Unity Application Block 学习笔记 之 BuildUp方法

1、不使用BuildUp方法

class Program

{

static void Main(string[] args)

{

IUnityContainer container = new UnityContainer();

Fighter you = new Fighter();

you.AK47.Fire(); //抛出异常，AK47属性为null

Console.Read();

}

}

public class Gun

{

public void Fire()

{

Console.WriteLine("砰砰砰");

}

}

public class Fighter

{

public Gun AK47 { get; set; }

}

2、使用Dependency+BuildUp
class Program

{

static void Main(string[] args)

{

IUnityContainer container = new UnityContainer();

container.RegisterType<Fighter>();

Fighter you = new Fighter();

container.BuildUp(you);

you.AK47.Fire(); //"砰砰砰

Console.Read();

}

}

public class Gun

{

public void Fire()

{

Console.WriteLine("砰砰砰");

}

}

public class Fighter

{
[Dependency]

public Gun AK47 { get; set; }

}

3、使用Dependency很方便，但是如果Fighter类不是你写的，而是来自第三方类库，那么没有办法加此特性，需要使用运行时的属性注入InjectionProperty
class Program

{

static void Main(string[] args)

{

IUnityContainer container = new UnityContainer();

container.RegisterType<Fighter>(new InjectionProperty("AK47")); //可以接受多个InjectionProperty

Fighter you = new Fighter();

container.BuildUp(you);

you.AK47.Fire();

Console.Read();

}

}

public class Gun

{

public void Fire()

{

Console.WriteLine("砰砰砰");

}

}

public class Fighter

{

public Gun AK47 { get; set; }

}

4、结束语
如果在Fighter中定义两个属性，一个使用Dependency特性注入，另一个使用运行时注入，则使用Dependency特性注入的属性将会失败