2.Prism框架ModuleAttribute、IOC扩展、功能注册 - ToB企服应用市场:ToB评测及商务社交产业平台

[Module(ModuleName = "MyModule", OnDemand = true)]
public class MyModule : IModule
{
// 模块的初始化和加载逻辑
}

复制代码

/// <summary>
/// 标注类型的生命周期是否自动初始化
/// AttributeTargets.Class自定义特性的对象
/// AllowMultiple :是否允许被多次使用
/// </summary>
[AttributeUsage(AttributeTargets.Class, AllowMultiple = false)]
public class ExposedServiceAttribute : Attribute
{
public Lifetime LiftTime { get; set; }
public bool AutoInitialize { get; set; }
public Type[] Types { get; set; }
public ExposedServiceAttribute(Lifetime liftTime = Lifetime.Transient, params Type[] types)
{
LiftTime = liftTime;
Types = types;
}
}

复制代码

public enum Lifetime
{
/// <summary>
/// 单列
/// </summary>
Singleton,
/// <summary>
/// 多列
/// </summary>
Transient
}

复制代码

[AttributeUsage(
validon,
AllowMultiple=allowmultiple,
Inherited=inherited
)]

复制代码

validon：自定义特性的对象，可以是类、方法、属性等对象（默认值是 AttributeTargets.All）

复制代码

AllowMultiple：是否允许被多次使用（默认值为false：单用的）

复制代码

Inherited：是否可被派生类继承（默认值为false：不能） 依赖注入扩展类： 加载模块时，实例化标注为ExposedServiceAttriubute特性的类

复制代码

/// <summary>
/// 加载模块时，实例化标注为ExposedServiceAttriubute特性的类
/// </summary>
public static class DependencyExtension
{
private static List<Type> GetTypes(Assembly assembly)
{
var result = assembly.GetTypes().Where(t => t != null && t.IsClass && !t.IsAbstract &&
t.CustomAttributes.Any(p => p.AttributeType == typeof(ExposedServiceAttribute))).ToList();
return result;
}
/// <summary>
/// 扩展IContainerRegistry接口的注册类型的功能
/// </summary>
/// <param name="container"></param>
/// <param name="assembly"></param>
public static void RegisterAssembly(this IContainerRegistry container, Assembly assembly)
{
var list = GetTypes(assembly);
foreach (var type in list)
{
RegisterAssembly(container, type);
}
}
private static IEnumerable<ExposedServiceAttribute> GetExposedServices(Type type)
{
var typeInfo = type.GetTypeInfo();
return typeInfo.GetCustomAttributes<ExposedServiceAttribute>();
}
public static void RegisterAssembly(IContainerRegistry container, Type type)
{
var list = GetExposedServices(type).ToList();
foreach (var item in list)
{
if (item.LiftTime == Lifetime.Singleton)
{
container.RegisterSingleton(type);//注册单例
}
foreach (var IType in item.Types)
{
if (item.LiftTime == Lifetime.Singleton)
{
container.RegisterSingleton(IType, type);//以接口注册单例
}
else if (item.LiftTime == Lifetime.Transient)
{
container.Register(IType, type);//以接口注册多例
}
}
}
}
/// <summary>
/// 初始化程序集中所有标注为ExposedServiceAttriubute特性的类，要求单例具自动加载AutoInitialize=true
/// </summary>
/// <param name="container"></param>
/// <param name="assembly"></param>
public static void InitializeAssembly(this IContainerProvider container, Assembly assembly)
{
var list = GetTypes(assembly);
foreach (var item in list)
{
InitializeAssembly(container, item);
}
}
private static void InitializeAssembly(IContainerProvider container, Type type)
{
var list = GetExposedServices(type);
foreach (var item in list)
{
if (item.LiftTime == Lifetime.Singleton && item.AutoInitialize)
{
container.Resolve(type);
}
}
}
}

复制代码

[Module(ModuleName = ModuleName.ImageModuleProfile, OnDemand = true)]
public class ImageModuleProfile : IModule
{
public void OnInitialized(IContainerProvider containerProvider)
{
containerProvider.InitializeAssembly(Assembly.GetExecutingAssembly());
containerProvider.Resolve<IRegionManager>().RegisterViewWithRegion<ImageView>(ContentControlName.MainmoduleImagemoduleReginName);
}
public void RegisterTypes(IContainerRegistry containerRegistry)
{
containerRegistry.RegisterAssembly(Assembly.GetExecutingAssembly());
containerRegistry.RegisterForNavigation<ImageView, ImageViewModel>();
}
}

复制代码

/// <summary>
/// 显示16位探测器图像的模型
/// </summary>
[ExposedService(Lifetime.Singleton, typeof(IDetectorDisplayModel))]
public class DetectorDisplayModel : IDetectorDisplayModel
{
}

复制代码

[ExposedServiceAttribute(Lifetime.Singleton, AutoInitialize = true)]
public sealed class PrismProvider
{
public PrismProvider(
IContainerExtension container,
IRegionManager regionManager,
IDialogService dialogService,
IEventAggregator eventAggregator,
IModuleManager moduleManager)
{
LanguageManager = language;
Container = container;
RegionManager = regionManager;
DialogService = dialogService;
EventAggregator = eventAggregator;
ModuleManager = moduleManager;
}
/// <summary>
/// 容器
/// </summary>
public static IContainerExtension Container { get; private set; }
/// <summary>
/// 区域管理器接口
/// </summary>
public static IRegionManager RegionManager { get; private set; }
/// <summary>
/// 对话框管理器
/// </summary>
public static IDialogService DialogService { get; private set; }
/// <summary>
/// 事件聚合器
/// </summary>
public static IEventAggregator EventAggregator { get; private set; }
/// <summary>
/// 模块管理器
/// </summary>
public static IModuleManager ModuleManager { get; private set; }
}

复制代码

//第一步，加载模块
PrismProvider.ModuleManager.LoadModule(ModuleName.LoginModuleProfile);
//第二步，导航区域
PrismProvider.RegionManager.RequestNavigate(ContentControlName.MainWindowReginName, ViewNames.LoginView);

复制代码