我們要做的效果是這樣的，左側是可折疊的菜單欄，右側是內容區域，點擊左側的菜單項右側內容區域則相應地切換。

wpf實現的話，我的辦法是用一個tabcontrol，修改tabcontrol的樣式模板，首先將控件的TabStripPlacement設置為left使tabcontrol的item header部分靠左內容靠右，然後用一個Expander將TabPanel包住實現可折疊菜單效果，最後就是把用到的控件樣式修改一下即可。

先看下效果圖：

WPF做出來的效果圖：

未完善的問題：

不能添加多個可折疊菜單，我暫時沒想到比較好的辦法。

新建一個項目，名字隨你，新建一個自定義用戶控件前臺修改為：

<TabControl x:Class="cloundmusic_left.controls.itabcontrol"
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006
 
" 
             xmlns:d="http://schemas.microsoft.com/expression/blend/2008" 
             xmlns:local="clr-namespace:cloundmusic_left.controls"
             mc:Ignorable="d" 
             d:DesignHeight="300" d:DesignWidth="300">
    <TabControl.Resources>
        <!--折疊菜單的箭頭按鈕-->
        <ControlTemplate x:Key="
 
ExpanderToggleButton"
                 TargetType="{x:Type ToggleButton}">
            <Border Background="{TemplateBinding Background}" Width="{TemplateBinding Width}" x:Name="Border"
        >

                <VisualStateManager.VisualStateGroups>

                    <VisualStateGroup x:Name="CheckStates">
                        <VisualState x:Name="Checked">
                            <Storyboard>
                                <ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.Visibility)"
                                           Storyboard.TargetName="CollapsedArrow">
                                    <DiscreteObjectKeyFrame KeyTime="0"
                                      Value="{x:Static Visibility.Hidden}" />
                                </ObjectAnimationUsingKeyFrames>
                                <ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.Visibility)"
                                           Storyboard.TargetName="ExpandededArrow">
                                    <DiscreteObjectKeyFrame KeyTime="0"
                                      Value="{x:Static Visibility.Visible}" />
                                </ObjectAnimationUsingKeyFrames>
                            </Storyboard>
                        </VisualState>
                        <VisualState x:Name="Unchecked" />
                        <VisualState x:Name="Indeterminate" />
                    </VisualStateGroup>
                </VisualStateManager.VisualStateGroups>
                <Grid Margin="0,0,13,0" HorizontalAlignment="Right" VerticalAlignment="Center">
                    <Path x:Name="CollapsedArrow"
            HorizontalAlignment="Center"
            VerticalAlignment="Center"
            Data="M 0 0 L 4 4 L 8 0 Z">
                        <Path.Fill>
                            <SolidColorBrush Color="#7d7d7d" />
                        </Path.Fill>
                    </Path>
                    <Path x:Name="ExpandededArrow"
            HorizontalAlignment="Center"
            VerticalAlignment="Center"
            Visibility="Collapsed"
            Data="M 0 4 L 4 0 L 8 4 Z">
                        <Path.Fill>
                            <SolidColorBrush Color="#7d7d7d" />
                        </Path.Fill>
                    </Path>
                </Grid>
            </Border>
        </ControlTemplate>
        
        <Style TargetType="{x:Type Expander}">
            <Setter Property="Cursor" Value="Hand"/>
            <Setter Property="Foreground" Value="#7d7d7d"/>
            <Setter Property="Template">
                <Setter.Value>
                    <ControlTemplate TargetType="{x:Type Expander}">
                        <Border BorderBrush="#e1e1e2" BorderThickness="0,0,1,0">
                            <Grid Background="#f5f5f7">
                                <Grid.RowDefinitions>
                                    <RowDefinition Height="Auto" />
                                    <RowDefinition x:Name="ContentRow"
                           Height="0" />
                                </Grid.RowDefinitions>

                                <Border MinHeight="32" x:Name="Border"
                  Grid.Row="0"
                  >

                                    <Grid VerticalAlignment="Center">


                                        <ContentPresenter 
                                Margin="4"
                                           
                                ContentSource="Header"
                                RecognizesAccessKey="True" />

                                        <ToggleButton Background="Transparent" Width="{Binding ElementName=Border,Path=ActualWidth}" Panel.ZIndex="1" OverridesDefaultStyle="True"
                            Template="{StaticResource ExpanderToggleButton}"
                            IsChecked="{Binding IsExpanded, Mode=TwoWay, 
                  RelativeSource={RelativeSource TemplatedParent}}">

                                        </ToggleButton>
                                    </Grid>
                                </Border>
                                <Border x:Name="Content"
                  Grid.Row="1"
                 >

                                    <ContentPresenter/>
                                </Border>
                            </Grid>
                        </Border>
                        <ControlTemplate.Triggers>
                            <Trigger Property="IsExpanded"
                   Value="True">
                                <Setter TargetName="ContentRow"
                    Property="Height"
                    Value="{Binding DesiredHeight, ElementName=Content}" />
                            </Trigger>
                        </ControlTemplate.Triggers>
                    </ControlTemplate>
                </Setter.Value>
            </Setter>
        </Style>

