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最近通过WPF开发项目，为了对WPF知识点进行总结，所以利用业余时间，开发一个学生信息管理系统【Student Information Management System】。本文主要简述如何通过WPF+Prism+MAH+WebApi进行开发基于三层架构的桌面版应用程序，仅供学习分享使用，如有不足之处，还请指正。 
涉及知识点
本次开发学生信息管理系统，涉及知识点如下： WPF:WPF（Windows Presentation Foundation）是（微软推出的）基于Windows的用户界面框架，提供了统一的编程模型，语言和框架，做到了分离界面设计人员与开发人员的工作；WPF提供了全新的多媒体交互用户图形界面。相比于WinForm传统开发，在WPF中，通过核心的MVVM设计思想，实现前后端的分离。 Prism:Prism是一个用于在 WPF、Xamarin Form、Uno 平台和 WinUI 中构建松散耦合、可维护和可测试的 XAML 应用程序框架。通过Prism，可以简化原生MVVM实现方式，并引入分模块设计思想。在Prism中，每一个功能，都可以设计成一个独立的模块，各个模块之间松耦合，可维护，可测试。框架中包括 MVVM、依赖注入、Command、Message Event、导航、弹窗等功能。在后续程序功能设计中，都会用到。 MAH:MahApps是一套基于WPF的界面组件，通过该组件，可以使用较小的开发成本实现一个相对很好的界面效果。作为后端开发，最头疼的就是如何设计美化页面，MAH可以让开发人员用最少的时间来开发Metro风格的页面。 WebApi:一般是指ASP.NET WebApi 用于快速开发基于REST风格的数据接口的框架。
Prism的模块化思想
在应用程序开发中，如果不采用模块化思想，那么各个页面混合在一起，看起杂乱无章，具体如下所示：
当我们引入模块化思想，那么各个模块的界限将变得清晰，如下所示： 
在本文示例的学生信息管理系统中，就是采用模块思想，使项目的各个模块即相对完整，又相互独立。如下所示： 
在开发中，引入模块化思想，通过Prism进行代码布局，如下所示： 
MVVM思想
MVVM是Model-View-ViewModel（模型-视图-视图模型）的缩写形式，它通常被用于WPF或Silverlight开发。MVVM的根本思想就是界面和业务功能进行分离，View的职责就是负责如何显示数据及发送命令，ViewModel的功能就是如何提供数据和执行命令。各司其职，互不影响。我们可以通过下图来直观的理解MVVM模式：
在本示例中，所有开发都将遵循MVVM思想的设计模式进行开发，如下所示： 
页面布局
在学生信息管理系统主界面，根据传统的布局方式，主要分为上（Header），中【左（Navigation），右（Main Content）】，下（Footer）四个部分，如下所示：
创建一个模块
一个模块是一个独立的WPF类库，在项目中，一个普通的类实现了IModule接口，就表示一个模块，以学生模块为例，如下所示：
using Prism.Ioc;using Prism.Modularity;using SIMS.StudentModule.ViewModels;using SIMS.StudentModule.Views;using System;
namespace SIMS.StudentModule{ public class StudentModule : IModule { public void OnInitialized(IContainerProvider containerProvider) {
}
public void RegisterTypes(IContainerRegistry containerRegistry) { containerRegistry.RegisterForNavigation<Student, StudentViewModel>(nameof(Student)); } }}
注意：在模块中，需要实现两个接口方法。在此模块中的RegisterTypes方法中，可以注册导航，窗口等以及初始化工作。 如果不注册为导航，而是需要注册到某一个Region中，则可以在OnInitialized方法中进行，以导航模块为例，如下所示： using Prism.Ioc;using Prism.Modularity;using Prism.Regions;using SIMS.NavigationModule.Views;using System;
namespace SIMS.NavigationModule{ public class NavigationModule : IModule { public void OnInitialized(IContainerProvider containerProvider) { var regionManager = containerProvider.Resolve<IRegionManager>(); regionManager.RegisterViewWithRegion("NavRegion",typeof(Navigation)); }
public void RegisterTypes(IContainerRegistry containerRegistry) { } }}
View和ViewModel自动适配
View和ViewMode在注册导航时，可以手动匹配，也可以自动匹配【需要以固定的方式命名才可以自动适配】。自动适配，需要是在UserControl中，增加一句prism:ViewModelLocator.AutoWireViewModel="True"即可，以标题头为例，如下所示：
<UserControl x:Class="SIMS.Views.Header" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:mc="http://schemas./markup-compatibility/2006" xmlns:d="http://schemas.microsoft.com/expression/blend/2008" xmlns:local="clr-namespace:SIMS.Views" mc:Ignorable="d" xmlns:prism="http:///" prism:ViewModelLocator.AutoWireViewModel="True" xmlns:mahApps="http://metro./winfx/xaml/controls" d:DesignHeight="100" d:DesignWidth="800"> <UserControl.Resources> <ResourceDictionary> <ResourceDictionary.MergedDictionaries> <ResourceDictionary Source="pack://application:,,,/MahApps.Metro;component/Styles/Themes/Light.Blue.xaml" /> </ResourceDictionary.MergedDictionaries> </ResourceDictionary> </UserControl.Resources>
