一、先看效果

1 添加Nuget库

站长使用.Net Core 3.1创建的WPF工程，创建“DropDownMenu”解决方案后，需要添加两个Nuget库：MaterialDesignThemes和MaterialDesignColors，上图的效果是使用该控件库实现的，非常强大

2、项目结构

3、App.xaml引入

<Application x:Class="WPF侧边栏导航.App"

xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"

xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"

xmlns:local="clr-namespace:WPF侧边栏导航"

StartupUri="MainWindow.xaml">

<Application.Resources>

<ResourceDictionary>

<ResourceDictionary.MergedDictionaries>

<ResourceDictionary Source="pack://application:,,,/MaterialDesignThemes.Wpf;component/Themes/MaterialDesignTheme.Light.xaml"/>

<ResourceDictionary Source="pack://application:,,,/MaterialDesignThemes.Wpf;component/Themes/MaterialDesignTheme.Defaults.xaml"/>

<ResourceDictionary Source="pack://application:,,,/MaterialDesignColors;component/Themes/Recommended/Primary/MaterialDesignColor.Blue.xaml"/>

<ResourceDictionary Source="pack://application:,,,/MaterialDesignColors;component/Themes/Recommended/Accent/MaterialDesignColor.Indigo.xaml"/>

</ResourceDictionary.MergedDictionaries>

</ResourceDictionary>

</Application.Resources>

</Application>

4、 主窗体

1、前端

<Window x:Class="WPF侧边栏导航.MainWindow"

xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"

xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"

xmlns:d="http://schemas.microsoft.com/expression/blend/2008"

xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"

xmlns:materialDesign="http://materialdesigninxaml.net/winfx/xaml/themes"

xmlns:local="clr-namespace:WPF侧边栏导航"

mc:Ignorable="d"

Title="MainWindow" Height="450" Width="800" WindowStartupLocation="CenterScreen" WindowState="Maximized">

<Grid>

<Grid.RowDefinitions>

<RowDefinition Height="Auto"/>

<RowDefinition Height="*"/>

</Grid.RowDefinitions>

<Grid.ColumnDefinitions>

<ColumnDefinition Width="250"/>

<ColumnDefinition Width="*"/>

</Grid.ColumnDefinitions>

<!--<materialDesign:ColorZone Mode="PrimaryMid" Grid.ColumnSpan="2" HorizontalAlignment="Stretch">

<Grid>

<materialDesign:PopupBox PlacementMode="BottomAndAlignRightEdges" HorizontalAlignment="Right" Margin="10"/>

</Grid>

</materialDesign:ColorZone>-->

<Grid HorizontalAlignment="Stretch" Grid.Row="1" Background="White">

<!--<Grid.RowDefinitions>

<RowDefinition Height="70"/>

<RowDefinition Height="326*"/>

</Grid.RowDefinitions>-->

<ScrollViewer HorizontalAlignment="Stretch" HorizontalScrollBarVisibility="Disabled" VerticalScrollBarVisibility="Auto" Grid.Row="1">

<StackPanel x:Name="Menu" Margin="10"/>

</ScrollViewer>

</Grid>

<StackPanel x:Name="StackPanelMain" Grid.Row="1" Grid.Column="1" HorizontalAlignment="Stretch">

</StackPanel>

</Grid>

</Window>

2、后端

public partial class MainWindow : Window

{

public MainWindow()

{

InitializeComponent();

var menuRegister = new List<SubItem>();

menuRegister.Add(new SubItem("客户",new UserControlCustomers()));

menuRegister.Add(new SubItem("供应商", new UserControlProviders()));

menuRegister.Add(new SubItem("员工"));

menuRegister.Add(new SubItem("产品"));

var item6 = new ItemMenu("登记", menuRegister, PackIconKind.Register);

var menuSchedule = new List<SubItem>();

menuSchedule.Add(new SubItem("服务"));

menuSchedule.Add(new SubItem("会议"));

var item1 = new ItemMenu("预约", menuSchedule, PackIconKind.Schedule);

var menuReports = new List<SubItem>();

menuReports.Add(new SubItem("客户"));

menuReports.Add(new SubItem("供应商"));

menuReports.Add(new SubItem("产品"));

menuReports.Add(new SubItem("库存"));

menuReports.Add(new SubItem("销售额"));

var item2 = new ItemMenu("报告", menuReports, PackIconKind.FileReport);

var menuExpenses = new List<SubItem>();

menuExpenses.Add(new SubItem("固定资产"));

menuExpenses.Add(new SubItem("流动资金"));

var item3 = new ItemMenu("费用", menuExpenses, PackIconKind.ShoppingBasket);

var menuFinancial = new List<SubItem>();

menuFinancial.Add(new SubItem("现金流"));

var item4 = new ItemMenu("财务", menuFinancial, PackIconKind.ScaleBalance);

Menu.Children.Add(new UserControlMenuItem(item6, this));

Menu.Children.Add(new UserControlMenuItem(item1, this));

Menu.Children.Add(new UserControlMenuItem(item2, this));

Menu.Children.Add(new UserControlMenuItem(item3, this));

Menu.Children.Add(new UserControlMenuItem(item4, this));

}

internal void SwitchScreen(object sender)

