wpf 列表、菜单 收起与展开，通过Grid DoubleAnimation或者Expander实现

菜单收缩有很多种方法具体如何实现还是看个人想法：

第一种通过后台控制收起与展开：

效果图：

代码 ：

<Grid>
        <Grid.ColumnDefinitions>
            <ColumnDefinition x:Name="/>
            <ColumnDefinition />
        </Grid.ColumnDefinitions>
        <Grid>
            <Grid x:Name="ListMenu" Background="#070607" Focusable="False">

            </Grid>
        </Grid>
        <Grid Grid.Column=" Background="#211E1E">
            <Grid.ColumnDefinitions>
                <ColumnDefinition Width="/>
                <ColumnDefinition Width="*"/>
            </Grid.ColumnDefinitions>
            <Grid  Background="#211E1E">
                <Border Height=" Margin="-6,0,0,0" Background="#070607"
                        MouseLeftButtonDown="No_MouseLeftButtonDown" ToolTip="展开">
                    <Border Height="  Margin="-2,0,0,0">
                        <Border.Background>
                            <ImageBrush ImageSource="/Image/Open.png"/>
                        </Border.Background>
                    </Border>
                </Border>
            </Grid>
            <Grid Grid.Column=">

            </Grid>
        </Grid>
    </Grid>

后台定义：

 private DoubleAnimation c_daListAnimation;
        public bool c_bState = true;//记录菜单栏状态 false隐藏 true显示

主窗体Loaded和border的MouseLeftButtonDown事件

 void Window1_Loaded(object sender, RoutedEventArgs e)
        {
            c_daListAnimation = new DoubleAnimation();

        }

 private void No_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
        {
            if (c_bState)
            {

                c_bState = false;
                c_daListAnimation.From = ;
                c_daListAnimation.To = -;
                cd.Width = );
            }
            else
            {
                c_bState = true;
                c_daListAnimation.From = -;
                c_daListAnimation.To = ;
                cd.Width = );
            }

        }

第二种实现方法是通过Expander修改模板实现（效果图如下）

效果图：

修改后台模板代码：

<SolidColorBrush x:Key="Expander.MouseOver.Circle.Stroke" Color="#FF3C7FB1"/>
        <SolidColorBrush x:Key="Expander.MouseOver.Circle.Fill" Color="Transparent"/>
        <SolidColorBrush x:Key="Expander.MouseOver.Arrow.Stroke" Color="#222"/>
        <SolidColorBrush x:Key="Expander.Pressed.Circle.Stroke" Color="#FF526C7B"/>
        <SolidColorBrush x:Key="Expander.Pressed.Circle.Fill" Color="Transparent"/>
        <SolidColorBrush x:Key="Expander.Pressed.Arrow.Stroke" Color="#FF003366"/>
        <SolidColorBrush x:Key="Expander.Disabled.Circle.Stroke" Color="DarkGray"/>
        <SolidColorBrush x:Key="Expander.Disabled.Circle.Fill" Color="Transparent"/>
        <SolidColorBrush x:Key="Expander.Disabled.Arrow.Stroke" Color="#666"/>
        <SolidColorBrush x:Key="Expander.Static.Circle.Fill" Color="Transparent"/>
        <SolidColorBrush x:Key="Expander.Static.Circle.Stroke" Color="DarkGray"/>
        <SolidColorBrush x:Key="Expander.Static.Arrow.Stroke" Color="#666"/>
        <Style x:Key="ExpanderRightHeaderStyle" TargetType="{x:Type ToggleButton}">
            <Setter Property="Template">
                <Setter.Value>
                    <ControlTemplate TargetType="{x:Type ToggleButton}">
                        <Border Padding="{TemplateBinding Padding}">
                            <Grid Background="Transparent" SnapsToDevicePixels="False">

                                <Grid>
                                    <Grid.LayoutTransform>
                                        <TransformGroup>
                                            <TransformGroup.Children>
                                                <TransformCollection>
                                                    <RotateTransform Angle="/>
                                                </TransformCollection>
                                            </TransformGroup.Children>
                                        </TransformGroup>
                                    </Grid.LayoutTransform>
                                    <Rectangle x:Name="/>
                                    <Path x:Name=" VerticalAlignment="Center"/>
                                </Grid>
                                <ContentPresenter HorizontalAlignment=" RecognizesAccessKey="True" SnapsToDevicePixels="True" VerticalAlignment="Top"/>