<Grid Background="{DynamicResource MahApps.Brushes.Accent}"> <Grid.RowDefinitions> <RowDefinition Height="*"></RowDefinition> <RowDefinition Height="Auto"></RowDefinition> </Grid.RowDefinitions> <TextBlock Grid.Row="0" Text="学生信息管理系统" Foreground="White" FontSize="32" FontWeight="Bold" HorizontalAlignment="Left" VerticalAlignment="Center" Margin="20,5"></TextBlock> <StackPanel Grid.Row="1" HorizontalAlignment="Right" Orientation="Horizontal"> <TextBlock Text="Hello" Foreground="White" HorizontalAlignment="Center" VerticalAlignment="Center" Margin="3"></TextBlock> <TextBlock Text="Admin" Foreground="White" Margin="3" FontWeight="Bold"></TextBlock> <TextBlock Text="|" Foreground="White" Margin="3"></TextBlock> <TextBlock Text="Logout" Foreground="White" Margin="3" FontWeight="Bold"></TextBlock> </StackPanel> </Grid>
</UserControl>
弹出模态窗口
在Prism中，模块中的视图都是以UserControl的形式存在，那么如果需要弹出窗体页面，就需要在ViewModel中，实现IDialogAware接口，以Login登录窗口为例，如下所示：
using Prism.Regions;using Prism.Services.Dialogs;using SIMS.Views;using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.Threading.Tasks;using System.Windows;
namespace SIMS.ViewModels{ public class LoginViewModel : BindableBase, IDialogAware { private IRegionManager _regionManager; private IContainerExtension _container;
private string userName;
public string UserName { get { return userName; } set {SetProperty(ref userName , value); } }
private string password;
public string Password { get { return password; } set { SetProperty(ref password , value); } }
public LoginViewModel(IContainerExtension container,IRegionManager regionManager) { this._container = container; this._regionManager = regionManager; }
private void InitInfo() { var footer = _container.Resolve<Footer>(); IRegion footerRegion = _regionManager.Regions["LoginFooterRegion"]; footerRegion.Add(footer); }
#region 命令
private DelegateCommand loadedCommand;
public DelegateCommand LoadedCommand { get { if (loadedCommand == null) { loadedCommand = new DelegateCommand(Loaded); } return loadedCommand; } }
private void Loaded() { //InitInfo(); }
private DelegateCommand loginCommand;
public DelegateCommand LoginCommand { get { if (loginCommand == null) { loginCommand = new DelegateCommand(Login); } return loginCommand; } }
private void Login() { if (string.IsNullOrEmpty(UserName) || string.IsNullOrEmpty(Password)) { MessageBox.Show("用户名或密码为空，请确认"); return; } if (UserName == "admin" && Password == "abc123") { CloseWindow(); } else { MessageBox.Show("用户名密码不正确，请确认"); return; } }
private DelegateCommand cancelCommand;
public DelegateCommand CancelCommand { get { if (cancelCommand == null) { cancelCommand = new DelegateCommand(Cancel); } return cancelCommand; } }
private void Cancel() { RequestClose?.Invoke(new DialogResult(ButtonResult.Cancel)); }
#endregion
#region DialogAware接口
public string Title => "SIMS-Login";
public event Action<IDialogResult> RequestClose;
/// <summary> /// 成功时关闭窗口 /// </summary> public void CloseWindow() { RequestClose?.Invoke(new DialogResult(ButtonResult.OK)); }
public bool CanCloseDialog() { return true; }
public void OnDialogClosed() { //当关闭时 RequestClose?.Invoke(new DialogResult(ButtonResult.Cancel)); }
public void OnDialogOpened(IDialogParameters parameters) { //传递解析参数 }
#endregion }}