        <Style TargetType="{x:Type TabItem}">
            <Setter Property="OverridesDefaultStyle" Value="True"/>
            <Setter Property="Template">
                <Setter.Value>
                    <ControlTemplate TargetType="{x:Type TabItem}">
                        <Grid SnapsToDevicePixels="true">
                            <Border Cursor="Hand" MinWidth="199" MinHeight="32" x:Name="Bd" CornerRadius="0" Background="Transparent" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="3,0,0,0" Padding="0" Margin="0">
                                <Grid VerticalAlignment="Center" HorizontalAlignment="Left">
                                    <StackPanel Orientation="Horizontal">

                                        <ContentPresenter x:Name="Content" Margin="17,0,0,0" ContentSource="Header" HorizontalAlignment="Left" RecognizesAccessKey="True" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" VerticalAlignment="Center"/>


                                    </StackPanel>

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

                        <ControlTemplate.Triggers>
                            <Trigger Property="IsMouseOver" Value="false">

                                <Setter Property="Foreground" Value="#5c5c5c"/>
                            </Trigger>
                            <Trigger Property="IsMouseOver" Value="true">

                                <Setter Property="Foreground" Value="#000000"/>
                            </Trigger>

                            <Trigger Property="IsSelected" Value="true">
                                <Setter Property="Panel.ZIndex" Value="1"/>
                                <Setter Property="Background" TargetName="Bd" Value="#e6e7ea"/>

                                <Setter Property="Foreground" Value="#000000"/>
                                <Setter Property="BorderThickness" TargetName="Bd" Value="3,0,0,0"/>
                                <Setter Property="BorderBrush" TargetName="Bd" Value="#c62f2f"/>

                            </Trigger>

                        </ControlTemplate.Triggers>
                    </ControlTemplate>

                </Setter.Value>
            </Setter>
        </Style>
    </TabControl.Resources>
    <TabControl.Style>
        <Style  TargetType="{x:Type TabControl}">
            <Setter Property="OverridesDefaultStyle"
          Value="True" />
            <Setter Property="TabStripPlacement"
          Value="Left" />
            <Setter Property="SnapsToDevicePixels"
          Value="True" />
            <Setter Property="Template">
                <Setter.Value>
                    <ControlTemplate TargetType="{x:Type local:itabcontrol}">
                        <Grid>
                            <Grid.ColumnDefinitions>
                                <ColumnDefinition Width="200" />
                                <ColumnDefinition Width="*" />
                            </Grid.ColumnDefinitions>

                            <!--可折疊菜單-->
                            <Expander Header="{TemplateBinding iTitle}" Grid.Column="0">
                                <!--菜單項-->
                                <TabPanel x:Name="HeaderPanel"
                    
                   
                    IsItemsHost="True"
                    KeyboardNavigation.TabIndex="1"
                    Background="Transparent" />
                            </Expander>
                            <!--右側內容區域-->
                            <Border x:Name="Border"
                  Grid.Column="1"
                  
                  KeyboardNavigation.TabNavigation="Local"
                  KeyboardNavigation.DirectionalNavigation="Contained"
                  KeyboardNavigation.TabIndex="2">

                                <ContentPresenter x:Name="PART_SelectedContentHost"
                              Margin="4"
                              ContentSource="SelectedContent" />
                            </Border>
                        </Grid>
                    </ControlTemplate>
                </Setter.Value>
            </Setter>
        </Style>


    </TabControl.Style>
</TabControl>

修改後你的vs也許會抱一個錯：

這個報錯就像vs錯誤列表裏的警告一樣，沒啥卵用，不用理它，程序是可以運行的。

ok繼續，後臺代碼加一個依賴屬性：

 public string iTitle
        {
            get { return (string)GetValue(iTitleProperty); }
            set { SetValue(iTitleProperty, value); }
        }

        public static readonly DependencyProperty iTitleProperty =
            DependencyProperty.Register("iTitle", typeof(string), typeof(itabcontrol));

然後只要在界面中使用這個控件即可。

呃我發現這個項目並沒有什麽難點，實現方法開頭也說了，所以這裏不一步步講了。

值得一提的是，加入的Expander也就是可折疊菜單的header代表菜單名，這裏我是把修改的這個TabControl寫在一個自定義控件裏的，在界面調用的時候默認是無法給它設置內容的，所以我們要在這個自定義控件中加入一個依賴屬性，然後在樣式中綁定這個屬性。這裏就涉及到一個比較有意思的東西，在樣式中綁定一個屬性也許你沒接觸過，但是你一定知道Binding的用法，而在樣式中是沒辦法這麽用的，那該怎麽去做呢？相信你看完代碼就知道了。

項目下載：

點我下載

C# WPF 左側菜單右側內容布局效果實現