                            </Grid>
                        </Border>
                        <ControlTemplate.Triggers>
                            <Trigger Property="IsChecked" Value="true">
                                <Setter Property="Data" TargetName="arrow" Value="M 1,4.5  L 4.5,1  L 8,4.5"/>
                            </Trigger>
                            <Trigger Property="IsMouseOver" Value="true">
                                <Setter Property="Stroke" TargetName="circle" Value="{StaticResource Expander.MouseOver.Circle.Stroke}"/>
                                <Setter Property="Fill" TargetName="circle" Value="{StaticResource Expander.MouseOver.Circle.Fill}"/>
                                <Setter Property="Stroke" TargetName="arrow" Value="{StaticResource Expander.MouseOver.Arrow.Stroke}"/>
                            </Trigger>
                            <Trigger Property="IsPressed" Value="true">
                                <Setter Property="StrokeThickness" TargetName="arrow" Value="1.5"/>
                            </Trigger>
                            <Trigger Property="IsEnabled" Value="false">
                                <Setter Property="Stroke" TargetName="circle" Value="{StaticResource Expander.Disabled.Circle.Stroke}"/>
                                <Setter Property="Fill" TargetName="circle" Value="{StaticResource Expander.Disabled.Circle.Fill}"/>
                                <Setter Property="Stroke" TargetName="arrow" Value="{StaticResource Expander.Disabled.Arrow.Stroke}"/>
                            </Trigger>
                        </ControlTemplate.Triggers>
                    </ControlTemplate>
                </Setter.Value>
            </Setter>
        </Style>

        <Style x:Key="ExpanderLeftHeaderStyle" TargetType="{x:Type ToggleButton}">
            <Setter Property="Template">
                <Setter.Value>
                    <ControlTemplate TargetType="{x:Type ToggleButton}">
                        <Border Padding="{TemplateBinding Padding}">
                            <Grid Background="Transparent" SnapsToDevicePixels="False">

                                <Grid>
                                    <Grid.LayoutTransform>
                                        <TransformGroup>
                                            <TransformGroup.Children>
                                                <TransformCollection>
                                                    <RotateTransform Angle="/>
                                                </TransformCollection>
                                            </TransformGroup.Children>
                                        </TransformGroup>
                                    </Grid.LayoutTransform>
                                    <Rectangle x:Name="/>
                                    <Path x:Name=" VerticalAlignment="Center"/>
                                </Grid>
                                <ContentPresenter HorizontalAlignment=" RecognizesAccessKey="True" SnapsToDevicePixels="True" VerticalAlignment="Top"/>

                            </Grid>
                        </Border>
                        <ControlTemplate.Triggers>
                            <Trigger Property="IsChecked" Value="true">
                                <Setter Property="Data" TargetName="arrow" Value="M 1,1.5 L 4.5,5 L 8,1.5"/>
                            </Trigger>
                            <Trigger Property="IsMouseOver" Value="true">
                                <Setter Property="Stroke" TargetName="circle" Value="{StaticResource Expander.MouseOver.Circle.Stroke}"/>
                                <Setter Property="Fill" TargetName="circle" Value="{StaticResource Expander.MouseOver.Circle.Fill}"/>
                                <Setter Property="Stroke" TargetName="arrow" Value="{StaticResource Expander.MouseOver.Arrow.Stroke}"/>
                            </Trigger>
                            <Trigger Property="IsPressed" Value="true">
                                <Setter Property="StrokeThickness" TargetName="arrow" Value="1.5"/>

                            </Trigger>
                            <Trigger Property="IsEnabled" Value="false">
                                <Setter Property="Stroke" TargetName="circle" Value="{StaticResource Expander.Disabled.Circle.Stroke}"/>
                                <Setter Property="Fill" TargetName="circle" Value="{StaticResource Expander.Disabled.Circle.Fill}"/>
                                <Setter Property="Stroke" TargetName="arrow" Value="{StaticResource Expander.Disabled.Arrow.Stroke}"/>
                            </Trigger>
                        </ControlTemplate.Triggers>
                    </ControlTemplate>
                </Setter.Value>
            </Setter>
        </Style>
        <Style x:Key="ExpanderHeaderFocusVisual">
            <Setter Property="Control.Template">
                <Setter.Value>
                    <ControlTemplate>
                        <Border>
                            <Rectangle Margin=" StrokeDashArray="1 2"/>
                        </Border>
                    </ControlTemplate>
                </Setter.Value>
            </Setter>
        </Style>