实现了IDialogAware接口，表示以窗口的形态出现，在需要弹出窗口的地方进行调用即可。如下所示： public MainWindowViewModel(IContainerExtension container, IRegionManager regionManager, IEventAggregator eventAggregator,IDialogService dialogService) { this._container = container; this._regionManager = regionManager; this.eventAggregator = eventAggregator; this._dialogService = dialogService; //弹出登录窗口 this._dialogService.ShowDialog("Login", null, LoginCallback, "MetroDialogWindow"); this.eventAggregator.GetEvent<NavEvent>().Subscribe(Navigation);}
注意：MetroDialogWindow是自定义个一个Metro风格的窗口，如果为空，则采用默认窗口风格。 模块间交互
按照模块化设计思想，虽然各个模块之间相互独立，但是难免为遇到模块之间进行交互的情况，所以Prism提供了事件聚合器，通过命令的发布和订阅来实现模块间的数据交互。以导航模块为例，当点击某一个导航时，发布一个命令，在主窗口订阅此事件，当收到事件时，将此导航对应的页面渲染到主页面区域中。步骤如下： 1. 定义一个事件using Prism.Events;using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.Threading.Tasks;
namespace SIMS.Utils.Events{ /// <summary> /// 导航事件 /// </summary> public class NavEvent : PubSubEvent<string> { }}
2. 发布事件用户点击导航菜单时，触发NavCommand，然后发布命令。 private DelegateCommand<object> navCommand;
public DelegateCommand<object> NavCommand{ get { if (navCommand == null) {
navCommand = new DelegateCommand<object>(Navigation); } return navCommand; }}
private void Navigation(object obj) { var menuItem = (HamburgerMenuItem)obj; if (menuItem != null) { var tag = menuItem.Tag; if (tag!=null) { this.eventAggregator.GetEvent<NavEvent>().Publish(tag.ToString()); } }}
3. 订阅命令在主窗口，订阅命令，当收到命令时，再初始化模块信息，如下所示： namespace SIMS.ViewModels{ public class MainWindowViewModel:BindableBase {
private IEventAggregator eventAggregator; private IContainerExtension _container; private IRegionManager _regionManager; private IDialogService _dialogService; public MainWindowViewModel(IContainerExtension container, IRegionManager regionManager, IEventAggregator eventAggregator,IDialogService dialogService) { this._container = container; this._regionManager = regionManager; this.eventAggregator = eventAggregator; this._dialogService = dialogService; //弹出登录窗口 this._dialogService.ShowDialog("Login", null, LoginCallback, "MetroDialogWindow"); this.eventAggregator.GetEvent<NavEvent>().Subscribe(Navigation); }
private void LoginCallback(IDialogResult dialogResult) { if (dialogResult.Result != ButtonResult.OK) { Application.Current.Shutdown(); } }
#region 事件和命令
private DelegateCommand loadedCommand;
public DelegateCommand LoadedCommand { get { if (loadedCommand == null) { loadedCommand = new DelegateCommand(Loaded); } return loadedCommand; } }
private void Loaded() { InitInfo(); }
private void InitInfo() { var header = _container.Resolve<Header>(); IRegion headerRegion = _regionManager.Regions["HeaderRegion"]; headerRegion.Add(header); // var footer = _container.Resolve<Footer>(); IRegion footerRegion = _regionManager.Regions["FooterRegion"]; footerRegion.Add(footer);
var welcome = _container.Resolve<Welcome>(); IRegion welcomeRegion = _regionManager.Regions["ContentRegion"]; welcomeRegion.Add(welcome); }
private void Navigation(string source) { _regionManager.RequestNavigate("ContentRegion", source); //MessageBox.Show(source); }
#endregion }}
注意：一般情况下，只有在不同模块时，才使用事件聚合器进行事件的订阅和发布。如果是同一模块，则没有必要。 核心代码
模块的配置
