2020-03-29 07:22:38 来源: 阅读:-
阅读导航
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。
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):
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>
两个简单的菜单实体类:
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; } }}
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}
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))); } }}
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(); } }}
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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