        <Style x:Key="ExpanderStyle1" TargetType="{x:Type Expander}">
            <Setter Property="Foreground" Value="{DynamicResource {x:Static SystemColors.ControlTextBrushKey}}"/>
            <Setter Property="Background" Value="Transparent"/>
            <Setter Property="HorizontalContentAlignment" Value="Stretch"/>
            <Setter Property="VerticalContentAlignment" Value="Stretch"/>
            <Setter Property="BorderBrush" Value="Transparent"/>
            <Setter Property="/>
            <Setter Property="Template">
                <Setter.Value>
                    <ControlTemplate TargetType="{x:Type Expander}">
                        <Border BorderBrush=" SnapsToDevicePixels="true">
                            <DockPanel>
                                <ToggleButton x:Name="HeaderSite"
                                    ContentTemplate="{TemplateBinding HeaderTemplate}"
                                    ContentTemplateSelector="{TemplateBinding HeaderTemplateSelector}"
                                    Content="{TemplateBinding Header}" DockPanel.Dock="Top"
                                    Foreground="{TemplateBinding Foreground}" FontWeight="{TemplateBinding FontWeight}"
                                    FocusVisualStyle="{StaticResource ExpanderHeaderFocusVisual}" FontStyle="{TemplateBinding FontStyle}"
                                    FontStretch="{TemplateBinding FontStretch}" FontSize="{TemplateBinding FontSize}"
                                    FontFamily="{TemplateBinding FontFamily}"
                                    HorizontalContentAlignment="{TemplateBinding HorizontalContentAlignment}"
                                    IsChecked="{Binding IsExpanded, Mode=TwoWay, RelativeSource={RelativeSource TemplatedParent}}"
                                    Margin=" Padding="{TemplateBinding Padding}"
                                    Style="{StaticResource ExpanderLeftHeaderStyle}"
                                    VerticalContentAlignment="{TemplateBinding VerticalContentAlignment}"/>
                                <ContentPresenter x:Name="ExpandSite" DockPanel.Dock="Bottom" Focusable="false" HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}" Margin="{TemplateBinding Padding}" Visibility="Collapsed" VerticalAlignment="{TemplateBinding VerticalContentAlignment}"/>
                            </DockPanel>
                        </Border>
                        <ControlTemplate.Triggers>
                            <Trigger Property="IsExpanded" Value="true">
                                <Setter Property="Visibility" TargetName="ExpandSite" Value="Visible"/>
                            </Trigger>
                            <Trigger Property="ExpandDirection" Value="Right">
                                <Setter Property="DockPanel.Dock" TargetName="ExpandSite" Value="Right"/>
                                <Setter Property="DockPanel.Dock" TargetName="HeaderSite" Value="Left"/>
                                <Setter Property="Style" TargetName="HeaderSite" Value="{StaticResource ExpanderRightHeaderStyle}"/>
                            </Trigger>
                            <Trigger Property="IsEnabled" Value="false">
                                <Setter Property="Foreground" Value="{DynamicResource {x:Static SystemColors.GrayTextBrushKey}}"/>
                            </Trigger>
                        </ControlTemplate.Triggers>
                    </ControlTemplate>
                </Setter.Value>
            </Setter>
        </Style>

expander（button样式自己写吧）

<Expander  ExpandDirection=" Style="{DynamicResource ExpanderStyle1}" IsExpanded="True">
            <DockPanel Background="#FF5750">
                <Image DockPanel.Dock=" Margin="10,20"/>
                <Button DockPanel.Dock="Top" Foreground="White" Template="{StaticResource IconButtonTemplate}" Margin="0,2">
                    <Button.Content>

                        <StackPanel Orientation="Horizontal" Margin="20,0">
                            <Image Source="/>
                            <TextBlock Margin="15,0" VerticalAlignment="Center" Text="消息列表"/>
                        </StackPanel>
                    </Button.Content>
                </Button>
                <Button DockPanel.Dock="Top" Foreground="White" Template="{StaticResource IconButtonTemplate}" Margin="0,2">
                    <Button.Content>
                        <StackPanel Orientation="Horizontal" Margin="20,0">
                            <Image Source="/>
                            <TextBlock Margin="15,0" VerticalAlignment="Center" Text="所有应用"/>
                        </StackPanel>
                    </Button.Content>
                </Button>
                <Button DockPanel.Dock="Top" Foreground="White" Template="{StaticResource IconButtonTemplate}" Margin="0,2">
                <Button.Content>
                        <StackPanel Orientation="Horizontal" Margin="20,0">
                            <Image Source="/>
                            <TextBlock Margin="15,0" VerticalAlignment="Center" Text="时间安排"/>
                        </StackPanel>
                    </Button.Content>
                </Button>
                <Label/>
            </DockPanel>
        </Expander>

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