各个模块之间相互独立，所以在主模块中进行加载时，需要先进行配置。模块加载的方式有很多种，本例采用App.config配置方式，如下所示： <?xml version="1.0" encoding="utf-8" ?><configuration> <configSections> <section name="modules" type="Prism.Modularity.ModulesConfigurationSection, Prism.Wpf" /> </configSections> <startup> </startup> <modules> <module assemblyFile="SIMS.NavigationModule.dll" moduleType="SIMS.NavigationModule.NavigationModule, SIMS.NavigationModule, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null" moduleName="NavigationModule" startupLoaded="True" /> <module assemblyFile="SIMS.ScoreModule.dll" moduleType="SIMS.ScoreModule.ScoreModule, SIMS.ScoreModule, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null" moduleName="ScoreModule" startupLoaded="True" /> <module assemblyFile="SIMS.StudentModule.dll" moduleType="SIMS.StudentModule.StudentModule, SIMS.StudentModule, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null" moduleName="StudentModule" startupLoaded="True" /> <module assemblyFile="SIMS.ClassesModule.dll" moduleType="SIMS.ClassesModule.ClassesModule, SIMS.ClassesModule, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null" moduleName="ClassesModule" startupLoaded="True" /> <module assemblyFile="SIMS.CourseModule.dll" moduleType="SIMS.CourseModule.CourseModule, SIMS.CourseModule, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null" moduleName="CourseModule" startupLoaded="True" /> <module assemblyFile="SIMS.SysManagementModule.dll" moduleType="SIMS.SysManagementModule.SysManagementModule, SIMS.SysManagementModule, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null" moduleName="SysManagementModule" startupLoaded="True" /> </modules></configuration>
启动入口App.xaml，可以用来配置资源字典等初始化操作，如下所示： <prism:PrismApplication x:Class="SIMS.App" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:local="clr-namespace:SIMS" xmlns:mah="http://metro./winfx/xaml/controls" xmlns:prism="http:///" > <Application.Resources> <ResourceDictionary> <ResourceDictionary.MergedDictionaries> <ResourceDictionary Source="pack://application:,,,/MahApps.Metro;component/Styles/Controls.xaml" /> <ResourceDictionary Source="pack://application:,,,/MahApps.Metro;component/Styles/Fonts.xaml" /> <ResourceDictionary Source="pack://application:,,,/MahApps.Metro;component/Styles/Themes/Light.Blue.xaml" /> <ResourceDictionary Source="/Icons/Icons.xaml"></ResourceDictionary> </ResourceDictionary.MergedDictionaries> </ResourceDictionary> </Application.Resources></prism:PrismApplication>
启动入口App.xaml.cs，应用程序需要继承PrismApplication基类，才是一个Prism应用程序。在此文件中初始化App.config中配置的模块。如下所示： namespace SIMS{ /// <summary> /// Interaction logic for App.xaml /// </summary> public partial class App : PrismApplication { protected override Window CreateShell() { return Container.Resolve<MainWindow>(); }
protected override void RegisterTypes(IContainerRegistry containerRegistry) { containerRegistry.RegisterDialog<Login, LoginViewModel>(nameof(Login)); containerRegistry.Register<IDialogWindow, MetroDialogWindow>("MetroDialogWindow"); }
protected override IModuleCatalog CreateModuleCatalog() { return new ConfigurationModuleCatalog(); } }}
主窗口MainWindow.xaml页面布局，如下所示： <mahApps:MetroWindow x:Class="SIMS.Views.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./markup-compatibility/2006" xmlns:local="clr-namespace:SIMS" mc:Ignorable="d" xmlns:prism="http:///" xmlns:mahApps="http://metro./winfx/xaml/controls" xmlns:i="http://schemas.microsoft.com/xaml/behaviors" prism:ViewModelLocator.AutoWireViewModel="True" mahApps:Title="SIMS--Student Information Management System" mahApps:TitleCharacterCasing="Normal" d:DesignHeight="1080" d:DesignWidth="1920" WindowState="Maximized"> <Window.Resources> <ResourceDictionary> <ResourceDictionary.MergedDictionaries> <ResourceDictionary Source="pack://application:,,,/MahApps.Metro;component/Styles/Themes/Light.Blue.xaml" /> </ResourceDictionary.MergedDictionaries> </ResourceDictionary> </Window.Resources>
