public interface IReader
{DateTime GetCreatedOn();string Read();
}

DIP.Implementation.KeyboardReader.cs

public class KeyboardReader:IReader
{private DateTime _createdOn;public KeyboardReader(){_createdOn = DateTime.Now;}public DateTime GetCreatedOn(){return _createdOn;}public string Read(){return "Reading from \"Keyboard\"";}
}

同样，在DIP.Abstractions.IWriter.cs和DIP.Implementation.PrinterWriter.cs中进行更改。

class Program
{static void Main(string[] args){// Create the container objectContainer container = new Container();// Register all the dependenciesDIRegistration(container);// Prepare the first copy object and do the copy operationCopy copy = new Copy(container);copy.DoCopy();Console.ReadLine();// Prepare the second copy object and do the copy operationCopy copy2 = new Copy(container);copy2.DoCopy();Console.ReadLine();}static void DIRegistration(Container container){container.Register<IReader,KeyboardReader>();container.Register<IWriter,PrinterWrter>();}
}

通过运行该应用程序，您将获得类似的输出，如下所示：

public enum LifeTimeOptions
{TransientLifeTimeOption,ContainerControlledLifeTimeOption
}

public class ResolvedTypeWithLifeTimeOptions
{public Type ResolvedType { get; set; }public LifeTimeOptions LifeTimeOption { get; set; }public object InstanceValue { get; set; }public ResolvedTypeWithLifeTimeOptions(Type resolvedType){ResolvedType = resolvedType;LifeTimeOption = LifeTimeOptions.TransientLifeTimeOptions;InstanceValue = null;}public ResolvedTypeWithLifeTimeOptions(Type resolvedType, LifeTimeOptions lifeTimeOption){ResolvedType = resolvedType;LifeTimeOption = lifeTimeOption;InstanceValue = null;}
}

private Dictionary<Type, ResolvedTypeWithLifeTimeOptions> = new Dictionary<Type,ResolvedTypeWithLifeTimeOptions>();

接下来，我们需要更新DIP.MyIoCContainer.Container.cs的代码以支持LifeTimeOptions。

public class Container
{private Dictionary<Type, ResolvedTypeWithLifeTimeOptions> iocMap = new Dictionary<Type, ResolvedTypeWithLifeTimeOptions>();public void Register<T1, T2>(){Register<T1, T2>(LifeTimeOptions.TransientLifeTimeOptions);}public void Register<T1, T2>(LifeTimeOptions lifeTimeOption){if (iocMap.ContainsKey(typeof(T1))){throw new Exception(string.Format("Type {0} already registered.", typeof(T1).FullName));}ResolvedTypeWithLifeTimeOptions targetType = new ResolvedTypeWithLifeTimeOptions(typeof(T2), lifeTimeOption);iocMap.Add(typeof(T1), targetType);}public T Resolve<T>(){return (T)Resolve(typeof(T));}public object Resolve(Type typeToResolve){// Find the registered type for typeToResolveif (!iocMap.ContainsKey(typeToResolve))throw new Exception(string.Format("Can't resolve {0}. Type is not registered.", typeToResolve.FullName));ResolvedTypeWithLifeTimeOptions resolvedType = iocMap[typeToResolve];// Step-1: If LifeTimeOption is ContainerControlled and there is //already an instance created then return the created instance.if (resolvedType.LifeTimeOption == LifeTimeOptions.ContainerControlledLifeTimeOptions && resolvedType.InstanceValue != null)return resolvedType.InstanceValue;// Try to construct the object// Step-2: find the constructor //(ideally first constructor if multiple constructors present for the type)ConstructorInfo ctorInfo = resolvedType.ResolvedType.GetConstructors().First();// Step-3: find the parameters for the constructor and try to resolve thoseList<ParameterInfo> paramsInfo = ctorInfo.GetParameters().ToList();List<object> resolvedParams = new List<object>();foreach (ParameterInfo param in paramsInfo){Type t = param.ParameterType;object res = Resolve(t);resolvedParams.Add(res);}// Step-4: using reflection invoke constructor to create the objectobject retObject = ctorInfo.Invoke(resolvedParams.ToArray());resolvedType.InstanceValue = retObject;return retObject;}
}

在上面的代码中，我们修改了现有Register方法，并且还有另一个重载Register方法，它只是更新了解析类型的LifeTimeOption属性。

static void DIRegistration(Container container)
{container.Register<IReader, KeyboardReader>(LifeTimeOptions.ContainerControlledLifeTimeOption);container.Register<IWriter, PrinterWriter>(LifeTimeOptions.TransientLifeTimeOption);
}

请注意我已经给了IReader依赖LifeTimeOptions.ContainerControlledLifeTimeOption和IWriter依赖LifeTimeOptions.TransientLifeTimeOption。

static void Main(string[] args)
{// Create the container objectContainer container = new Container();// Register all the dependenciesDIRegistration(container);// Prepare the first copy object and do the copy operationCopy copy = new Copy(container);copy.DoCopy();Console.ReadLine();// Prepare the second copy object and do the copy operationCopy copy2 = new Copy(container);copy2.DoCopy();Console.ReadLine();
}

让我们尝试运行代码：