Dependency injection Windows Phone 7的依赖项注入

我试图在我的Windows Phone 7项目中使用Unity 2.0 beta 2 for Silverlight，但我不断遇到以下问题：

Microsoft.Practices.Unity.Silverlight.dll！Microsoft.Practices.ObjectBuilder2.DynamicMethodConstructorStrategy.DynamicMethodConstructorStrategy（）+0x1f字节

Microsoft.Practices.Unity.Silverlight.dll!Microsoft.Practices.ObjectBuilder2.DynamicMethodConstructorStrategy.DynamicMethodConstructorStrategy() + 0x1f bytes mscorlib.dll!System.Reflection.RuntimeConstructorInfo.InternalInvoke(System.Reflection.RuntimeConstructorInfo rtci = {System.Reflection.RuntimeConstructorInfo}, System.Reflection.BindingFlags invokeAttr = Default, System.Reflection.Binder binder = null, object parameters = {object[0]}, System.Globalization.CultureInfo culture = null, bool isBinderDefault = false, System.Reflection.Assembly caller = null, bool verifyAccess = true, ref System.Threading.StackCrawlMark stackMark = LookForMyCaller) mscorlib.dll!System.Reflection.RuntimeConstructorInfo.InternalInvoke(object obj = null, System.Reflection.BindingFlags invokeAttr = Default, System.Reflection.Binder binder = null, object[] parameters = {object[0]}, System.Globalization.CultureInfo culture = null, ref System.Threading.StackCrawlMark stackMark = LookForMyCaller) + 0x103 bytes mscorlib.dll!System.Activator.InternalCreateInstance(System.Type type = {Name = "DynamicMethodConstructorStrategy" FullName = "Microsoft.Practices.ObjectBuilder2.DynamicMethodConstructorStrategy"}, bool nonPublic = false, ref System.Threading.StackCrawlMark stackMark = LookForMyCaller) + 0xf0 bytes mscorlib.dll!System.Activator.CreateInstance() + 0xc bytes Microsoft.Practices.Unity.Silverlight.dll!Microsoft.Practices.ObjectBuilder2.StagedStrategyChain.AddNew(Microsoft.Practices.Unity.ObjectBuilder.UnityBuildStage stage = Creation) + 0x1d bytes Microsoft.Practices.Unity.Silverlight.dll!Microsoft.Practices.Unity.UnityDefaultStrategiesExtension.Initialize() + 0x6c bytes Microsoft.Practices.Unity.Silverlight.dll!Microsoft.Practices.Unity.UnityContainerExtension.InitializeExtension(Microsoft.Practices.Unity.ExtensionContext context = {Microsoft.Practices.Unity.UnityContainer.ExtensionContextImpl}) + 0x31 bytes Microsoft.Practices.Unity.Silverlight.dll!Microsoft.Practices.Unity.UnityContainer.AddExtension(Microsoft.Practices.Unity.UnityContainerExtension extension = {Microsoft.Practices.Unity.UnityDefaultStrategiesExtension}) + 0x1a bytes Microsoft.Practices.Unity.Silverlight.dll!Microsoft.Practices.Unity.UnityContainer.UnityContainer() + 0xf bytes Microsoft.Practices.Unity.Silverlight.dll！Microsoft.Practices.ObjectBuilder2.DynamicMethodConstructorStrategy.DynamicMethodConstructorStrategy（）+0x1f字节mscorlib.dll！System.Reflection.RuntimeConstructorInfo.InternalInvoke（System.Reflection.RuntimeConstructorInfo rtci={System.Reflection.RuntimeConstructorInfo}，System.Reflection.BindingFlags invokeAttr=Default，System.Reflection.Binder=null，对象参数={object[0]}，System.Globalization.CultureInfo culture=null，bool-isBinderDefault=false，System.Reflection.Assembly caller=null，bool-verifyAccess=true，ref-System.Threading.stackcrawmark-stackMark=LookForMyCaller） mscorlib.dll！System.Reflection.RuntimeConstructorInfo.InternalInvoke（对象obj=null，System.Reflection.BindingFlags invokeAttr=Default，System.Reflection.Binder Binder=null，对象[]参数={object[0]}，System.Globalization.CultureInfo culture=null，ref System.Threading.StackScrawmark stackMark=LookForMyCaller）+0x103字节 mscorlib.dll！System.Activator.InternalCreateInstance（System.Type={Name=“DynamicMethodConstructorStrategy”FullName=“Microsoft.Practices.ObjectBuilder2.DynamicMethodConstructorStrategy”}，bool nonPublic=false，ref System.Threading.stackcrawmark stackMark=LookForMyCaller）+0xf0字节mscorlib.dll！System.Activator.CreateInstance（）+0xc字节 Microsoft.Practices.Unity.Silverlight.dll！Microsoft.Practices.ObjectBuilder2.StagedStrategyChain.AddNew（Microsoft.Practices.Unity.ObjectBuilder.UnityBuildStage=Creation）+0x1d字节 Microsoft.Practices.Unity.Silverlight.dll！Microsoft.Practices.Unity.UnityDefaultStrategiesExtension.Initialize（）+0x6c字节 Microsoft.Practices.Unity.Silverlight.dll！Microsoft.Practices.Unity.UnityContainerExtension.InitializeExtension（Microsoft.Practices.Unity.ExtensionContext上下文={Microsoft.Practices.Unity.UnityContainer.ExtensionContextImpl}）+0x31字节 Microsoft.Practices.Unity.Silverlight.dll！Microsoft.Practices.Unity.UnityContainer.AddExtension（Microsoft.Practices.Unity.UnityContainerExtension扩展={Microsoft.Practices.Unity.UnityDefaultStrategiesExtension}）+0x1a字节 Microsoft.Practices.Unity.Silverlight.dll！Microsoft.Practices.Unity.UnityContainer.UnityContainer（）+0xf字节 我想我能解决这个问题，我试了几次，但都没有用

