<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
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xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
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<!-- 定义 ComboBox 的样式 -->
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<Style x:Key="ShowTextCombox" TargetType="ComboBox">
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<Setter Property="IsEditable" Value="True"/>
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<Setter Property="Template">
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<Setter.Value>
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<ControlTemplate TargetType="ComboBox">
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<Grid>
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<!-- 下拉按钮 -->
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<ToggleButton x:Name="ToggleButton" Grid.Column="2" Focusable="false" ClickMode="Press"
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FontSize="16"
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HorizontalContentAlignment="Stretch"
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IsChecked="{Binding IsDropDownOpen, Mode=TwoWay, RelativeSource={RelativeSource TemplatedParent}}">
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<Grid>
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<Grid.RowDefinitions>
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<RowDefinition />
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</Grid.RowDefinitions>
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<Grid.ColumnDefinitions>
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<ColumnDefinition Width="*"/>
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<ColumnDefinition Width="20"/>
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</Grid.ColumnDefinitions>
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<TextBlock Grid.Row="0" Grid.Column="0" Padding="3,1,0,1" TextAlignment="Left" Text="{TemplateBinding Text}" />
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<Path Grid.Row="0" Grid.Column="1" Data="M 5,6 L 10,11 L 15,6" Stroke="Black" StrokeThickness="1"/>
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</Grid>
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</ToggleButton>
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<!-- 弹出内容 -->
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<Popup x:Name="Popup" IsOpen="{TemplateBinding IsDropDownOpen}" Placement="Bottom" Focusable="false" AllowsTransparency="True" PopupAnimation="Slide">
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<Grid Name="DropDown" SnapsToDevicePixels="True" MinWidth="{TemplateBinding ActualWidth}" MaxHeight="{TemplateBinding MaxDropDownHeight}">
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<Border x:Name="DropDownBorder" Background="White" BorderThickness="1" BorderBrush="Black"/>
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<ScrollViewer SnapsToDevicePixels="True">
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<StackPanel IsItemsHost="True" KeyboardNavigation.DirectionalNavigation="Contained"/>
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</ScrollViewer>
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</Grid>
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</Popup>
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</Grid>
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<ControlTemplate.Triggers>
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<Trigger Property="IsKeyboardFocusWithin" Value="True">
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<Setter Property="IsDropDownOpen" Value="True"/>
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</Trigger>
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</ControlTemplate.Triggers>
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</ControlTemplate>
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</Setter.Value>
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</Setter>
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</Style>
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</ResourceDictionary>
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