C# WPF通过反射及Ioc容器加载并显示其它项目界面(精品)

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更好的阅读体验请查看原文:https://mp.weixin.qq.com/s/_Hw15CqJ7bX4OUsZHy_2jQ

概述

这节主要通过发射+Caliburn.Micro自带的ioc容器实现加载并显示其它项目中的界面.实现效果如下：

具体实现

-. ①首先在引导程序页面通过发射加载类库，并将视图注入ioc容器，这里为了实现解耦合注入了ICommonBasePage接口类型：

 private void ExternalLoad()        {            //container = new SimpleContainer();            //container.Instance(container);
            var asmPath = Assembly.GetAssembly(typeof(HelloBootstrapper)).Location;            var path = Directory.GetParent(asmPath).FullName;            string filePath = Path.Combine(path, "PluginTest.dll");
            //var assembly = Assembly.GetAssembly(typeof(PageBase));            //container.AllTypesOf<ShellViewModel>(assembly);            var assembly = Assembly.LoadFile(filePath);            assembly.GetTypes()                    .Where(type => type.IsClass)                    .Where(type => type.Name.EndsWith("ViewModel"))                    .ToList()                     .ForEach(viewModelType => container.RegisterPerRequest(                       typeof(ICommonBasePage), viewModelType.ToString(), viewModelType));
            //container            //    .Singleton<IWindowManager, WindowManager>()            //    .Singleton<IEventAggregator, EventAggregator>()            //    .PerRequest<MainWindowViewModel>();        }

接口定义在单独的类库中：

   public interface ICommonBasePage    {        void ShowNewWindow();    }

加入程序集到IEnumerable<Assembly>

protected override IEnumerable<Assembly> SelectAssemblies()        {            string filePath = Path.Combine(Directory.GetCurrentDirectory(), "PluginTest.dll");
            var assembly = Assembly.LoadFile(filePath);            return new[] { Assembly.GetExecutingAssembly(), assembly };        }

-.②PluginTest是要加载显示的项目：

PluginTestViewModel.cs源码如下：

using CommonShareBase;using System.ComponentModel.Composition;using System.Windows;
namespace PluginTest{    //[PluggablePart(name: "PluginTestViewModel", desciption: "This is PluginTestViewModel content pluggable part.", displayNameResourceKey: "PluginTestViewModel")]    //[Export("PluginTestViewModel", typeof(IPluggablePart))]    //[PartCreationPolicy(CreationPolicy.Shared)]    ///也可以这样    [Export(typeof(ICommonBasePage))]    public class PluginTestViewModel : ICommonBasePage    {        //public void PreparePart(IPluggablePartContext pluggablePartContext)        //{        //    //throw new NotImplementedException();        //}
        public void ShowNewWindow()        {            MessageBox.Show("dotnet讲堂");        }    }}

PluginTestView.xaml代码如下：

<UserControl x:Class="PluginTest.PluginTestView"             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:PluginTest"             mc:Ignorable="d"              d:DesignHeight="450" d:DesignWidth="800">    <Grid ShowGridLines="True">        <Grid.RowDefinitions>            <RowDefinition Height="*" />            <RowDefinition Height="*" />
        </Grid.RowDefinitions>        <Grid.ColumnDefinitions>            <ColumnDefinition Width="*"/>            <ColumnDefinition Width="*"/>        </Grid.ColumnDefinitions>        <Button Name="ShowNewWindow" Content="ShowNewWindow" Grid.Row="0" Grid.Column="0"  FontSize="35" Background="LightBlue"/>    </Grid></UserControl>

-. ③在调用的地方先定义ICommonBasePage 类型的VM：

 public ICommonBasePage PluginTestViewModel { get; set; }

按钮事件里面从ioc获取视图并给界面赋值：

  public void IocTest4()        {            //通过接口实现解耦合            var shellVM = IoC.Get<ICommonBasePage>();            //shellVM.ShowNewWindow();
            PluginTestViewModel = shellVM;            ActivateItemAsync(PluginTestViewModel);        }

源码下载

链接：https://pan.baidu.com/s/1wtNduWVUiFV46WwWE4hrEw

提取码：6666