事实证明，这是一个相当基本的问题，我认为WindowsPhone7是Silverlight3+以及其他一些东西是错误的。这描述了Mobile Silverlight和Silverlight 3之间的区别

特别令人感兴趣的是：

Silverlight for Windows Phone不支持System.Reflection.Emit命名空间

这正是Unity在手机上崩溃的原因，

DynamicMethodConstructorStrategy

类广泛使用了

System.Reflection.Emit

---

所以问题是，Windows Phone 7有什么替代Unity的方法呢？

如果你找不到一个可以在Windows Phone 7上运行的IOC容器（我也不奇怪你不能），那么我建议使用它。

因此，本着回答我自己问题的精神，我准备了一个简单的DI容器（使用

Activator.CreateInstance

进行实例化）。所有这些都支持类型注册和实例注册

似乎正在做这项工作。稍后会担心性能

public class DuplicateRegistrationException : Exception {
    public DuplicateRegistrationException() { }
    public DuplicateRegistrationException(string message) : base(message) { }
    public DuplicateRegistrationException(string message, Exception inner) : base(message, inner) { }
}

public interface IDIContainer {
    void Register<TIntf, TClass> () where TIntf: class where TClass : TIntf;
    TIntf Resolve<TIntf>() where TIntf : class;
    void RegisterInstance<TIntf>(TIntf instance);
}

public class DIContainer :  IDIContainer{

    Dictionary<Type, Type> m_TypeRegistrations;
    Dictionary<Type, object> m_InstanceRegistrations;

    public DIContainer() {
        m_TypeRegistrations = new Dictionary<Type, Type>();
        m_InstanceRegistrations = new Dictionary<Type, object>();
    }

    #region IDIContainer Members

    public void Register<TIntf, TClass>()
        where TIntf : class
        where TClass : TIntf {
            if(DoesRegistrationExist<TIntf>())
                throw new DuplicateRegistrationException("Can only contain one registration per type");
            m_TypeRegistrations.Add(typeof(TIntf), typeof(TClass));
    }

    public TIntf Resolve<TIntf>() where TIntf : class {
        return Resolve(typeof(TIntf)) as TIntf;
    }

    private object Resolve(Type type) {
        if(!m_TypeRegistrations.ContainsKey(type)) {
            if(!m_InstanceRegistrations.ContainsKey(type))
                throw new NotSupportedException("Cannot find registration for type " + type.FullName + ".");
            else
                return m_InstanceRegistrations[type];
        } else {
            var createdType = m_TypeRegistrations[type];

            ConstructorInfo[] constructors = createdType.GetConstructors();
            ConstructorInfo mostSpecificConstructor = null;
            foreach(var c in constructors) {
                if(mostSpecificConstructor == null || mostSpecificConstructor.GetParameters().Length < c.GetParameters().Length) {
                    mostSpecificConstructor = c;
                }
            }

            List<object> constructorParameters = new List<object>();
            foreach(var a in mostSpecificConstructor.GetParameters()) {
                constructorParameters.Add(Resolve(a.ParameterType));
            }

            return Activator.CreateInstance(createdType, constructorParameters.ToArray());
        }
    }

    private bool DoesRegistrationExist<T>() {
        return m_InstanceRegistrations.ContainsKey(typeof(T)) || m_TypeRegistrations.ContainsKey(typeof(T));
    }

    public void RegisterInstance<TIntf>(TIntf instance) {
        if(DoesRegistrationExist<TIntf>()) {
            throw new DuplicateRegistrationException("Can only contain one registration per type");
        }
        m_InstanceRegistrations.Add(typeof(TIntf), instance);
    }


    #endregion

公共类DuplicateRegistrationException:异常{
公共重复注册异常（）{}
PublicDuplicateRegistrationException（字符串消息）：基（消息）{}
公共DuplicateRegistrationException（字符串消息，内部异常）：基（消息，内部）{}
}
公共接口容器{
无效寄存器（），其中TIntf:class，其中TClass:TIntf；
TIntf Resolve（），其中TIntf:class；
无效注册表状态（TIntf实例）；
}
公共类双容器：IDIContainer{
字典m_类型注册；
字典m_InstanceRegistration；
公共双容器（）{
m_TypeRegistrations=新字典（）；
m_InstanceRegistrations=新字典（）；
}
#区域容器成员
公开作废登记册（）
TIntf:类在哪里
其中TClass:TIntf{
如果（DoesRegistrationExist（））
抛出新的DuplicateRegistrationException（“每个类型只能包含一个注册”）；
m_TypeRegistrations.Add（typeof（TIntf），typeof（TClass））；
}
public TIntf Resolve（），其中TIntf:class{
将解析（typeof（TIntf））返回为TIntf；
}
私有对象解析（类型）{
如果（！m_TypeRegistrations.ContainsKey（类型））{
如果（！m_InstanceRegistrations.ContainsKey（类型））
抛出新的NotSupportedException（“找不到类型“+type.FullName+”的注册”）；
其他的
返回m_InstanceRegistrations[类型]；
}否则{
var createdType=m_TypeRegistrations[type]；
ConstructorInfo[]构造函数=createdType.GetConstructors（）；
ConstructorInfo MOSTSSpecificConstructor=null；
foreach（构造函数中的var c）{
if（mostSpecificConstructor==null | | mostSpecificConstructor.GetParameters（）.Length