<i:Interaction.Triggers> <i:EventTrigger EventName="Loaded"> <i:InvokeCommandAction Command="{Binding LoadedCommand}"></i:InvokeCommandAction> </i:EventTrigger> </i:Interaction.Triggers> <Grid ShowGridLines="True"> <Grid.RowDefinitions> <RowDefinition Height="Auto"></RowDefinition> <RowDefinition Height="*"></RowDefinition> <RowDefinition Height="Auto"></RowDefinition> </Grid.RowDefinitions> <Grid.ColumnDefinitions> <ColumnDefinition Width="Auto"></ColumnDefinition> <ColumnDefinition Width="*"></ColumnDefinition> </Grid.ColumnDefinitions> <ContentControl prism:RegionManager.RegionName="HeaderRegion" Grid.Column="0" Grid.Row="0" Grid.ColumnSpan="2" MinHeight="80"></ContentControl> <ContentControl prism:RegionManager.RegionName="NavRegion" Grid.Row="1" Grid.Column="0"></ContentControl> <ContentControl prism:RegionManager.RegionName="ContentRegion" Grid.Row="1" Grid.Column="1"></ContentControl> <ContentControl prism:RegionManager.RegionName="FooterRegion" Grid.Row="2" Grid.Column="0" Grid.ColumnSpan="2" MinHeight="50"></ContentControl> </Grid></mahApps:MetroWindow>
主窗口MainWindowViewModel，代码如下： namespace SIMS.ViewModels{ public class MainWindowViewModel:BindableBase {
private IEventAggregator eventAggregator; private IContainerExtension _container; private IRegionManager _regionManager; private IDialogService _dialogService; public MainWindowViewModel(IContainerExtension container, IRegionManager regionManager, IEventAggregator eventAggregator,IDialogService dialogService) { this._container = container; this._regionManager = regionManager; this.eventAggregator = eventAggregator; this._dialogService = dialogService; //弹出登录窗口 this._dialogService.ShowDialog("Login", null, LoginCallback, "MetroDialogWindow"); this.eventAggregator.GetEvent<NavEvent>().Subscribe(Navigation); }
private void LoginCallback(IDialogResult dialogResult) { if (dialogResult.Result != ButtonResult.OK) { Application.Current.Shutdown(); } }
#region 事件和命令
private DelegateCommand loadedCommand;
public DelegateCommand LoadedCommand { get { if (loadedCommand == null) { loadedCommand = new DelegateCommand(Loaded); } return loadedCommand; } }
private void Loaded() { InitInfo(); }
private void InitInfo() { var header = _container.Resolve<Header>(); IRegion headerRegion = _regionManager.Regions["HeaderRegion"]; headerRegion.Add(header); // var footer = _container.Resolve<Footer>(); IRegion footerRegion = _regionManager.Regions["FooterRegion"]; footerRegion.Add(footer);
var welcome = _container.Resolve<Welcome>(); IRegion welcomeRegion = _regionManager.Regions["ContentRegion"]; welcomeRegion.Add(welcome); }
private void Navigation(string source) { _regionManager.RequestNavigate("ContentRegion", source); //MessageBox.Show(source); }
#endregion }}
导航页面Navigation.xaml页面采用MAH的Hamburger菜单，如下所示：
