ShrlAlgoToolkit/Melskin/Controls/AutoComplete.xaml

<ResourceDictionary
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:assists="clr-namespace:Melskin.Assists"
    xmlns:controls="clr-namespace:Melskin.Controls"
    xmlns:converters="clr-namespace:Melskin.Converters"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
    <!--<ResourceDictionary.MergedDictionaries>
        <ResourceDictionary Source="FlattenTextBox.xaml" />
    </ResourceDictionary.MergedDictionaries>-->

    <Style TargetType="{x:Type controls:AutoComplete}">
        <Setter Property="assists:InputAssist.PlaceholderText" Value="请输入..." />
        <Setter Property="assists:InputAssist.Clearable" Value="True" />
        <Setter Property="Template">
            <Setter.Value>
                <ControlTemplate TargetType="{x:Type controls:AutoComplete}">
                    <Grid>
                        <TextBox
                            Text="{Binding Text, RelativeSource={RelativeSource TemplatedParent}, UpdateSourceTrigger=PropertyChanged}"
                            assists:InputAssist.Clearable="{TemplateBinding assists:InputAssist.Clearable}"
                            assists:InputAssist.PlaceholderText="{TemplateBinding assists:InputAssist.PlaceholderText}"
                            x:Name="PART_TextBox" />
                        <Popup
                            AllowsTransparency="True"
                            IsOpen="{Binding IsDropDownOpen, RelativeSource={RelativeSource TemplatedParent}}"
                            MinWidth="{Binding ActualWidth, ElementName=PART_TextBox}"
                            PlacementTarget="{Binding ElementName=PART_TextBox}"
                            PopupAnimation="Slide"
                            StaysOpen="True"
                            assists:BehaviorAssist.SimulateNativeBehavior="True"
                            x:Name="PART_Popup">
                            <Border
                                Background="{DynamicResource BackgroundFloatingBrush}"
                                BorderBrush="{DynamicResource BorderNormalBrush}"
                                BorderThickness="1"
                                CornerRadius="6"
                                Effect="{DynamicResource PopupShadow}"
                                Margin="0,8,0,0"
                                MinHeight="30">
                                <!--<Border.Effect>
                                    <DropShadowEffect
                                        BlurRadius="10"
                                        Opacity="0.1"
                                        ShadowDepth="0"
                                        Color="Black" />
                                </Border.Effect>-->
                                <ListBox
                                    BorderThickness="0"
                                    ItemsSource="{Binding ItemsSource, RelativeSource={RelativeSource TemplatedParent}}"
                                    x:Name="PART_ListBox">
                                    <ListBox.ItemContainerStyle>
                                        <Style TargetType="ListBoxItem">
                                            <Setter Property="Padding" Value="12,5,12,5" />
                                            <Setter Property="Template">
                                                <Setter.Value>
                                                    <ControlTemplate TargetType="ListBoxItem">
                                                        <Border
                                                            Background="{TemplateBinding Background}"
                                                            Padding="{TemplateBinding Padding}"
                                                            SnapsToDevicePixels="true"
                                                            x:Name="Bd">
                                                            <ContentPresenter
                                                                HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}"
                                                                SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"
                                                                VerticalAlignment="{TemplateBinding VerticalContentAlignment}" />
                                                        </Border>
                                                        <ControlTemplate.Triggers>
                                                            <Trigger Property="IsMouseOver" Value="true">
                                                                <Setter Property="Background" TargetName="Bd" Value="{DynamicResource ControlBackgroundHoverBrush}" />
                                                            </Trigger>
                                                            <Trigger Property="IsSelected" Value="true">
                                                                <Setter Property="Background" TargetName="Bd" Value="{DynamicResource ControlBackgroundSelectedBrush}" />
                                                            </Trigger>
                                                        </ControlTemplate.Triggers>
                                                    </ControlTemplate>
                                                </Setter.Value>
                                            </Setter>
                                        </Style>
                                    </ListBox.ItemContainerStyle>
                                    <ListBox.ItemTemplate>
                                        <DataTemplate>
                                            <ContentPresenter>
                                                <ContentPresenter.Content>
                                                    <MultiBinding Converter="{x:Static converters:StringMatchConverter.Instance}">
                                                        <Binding />
                                                        <Binding Path="Text" RelativeSource="{RelativeSource AncestorType=controls:AutoComplete}" />
                                                    </MultiBinding>
                                                </ContentPresenter.Content>
                                            </ContentPresenter>
                                        </DataTemplate>
                                    </ListBox.ItemTemplate>
                                </ListBox>
                            </Border>
                        </Popup>
                    </Grid>
                </ControlTemplate>
            </Setter.Value>
        </Setter>
    </Style>
</ResourceDictionary>