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.NET CORE(C#) WPF简单菜单MVVM绑定

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

阅读导航

  1. 本文背景
  2. 代码实现
  3. 本文参考
  4. 源码

1. 本文背景

WPF中垂直导航菜单大家应该都常用,本文介绍使用MVVM的方式怎么绑定菜单,真的很简单。



2. 代码实现

使用 .Net Core 3.1 创建名为 “MenuMVVM” 的WPF模板项目,添加两个Nuget库:MaterialDesignThemes和MaterialDesignColors。

解决方案目录结构(这次失误,未截图,网站可以查看):

2.1 引入MD控件样式

文件【App.xaml】,在StartupUri中设置启动的视图【Views/MainView.xaml】,并在【Application.Resources】节点增加MD控件4个样式文件

<Application x:Class="MenuMVVM.App"             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"             StartupUri="Views/MainView.xaml">    <Application.Resources>        <ResourceDictionary>            <ResourceDictionary.MergedDictionaries>                <ResourceDictionary Source="pack://application:,,,/MaterialDesignThemes.Wpf;component/Themes/MaterialDesignTheme.Dark.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.LightBlue.xaml" />            </ResourceDictionary.MergedDictionaries>        </ResourceDictionary>    </Application.Resources></Application>

2.2 Models

两个简单的菜单实体类:

2.2.1 菜单新文件信息

文件【ItemCount.cs】,定义菜单项右侧的新文件显示个数及显示背景色:

using System.Windows.Media;namespace MenuMVVM.Models{    public class ItemCount    {        public Brush Color { get; private set; }        public int Value { get; private set; }        public ItemCount(Brush color, int value)        {            Color = color;            Value = value;        }    }}

2.2.2 菜单项信息

文件【MenuItem.cs】,定义菜单项展示的名称、图片、新文件信息:

using MaterialDesignThemes.Wpf;using System;namespace MenuMVVM.Models{    public class MenuItem    {        public String Name { get; private set; }        public PackIconKind Icon { get; private set; }        public ItemCount Count { get; private set; }        public MenuItem(String name, PackIconKind icon, ItemCount count)        {            Name = name;            Icon = icon;            Count = count;        }    }}

其中菜单项图标使用MD控件自带的字体图标库,通过枚举【PackIconKind】可以很方便的使用,该库提供的字体图标非常丰富,目前有4836个(枚举值有7883个), 下面是最后几个:

//// 摘要://     List of available icons for use with MaterialDesignThemes.Wpf.PackIcon.//// 言论://     All icons sourced from Material Design Icons Font - https://materialdesignicons.com///     - in accordance of https://github.com/Templarian/MaterialDesign/blob/master/license.txt.public enum PackIconKind{    .    .    .    ZodiacPisces = 4832,    HoroscopePisces = 4832,    ZodiacSagittarius = 4833,    HoroscopeSagittarius = 4833,    ZodiacScorpio = 4834,    HoroscopeScorpio = 4834,    ZodiacTaurus = 4835,    HoroscopeTaurus = 4835,    ZodiacVirgo = 4836,    HoroscopeVirgo = 4836}

2.3 ViewModels

文件【MainViewModel.cs】,只定义了简单的几个属性:窗体展示Logo、菜单绑定列表。属性定义比较简单,因为视图MainView.xaml展示内容不多:

using MaterialDesignThemes.Wpf;using MenuMVVM.Models;using System.Collections.Generic;using System.Windows.Media;namespace MenuMVVM.ViewModels{    public class MainViewModel    {        public string Logo { get; set; }        public List<MenuItem> LeftMenus { get; set; }        public MainViewModel()        {            Logo = "https://img.dotnet9.com/logo-foot.png";            LeftMenus = new List<MenuItem>();            LeftMenus.Add(new MenuItem("图片", PackIconKind.Image, new ItemCount(Brushes.Black, 2)));            LeftMenus.Add(new MenuItem("音乐", PackIconKind.Music, new ItemCount(Brushes.DarkBlue, 4)));            LeftMenus.Add(new MenuItem("视频", PackIconKind.Video, new ItemCount(Brushes.DarkGreen, 7)));            LeftMenus.Add(new MenuItem("文档", PackIconKind.Folder, new ItemCount(Brushes.DarkOrange, 9)));        }    }}

2.4 Views

文件【MainView.xaml】作为唯一的视图,只有31行布局代码,显示了一个Logo、菜单列表:

<Window x:Class="MenuMVVM.Views.MainView"        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"        xmlns:materialDesign="http://materialdesigninxaml.net/winfx/xaml/themes"        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"        mc:Ignorable="d"        Title="Dotnet9" Height="600" Width="1080" Background="#FF36235F" MouseLeftButtonDown="Window_MouseLeftButtonDown"        WindowStyle="None" ResizeMode="NoResize" WindowStartupLocation="CenterScreen">    <Grid>        <StackPanel Width="200" HorizontalAlignment="Left" Background="#FF472076">            <Grid Height="150" Background="White">                <Image Source="{Binding Logo}"/>            </Grid>            <ListView ItemsSource="{Binding LeftMenus}">                <ListView.ItemTemplate>                    <DataTemplate>                        <StackPanel Orientation="Horizontal" Height="30">                            <materialDesign:PackIcon Kind="{Binding Path=Icon}" Width="20" Height="20" VerticalAlignment="Center"/>                            <TextBlock Text="{Binding Path=Name}" Margin="20 0" FontSize="15" VerticalAlignment="Center"/>                            <Grid VerticalAlignment="Center">                                <Rectangle Width="30" Height="15" RadiusY="7.15" RadiusX="7.15" Fill="{Binding Path=Count.Color}" Stroke="White" StrokeThickness="0.7"/>                                <TextBlock Text="{Binding Path=Count.Value}" HorizontalAlignment="Center" VerticalAlignment="Center" FontSize="9"/>                            </Grid>                        </StackPanel>                    </DataTemplate>                </ListView.ItemTemplate>            </ListView>        </StackPanel>    </Grid></Window>

文件【MainView.xaml.cs】作为视图【MainView.xaml】的后台,绑定ViewModel,并实现鼠标左键拖动窗体功能:

using MenuMVVM.ViewModels;using System.Windows;namespace MenuMVVM.Views{    /// <summary>    /// 演示主窗体,只用于简单的绑定ListView控件    /// </summary>    public partial class MainView : Window    {        public MainView()        {            this.DataContext = new MainViewModel();            InitializeComponent();        }        private void Window_MouseLeftButtonDown(object sender, System.Windows.Input.MouseButtonEventArgs e)        {            DragMove();        }    }}

3.本文参考

  1. 视频一:C# WPF Design UI: Navigation Drawer Model View View Mode,配套源码:MenuMVVM。

4.源码

文中代码已经全部给出,图片使用站长网站外链,可直接Copy代码,按解决方案目录组织代码文件即可运行,另附原作者视频及源码,见【3.本文参考】。

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