<UserControl x:Class="SIMS.NavigationModule.Views.Navigation" 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:iconPacks="http://metro./winfx/xaml/iconpacks" xmlns:local="clr-namespace:SIMS.NavigationModule.Views" xmlns:mah="http://metro./winfx/xaml/controls" xmlns:mc="http://schemas./markup-compatibility/2006" xmlns:i="http://schemas.microsoft.com/xaml/behaviors" xmlns:prism="http:///" prism:ViewModelLocator.AutoWireViewModel="True" d:DesignHeight="300" d:DesignWidth="240" mc:Ignorable="d">
<UserControl.Resources> <ResourceDictionary> <ResourceDictionary.MergedDictionaries> <ResourceDictionary Source="pack://application:,,,/MahApps.Metro;component/Styles/Controls.xaml" /> <ResourceDictionary Source="pack://application:,,,/MahApps.Metro;component/Styles/Fonts.xaml" /> <ResourceDictionary Source="pack://application:,,,/MahApps.Metro;component/Styles/Themes/Light.Blue.xaml" /> </ResourceDictionary.MergedDictionaries> <!-- This is the template for all menu items. In this sample we use the glyph items. --> <DataTemplate x:Key="HamburgerMenuItem" DataType="{x:Type mah:HamburgerMenuGlyphItem}"> <DockPanel Height="48" LastChildFill="True"> <Grid x:Name="IconPart" DockPanel.Dock="Left">
<Image Margin="12" HorizontalAlignment="Center" VerticalAlignment="Center" Source="{Binding Glyph}" /> </Grid> <TextBlock x:Name="TextPart" VerticalAlignment="Center" FontSize="16" Text="{Binding Label}" /> </DockPanel> </DataTemplate>
<DataTemplate x:Key="HamburgerOptionsMenuItem" DataType="{x:Type mah:HamburgerMenuIconItem}"> <DockPanel Height="48" LastChildFill="True"> <ContentControl x:Name="IconPart" Content="{Binding Icon}" DockPanel.Dock="Left" Focusable="False" IsTabStop="False" /> <TextBlock x:Name="TextPart" VerticalAlignment="Center" FontSize="16" Text="{Binding Label}" /> </DockPanel> </DataTemplate> </ResourceDictionary> </UserControl.Resources>
<Grid Background="{DynamicResource MahApps.Brushes.Accent}"> <Grid.ColumnDefinitions> <ColumnDefinition Width="Auto" /> </Grid.ColumnDefinitions> <mah:HamburgerMenu x:Name="HamburgerMenuControl" Grid.Column="0" DisplayMode="CompactOverlay" Margin="0" IsPaneOpen="True"
HamburgerButtonHelpText="Please click me" HamburgerButtonClick="HamburgerMenuControl_HamburgerButtonClick" ItemTemplate="{StaticResource HamburgerMenuItem}" OptionsItemTemplate="{StaticResource HamburgerOptionsMenuItem}" ItemsSource="{Binding NavItems}" VerticalScrollBarOnLeftSide="False"> <i:Interaction.Triggers> <i:EventTrigger EventName="ItemInvoked"> <i:InvokeCommandAction Command="{Binding NavCommand}" CommandParameter="{Binding ElementName=HamburgerMenuControl, Path=SelectedItem}" ></i:InvokeCommandAction> </i:EventTrigger> </i:Interaction.Triggers> <!-- Header --> <mah:HamburgerMenu.HamburgerMenuHeaderTemplate> <DataTemplate> <TextBlock HorizontalAlignment="Center" VerticalAlignment="Center" FontSize="16" Foreground="White" Text="" /> </DataTemplate> </mah:HamburgerMenu.HamburgerMenuHeaderTemplate> <mah:HamburgerMenu.OptionsItemsSource> <mah:HamburgerMenuItemCollection>
<mah:HamburgerMenuIconItem x:Name="AboutOption"
Label="About"> <mah:HamburgerMenuIconItem.Icon> <iconPacks:PackIconMaterial Width="22" Height="22" HorizontalAlignment="Center" VerticalAlignment="Center" Kind="Help" /> </mah:HamburgerMenuIconItem.Icon> <mah:HamburgerMenuIconItem.Tag> <TextBlock HorizontalAlignment="Center" VerticalAlignment="Center" FontSize="28" FontWeight="Bold"> About </TextBlock> </mah:HamburgerMenuIconItem.Tag> </mah:HamburgerMenuIconItem>
