoxEditableTextBox}" TargetType="TextBox" />
+	<Style x:Key="AutoCompleteTextBoxItemBaseStyle" TargetType="ComboBoxItem">
+		<Setter Property="Padding" Value="{StaticResource DefaultControlPadding}" />
+		<Setter Property="SnapsToDevicePixels" Value="True" />
+		<Setter Property="Background" Value="Transparent" />
+		<Setter Property="BorderBrush" Value="Transparent" />
+		<Setter Property="BorderThickness" Value="0" />
+		<Setter Property="MinHeight" Value="{StaticResource DefaultControlHeight}" />
+		<Setter Property="Focusable" Value="False" />
+		<Setter Property="FocusVisualStyle" Value="{x:Null}" />
+		<Setter Property="Template">
+			<Setter.Value>
+				<ControlTemplate TargetType="ComboBoxItem">
+					<Border x:Name="Bd" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" Background="{TemplateBinding Background}" Padding="{TemplateBinding Padding}" SnapsToDevicePixels="true">
+						<ContentPresenter HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" VerticalAlignment="{TemplateBinding VerticalContentAlignment}" />
+					</Border>
+					<ControlTemplate.Triggers>
+						<MultiTrigger>
+							<MultiTrigger.Conditions>
+								<Condition Property="IsSelected" Value="False" />
+								<Condition Property="IsMouseOver" Value="True" />
+							</MultiTrigger.Conditions>
+							<Setter Property="Background" TargetName="Bd" Value="{DynamicResource SecondaryRegionBrush}" />
+						</MultiTrigger>
+						<Trigger Property="IsSelected" Value="True">
+							<Setter Property="Background" TargetName="Bd" Value="{DynamicResource PrimaryBrush}" />
+							<Setter Property="Foreground" Value="White" />
+						</Trigger>
+					</ControlTemplate.Triggers>
+				</ControlTemplate>
+			</Setter.Value>
+		</Setter>
+	</Style>
+	<Style x:Key="AutoCompleteTextBoxBaseStyle" TargetType="hc:AutoCompleteTextBox">
+		<Setter Property="FocusVisualStyle" Value="{x:Null}" />
+		<Setter Property="Background" Value="{DynamicResource RegionBrush}" />
+		<Setter Property="hc:BorderElement.CornerRadius" Value="{StaticResource DefaultCornerRadius}" />
+		<Setter Property="BorderBrush" Value="{DynamicResource BorderBrush}" />
+		<Setter Property="Foreground" Value="{DynamicResource PrimaryTextBrush}" />
+		<Setter Property="BorderThickness" Value="1" />
+		<Setter Property="ScrollViewer.HorizontalScrollBarVisibility" Value="Auto" />
+		<Setter Property="ScrollViewer.VerticalScrollBarVisibility" Value="Auto" />
+		<Setter Property="MinHeight" Value="{StaticResource DefaultControlHeight}" />
+		<Setter Property="ScrollViewer.CanContentScroll" Value="true" />
+		<Setter Property="ScrollViewer.PanningMode" Value="Both" />
+		<Setter Property="Stylus.IsFlicksEnabled" Value="False" />
+		<Setter Property="Padding" Value="{StaticResource DefaultInputPadding}" />
+		<Setter Property="VerticalContentAlignment" Value="Center" />
+		<Setter Property="Validation.ErrorTemplate" Value="{x:Null}" />
+		<Setter Property="ItemContainerStyle" Value="{StaticResource AutoCompleteTextBoxItemBaseStyle}" />
+		<Setter Property="IsTabStop" Value="false" />
+		<Setter Property="hc:Empty.ShowEmpty" Value="True" />
+		<Setter Property="Template">
+			<Setter.Value>
+				<ControlTemplate TargetType="hc:AutoCompleteTextBox">
+					<hc:SimplePanel>
+						<Border CornerRadius="{Binding Path=(hc:BorderElement.CornerRadius),RelativeSource={RelativeSource TemplatedParent}}" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" Background="{TemplateBinding Background}" SnapsToDevicePixels="true">
