C#一个基于.NETCore3.1的开源项目帮你彻底搞懂WPF框架Prism

概述

此项目平台框架:.NET Core 3.1

Prism版本:8.0.0.1909

提示:这些项目都在同一解决方法下,需要依次打开运行,可以选中项目-》右键-》设置启动项目,然后运行:

目录介绍

Topic

描述

Bootstrapper and the Shell

创建一个基本的引导程序和shell

Regions

创建一个区域

Custom Region Adapter

为StackPanel创建自定义区域适配器

View Discovery

使用视图发现自动注入视图

View Injection

使用视图注入手动添加和删除视图

View Activation/Deactivation

手动激活和停用视图

Modules with App.config

使用应用加载模块。配置文件

Modules with Code

使用代码加载模块

Modules with Directory

从目录加载模块

Modules loaded manually

使用IModuleManager手动加载模块

ViewModelLocator

使用ViewModelLocator

ViewModelLocator - Change Convention

更改ViewModelLocator命名约定

ViewModelLocator - Custom Registrations

为特定视图手动注册ViewModels

DelegateCommand

使用DelegateCommand和DelegateCommand

CompositeCommands

了解如何使用CompositeCommands作为单个命令调用多个命令

IActiveAware Commands

使您的命令IActiveAware仅调用激活的命令

Event Aggregator

使用IEventAggregator

Event Aggregator - Filter Events

订阅事件时筛选事件

RegionContext

使用RegionContext将数据传递到嵌套区域

Region Navigation

请参见如何实现基本区域导航

Navigation Callback

导航完成后获取通知

Navigation Participation

通过INavigationAware了解视图和视图模型导航参与

Navigate to existing Views

导航期间控制视图实例

Passing Parameters

将参数从视图/视图模型传递到另一个视图/视图模型

Confirm/cancel Navigation

使用IConfirmNavigationReqest界面确认或取消导航

Controlling View lifetime

使用IRegionMemberLifetime自动从内存中删除视图

Navigation Journal

了解如何使用导航日志

部分项目演示和介绍

① BootstrapperShell启动界面:

这个主要演示Prism框架搭建的用法:

step1:在nuget上引用Prsim.Unity。

step2:修改App.xaml:设置引导程序。

             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:local="clr-namespace:BootstrapperShell">




public partial class App : Application
{
protected override void OnStartup(StartupEventArgs e)
{
base.OnStartup(e);

var bootstrapper = new Bootstrapper();
bootstrapper.Run();
}
}

step3:在引导程序中设置启动项目。

using Unity;
using Prism.Unity;
using BootstrapperShell.Views;
using System.Windows;
using Prism.Ioc;

namespace BootstrapperShell
{
class Bootstrapper : PrismBootstrapper
{
protected override DependencyObject CreateShell()
{
return Container.Resolve();
}

protected override void RegisterTypes(IContainerRegistry containerRegistry)
{

}
}
}

step4:在MainWindow.xaml中显示个字符串。

        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="Shell" Height="350" Width="525">




②ViewInjection:视图注册

MainWindow.xaml:通过ContentControl 关联视图:

        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:prism="http://prismlibrary.com/"
Title="Shell" Height="350" Width="525">






MainWindow.xaml.cs:鼠标点击后通过IRegion 接口注册视图:

public partial class MainWindow : Window
{
IContainerExtension _container;
IRegionManager _regionManager;

public MainWindow(IContainerExtension container, IRegionManager regionManager)
{
InitializeComponent();
_container = container;
_regionManager = regionManager;
}

private void Button_Click(object sender, RoutedEventArgs e)
{
var view = _container.Resolve();
IRegion region = _regionManager.Regions["ContentRegion"];
region.Add(view);
}
}

③ActivationDeactivation:视图激活和注销

MainWindow.xaml.cs:这里在窗体构造函数中注入了一个容器扩展接口和一个regin管理器接口,分别用来装载视图和注册regin,窗体的激活和去激活分别通过regions的Activate和Deactivate方法实现。

public partial class MainWindow : Window
{
IContainerExtension _container;
IRegionManager _regionManager;
IRegion _region;

ViewA _viewA;
ViewB _viewB;

public MainWindow(IContainerExtension container, IRegionManager regionManager)
{
InitializeComponent();
_container = container;
_regionManager = regionManager;

this.Loaded += MainWindow_Loaded;
}

private void MainWindow_Loaded(object sender, RoutedEventArgs e)
{
_viewA = _container.Resolve();
_viewB = _container.Resolve();

_region = _regionManager.Regions["ContentRegion"];

_region.Add(_viewA);
_region.Add(_viewB);
}

private void Button_Click(object sender, RoutedEventArgs e)
{
//activate view a
_region.Activate(_viewA);
}

private void Button_Click_1(object sender, RoutedEventArgs e)
{
//deactivate view a
_region.Deactivate(_viewA);
}

private void Button_Click_2(object sender, RoutedEventArgs e)
{
//activate view b
_region.Activate(_viewB);
}

private void Button_Click_3(object sender, RoutedEventArgs e)
{
//deactivate view b
_region.Deactivate(_viewB);
}
}

④UsingEventAggregator:事件发布订阅

事件类定义:

public class MessageSentEvent : PubSubEvent
{
}

注册两个组件:ModuleA和ModuleB。

protected override void ConfigureModuleCatalog(IModuleCatalog moduleCatalog)
{
moduleCatalog.AddModule();
moduleCatalog.AddModule();
}

ModuleAModule 中注册视图MessageView:

public class ModuleAModule : IModule
{
public void OnInitialized(IContainerProvider containerProvider)
{
var regionManager = containerProvider.Resolve();
regionManager.RegisterViewWithRegion("LeftRegion", typeof(MessageView));
}

public void RegisterTypes(IContainerRegistry containerRegistry)
{

}
}

MessageView.xaml:视图中给button俺妞妞绑定命令:

             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:prism="http://prismlibrary.com/"
prism:ViewModelLocator.AutoWireViewModel="True" Padding="25">


MessageViewModel.cs:在vm中把界面绑定的命令委托给SendMessage,然后在方法SendMessage中发布消息:

using Prism.Commands;
using Prism.Events;
using Prism.Mvvm;
using UsingEventAggregator.Core;

namespace ModuleA.ViewModels
{
public class MessageViewModel : BindableBase
{
IEventAggregator _ea;

private string _message = "Message to Send";
public string Message
{
get { return _message; }
set { SetProperty(ref _message, value); }
}

public DelegateCommand SendMessageCommand { get; private set; }

public MessageViewModel(IEventAggregator ea)
{
_ea = ea;
SendMessageCommand = new DelegateCommand(SendMessage);
}

private void SendMessage()
{
_ea.GetEvent().Publish(Message);
}
}
}

在MessageListViewModel 中接收并显示接收到的消息:

public class MessageListViewModel : BindableBase
{
IEventAggregator _ea;

private ObservableCollection _messages;
public ObservableCollection Messages
{
get { return _messages; }
set { SetProperty(ref _messages, value); }
}

public MessageListViewModel(IEventAggregator ea)
{
_ea = ea;
Messages = new ObservableCollection();

_ea.GetEvent().Subscribe(MessageReceived);
}

private void MessageReceived(string message)
{
Messages.Add(message);
}
}

以上就是这个开源项目比较经典的几个入门实例,其它就不展开讲解了。

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