</mah:HamburgerMenuItemCollection> </mah:HamburgerMenu.OptionsItemsSource> <!-- Content --> <mah:HamburgerMenu.ContentTemplate> <DataTemplate> <Grid x:Name="ContentGrid"> <Grid.RowDefinitions> <RowDefinition Height="48" /> <RowDefinition /> </Grid.RowDefinitions> <Border Grid.Row="0" Margin="-1 0 -1 0" Background="#7A7A7A"> <TextBlock x:Name="Header" HorizontalAlignment="Center" VerticalAlignment="Center" FontSize="24" Foreground="White" Text="{Binding Label}" /> </Border> <mah:TransitioningContentControl Grid.Row="1" Content="{Binding}" RestartTransitionOnContentChange="True" Transition="Default"> <mah:TransitioningContentControl.Resources> <DataTemplate DataType="{x:Type mah:HamburgerMenuGlyphItem}"> <Image Source="{Binding Glyph, Mode=OneWay, Converter={mah:NullToUnsetValueConverter}}" /> </DataTemplate> <DataTemplate DataType="{x:Type mah:HamburgerMenuIconItem}"> <ContentControl Content="{Binding Tag, Mode=OneWay}" Focusable="True" IsTabStop="False" /> </DataTemplate> </mah:TransitioningContentControl.Resources> </mah:TransitioningContentControl> </Grid> </DataTemplate> </mah:HamburgerMenu.ContentTemplate> </mah:HamburgerMenu>
</Grid>
</UserControl>
导航页面NavigationViewModel页面代码，如下所示：
namespace SIMS.NavigationModule.ViewModels{ public class NavigationViewModel : BindableBase { #region 属性和构造函数
private IEventAggregator eventAggregator;
private List<HamburgerMenuItemBase> navItems;
public List<HamburgerMenuItemBase> NavItems { get { return navItems; } set { SetProperty(ref navItems, value); } }
public NavigationViewModel(IEventAggregator eventAggregator) { this.eventAggregator = eventAggregator; navItems = new List<HamburgerMenuItemBase>(); navItems.Add(new HamburgerMenuHeaderItem() { Label = "学生管理"}); navItems.Add(new HamburgerMenuGlyphItem() { Label="学生管理",Tag="Student" ,Glyph="/images/icon_student.png" }); navItems.Add(new HamburgerMenuGlyphItem() { Label = "班级管理",Tag="Classes" , Glyph = "/images/icon_classes.png" }); navItems.Add(new HamburgerMenuGlyphItem() { Label = "课程管理", Tag="Course" , Glyph = "/images/icon_course.png" }); navItems.Add(new HamburgerMenuGlyphItem() { Label = "成绩管理" ,Tag="Score", Glyph = "/images/icon_score.png" }); navItems.Add(new HamburgerMenuHeaderItem() { Label = "系统管理", }); navItems.Add(new HamburgerMenuGlyphItem() { Label = "个人信息",Tag="Personal", Glyph = "/images/icon_personal.png" }); navItems.Add(new HamburgerMenuGlyphItem() { Label = "用户管理",Tag="User", Glyph = "/images/icon_user.png" }); navItems.Add(new HamburgerMenuGlyphItem() { Label = "角色管理",Tag="Role", Glyph = "/images/icon_role.png" }); }
#endregion
#region 命令
private DelegateCommand<object> navCommand;
public DelegateCommand<object> NavCommand { get { if (navCommand == null) {
navCommand = new DelegateCommand<object>(Navigation); } return navCommand; } }
private void Navigation(object obj) { var menuItem = (HamburgerMenuItem)obj; if (menuItem != null) { var tag = menuItem.Tag; if (tag!=null) { this.eventAggregator.GetEvent<NavEvent>().Publish(tag.ToString()); } } }
#endregion }}
示例截图
本示例目前主要实现了登录，及主页面布局，导航等功能，如下所示：
备注
以上是本文介绍的关于学生信息管理系统的主要内容，旨在抛砖引玉一起学习，共同进步。
学习编程，从关注【老码识途】开始！！！ 
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