+							<TextBox x:Name="PART_SearchTextBox" Padding="{TemplateBinding Padding}" Style="{StaticResource AutoCompleteTextBoxInternal}" />
+						</Border>
+						<Popup x:Name="PART_Popup" AllowsTransparency="true" IsOpen="{Binding IsDropDownOpen, Mode=TwoWay, RelativeSource={RelativeSource TemplatedParent}}" Margin="1" PopupAnimation="{StaticResource {x:Static SystemParameters.ComboBoxPopupAnimationKey}}" Placement="Bottom">
+							<Border BorderThickness="0,1,0,0" Effect="{StaticResource EffectShadow2}" Margin="8,0,8,8" CornerRadius="{Binding Path=(hc:BorderElement.CornerRadius),RelativeSource={RelativeSource TemplatedParent}}" x:Name="dropDownBorder" MinWidth="{Binding ActualWidth, ElementName=toggleButton}" MaxHeight="{TemplateBinding MaxDropDownHeight}" BorderBrush="{DynamicResource BorderBrush}" Background="{DynamicResource RegionBrush}">
+								<hc:ToggleBlock IsChecked="{Binding HasItems,RelativeSource={RelativeSource TemplatedParent},Mode=OneWay}" VerticalContentAlignment="Stretch" HorizontalContentAlignment="Stretch">
+									<hc:ToggleBlock.CheckedContent>
+										<ScrollViewer Margin="0,4">
+											<ItemsPresenter x:Name="ItemsPresenter" KeyboardNavigation.DirectionalNavigation="Contained" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" />
+										</ScrollViewer>
+									</hc:ToggleBlock.CheckedContent>
+									<hc:ToggleBlock.UnCheckedContent>
+										<hc:Empty />
+									</hc:ToggleBlock.UnCheckedContent>
+								</hc:ToggleBlock>
+							</Border>
+						</Popup>
+					</hc:SimplePanel>
+					<ControlTemplate.Triggers>
+						<Trigger Property="HasItems" Value="false">
+							<Setter Property="Height" TargetName="dropDownBorder" Value="95" />
+						</Trigger>
+						<Trigger Property="hc:DropDownElement.ConsistentWidth" Value="True">
+							<Setter Property="MaxWidth" TargetName="dropDownBorder" Value="{Binding ActualWidth, ElementName=PART_SearchTextBox}" />
+							<Setter Property="MinWidth" TargetName="dropDownBorder" Value="{Binding ActualWidth, ElementName=PART_SearchTextBox}" />
+						</Trigger>
+						<Trigger Property="hc:DropDownElement.AutoWidth" Value="True">
+							<Setter Property="MaxWidth" TargetName="dropDownBorder" Value="{x:Static system:Double.MaxValue}" />
+							<Setter Property="MinWidth" TargetName="dropDownBorder" Value="{Binding ActualHeight, ElementName=PART_SearchTextBox}" />
+						</Trigger>
+						<Trigger Property="IsMouseOver" Value="true" SourceName="PART_SearchTextBox">
+							<Setter Property="BorderBrush" Value="{DynamicResource SecondaryBorderBrush}" />
+						</Trigger>
+						<MultiTrigger>
+							<MultiTrigger.Conditions>
+								<Condition Property="IsMouseOver" Value="true" />
+								<Condition Property="IsFocused" Value="false" SourceName="PART_SearchTextBox" />
+							</MultiTrigger.Conditions>
+							<Setter Property="BorderBrush" Value="{DynamicResource SecondaryBorderBrush}" />
+						</MultiTrigger>
+						<Trigger Property="IsFocused" Value="True" SourceName="PART_SearchTextBox">
+							<Setter Property="BorderBrush" Value="{DynamicResource PrimaryBrush}" />
+						</Trigger>
+						<Trigger Property="IsEnabled" Value="false">
+							<Setter Property="Opacity" Value="0.4" />
+						</Trigger>
+					</ControlTemplate.Triggers>
+				</ControlTemplate>
+			</Setter.Value>
+		</Setter>
+	</Style>
 	<Style BasedOn="{StaticResource BadgeBaseStyle}" TargetType="hc:Badge">
 		<Setter Property="Foreground" Value="{DynamicResource PrimaryTextBrush}" />