{

var screen = ((UserControl)sender);

if (screen != null)

{

StackPanelMain.Children.Clear();

StackPanelMain.Children.Add(screen);

}

}

}

5、 UserControlMenuItem

1、前端

<UserControl x:Class="WPF侧边栏导航.UserControlMenuItem"

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:materialDesign="http://materialdesigninxaml.net/winfx/xaml/themes"

xmlns:local="clr-namespace:WPF侧边栏导航"

mc:Ignorable="d"

d:DesignHeight="450" d:DesignWidth="800" Background="White">

<Grid>

<materialDesign:PackIcon Kind="{Binding Icon}" Width="15" Height="15" Margin="10 16" Foreground="Black"/>

<ListBoxItem x:Name="ListViewItemMenu" Content="{Binding Header}" Padding="37 14" FontSize="15" Foreground="Black"/>

<Expander x:Name="ExpanderMenu" Header="{Binding Header}" IsExpanded="False" Width="210" HorizontalAlignment="Right" Background="{x:Null}" Foreground="Black">

<ListView x:Name="ListViewMenu" ItemsSource="{Binding SubItems}" Foreground="Black" ScrollViewer.HorizontalScrollBarVisibility="Disabled" SelectionChanged="ListViewMenu_SelectionChanged">

<ListView.ItemTemplate>

<DataTemplate>

<TextBlock Text="{Binding Name}" Padding="20 5"/>

</DataTemplate>

</ListView.ItemTemplate>

</ListView>

</Expander>

</Grid>

</UserControl>

2、后端

public partial class UserControlMenuItem : UserControl

{

MainWindow _context;

public UserControlMenuItem(ItemMenu itemMenu, MainWindow context)

{

InitializeComponent();

_context = context;

ExpanderMenu.Visibility = itemMenu.SubItems == null ? Visibility.Collapsed : Visibility.Visible;

ListViewItemMenu.Visibility = itemMenu.SubItems == null ? Visibility.Visible : Visibility.Collapsed;

this.DataContext = itemMenu;

}

private void ListViewMenu_SelectionChanged(object sender, SelectionChangedEventArgs e)

{

_context.SwitchScreen(((SubItem)((ListView)sender).SelectedItem).Screen);

}

}

6、 两个导航子菜单用户控件

1、

UserControl x:Class="WPF侧边栏导航.UserControlCustomers"

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:WPF侧边栏导航"

mc:Ignorable="d"

d:DesignHeight="450" d:DesignWidth="800">

<Grid>

<Grid.ColumnDefinitions>

<ColumnDefinition Width="*"/>

<ColumnDefinition Width="*"/>

<ColumnDefinition Width="*"/>

<ColumnDefinition Width="*"/>

</Grid.ColumnDefinitions>

<Grid.RowDefinitions>

<RowDefinition Height="150"/>

<RowDefinition Height="*"/>

</Grid.RowDefinitions>

<Border Margin="5" Grid.Column="0" Background="#FFC5C5C5" VerticalAlignment="Stretch" CornerRadius="12"/>

<Border Margin="5" Grid.Column="1" Background="#FF7C54A0" VerticalAlignment="Stretch" CornerRadius="12"/>

<Border Margin="5" Grid.Column="2" Background="#FF83CD80" VerticalAlignment="Stretch" CornerRadius="12"/>

<Border Margin="5" Grid.Column="3" Background="#FFEE9246" VerticalAlignment="Stretch" CornerRadius="12"/>

</Grid>

</UserControl>

2、

<UserControl x:Class="WPF侧边栏导航.UserControlProviders"

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:WPF侧边栏导航"

mc:Ignorable="d"

d:DesignHeight="450" d:DesignWidth="800">

<Grid>

<Grid.ColumnDefinitions>

<ColumnDefinition Width="*"/>

<ColumnDefinition Width="*"/>

<ColumnDefinition Width="*"/>

<ColumnDefinition Width="*"/>

</Grid.ColumnDefinitions>

<Grid.RowDefinitions>

<RowDefinition Height="150"/>

<RowDefinition Height="*"/>

</Grid.RowDefinitions>

<Border Margin="5" Grid.Column="0" Background="#FFD4E436" VerticalAlignment="Stretch" CornerRadius="12"/>

<Border Margin="5" Grid.Column="1" Background="#FF81F9FF" VerticalAlignment="Stretch" CornerRadius="12"/>

<Border Margin="5" Grid.Column="2" Background="#FF144BC3" VerticalAlignment="Stretch" CornerRadius="12"/>

<Border Margin="5" Grid.Column="3" Background="#FFD34EBA" VerticalAlignment="Stretch" CornerRadius="12"/>

</Grid>

</UserControl>

7、ViewModels

1、

public class ItemMenu
{
public ItemMenu(string header, List<SubItem> subItems, PackIconKind icon)
{
Header = header;
SubItems = subItems;
Icon = icon;
}

public string Header { get; private set; }
public PackIconKind Icon { get; private set; }
public List<SubItem> SubItems { get; private set; }
public UserControl Screen { get; private set; }
}

2、

public class SubItem
{
public SubItem(string name, UserControl screen = null)
{
Name = name;
Screen = screen;
}
public string Name { get; private set; }
public UserControl Screen { get; private set; }
}

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