 	</Style>
@@ -13028,6 +13135,7 @@
 	<Style BasedOn="{StaticResource TreeViewItemBaseStyle}" TargetType="TreeViewItem" />
 	<Style BasedOn="{StaticResource TreeViewBaseStyle}" TargetType="TreeView" />
 	<Style BasedOn="{StaticResource WatermarkBaseStyle}" TargetType="hc:Watermark" />
+	<Style BasedOn="{StaticResource AutoCompleteTextBoxBaseStyle}" TargetType="hc:AutoCompleteTextBox" />
 	<ControlTemplate x:Key="TipSliderThumbHorizontalTop" TargetType="Thumb">
 		<hc:AxleCanvas>
 			<Label Name="LabelValue" IsHitTestVisible="False" Opacity="0" Canvas.Bottom="28" Style="{StaticResource LabelPrimary}" Content="{Binding Value,RelativeSource={RelativeSource AncestorType=Slider}}" ContentStringFormat="{Binding Path=(hc:TipElement.StringFormat),RelativeSource={RelativeSource AncestorType=Slider}}" />
diff --git a/src/Shared/HandyControl_Shared/Themes/Theme_40.txt b/src/Shared/HandyControl_Shared/Themes/Theme_40.txt
index d4772aff..f35f236a 100644
--- a/src/Shared/HandyControl_Shared/Themes/Theme_40.txt
+++ b/src/Shared/HandyControl_Shared/Themes/Theme_40.txt
@@ -116,6 +116,7 @@ Styles\Base\ToolTipBaseStyle.xaml
 Styles\Base\TransferBaseStyle.xaml
 ..\..\..\Net_40\HandyControl_Net_40\Themes\Styles\Base\TreeViewBaseStyle.xaml
 Styles\Base\WatermarkBaseStyle.xaml
+Styles\Base\AutoCompleteTextBoxBaseStyle.xaml
 # --------------------------------------
 Styles\Badge.xaml
 Styles\CalendarWithClock.xaml
@@ -183,3 +184,4 @@ Styles\Transfer.xaml
 Styles\TransitioningContentControl.xaml
 Styles\TreeView.xaml
 Styles\Watermark.xaml
+Styles\AutoCompleteTextBox.xaml
diff --git a/src/Shared/HandyControl_Shared/Themes/Theme_GE45.txt b/src/Shared/HandyControl_Shared/Themes/Theme_GE45.txt
index 9e629efc..203dca6a 100644
--- a/src/Shared/HandyControl_Shared/Themes/Theme_GE45.txt
+++ b/src/Shared/HandyControl_Shared/Themes/Theme_GE45.txt
@@ -116,6 +116,7 @@ Styles\Base\ToolTipBaseStyle.xaml
 Styles\Base\TransferBaseStyle.xaml
 Styles\Base\TreeViewBaseStyle.xaml
 Styles\Base\WatermarkBaseStyle.xaml
+Styles\Base\AutoCompleteTextBoxBaseStyle.xaml
 # --------------------------------------
 Styles\Badge.xaml
 Styles\CalendarWithClock.xaml
@@ -183,3 +184,4 @@ Styles\Transfer.xaml
 Styles\TransitioningContentControl.xaml
 Styles\TreeView.xaml
 Styles\Watermark.xaml
+Styles\AutoCompleteTextBox.xaml
diff --git a/src/Shared/HandyControl_Shared/Tools/Helper/BindingHelper.cs b/src/Shared/HandyControl_Shared/Tools/Helper/BindingHelper.cs
new file mode 100644
index 00000000..5a2936bb
--- /dev/null
+++ b/src/Shared/HandyControl_Shared/Tools/Helper/BindingHelper.cs
@@ -0,0 +1,31 @@
+using System.Windows;
+using System.Windows.Controls;
+using System.Windows.Data;
+
+namespace HandyControl.Tools.Helper
+{
+    public class BindingHelper
+    {
+        public static string GetString(object source, string path)
+        {
+            if (string.IsNullOrEmpty(path))
+            {
+                return source == null ? string.Empty : source.ToString();
+            }
+
+            var tempObj = new DependencyObject();
+
+            var binding = new Binding(path)
+            {
+                Mode = BindingMode.OneTime,
+                Source = source
+            };
+
+            BindingOperations.SetBinding(tempObj, TextSearch.TextProperty, binding);
+            var result = (string) tempObj.GetValue(TextSearch.TextProperty);
+
+            BindingOperations.ClearBinding(tempObj, TextSearch.TextProperty);
+            return result;
+        }
+    }
+}