在做练习的时候,小小项目,使用IOC控件觉得麻烦,使用工厂觉得不高大上啊,自己写个简陋的依赖注入IOC吧;
控制反转(IOC)是管理映射依赖的的,是依赖倒置(DIP)的实现方式;
依赖倒置(DIP)是设计原则,控制反转(IOC)是具体实现,依赖注入(DI)是控制反转的具体实现;
解决方案的目录:
IOC
有3个类,一个是用来保存依赖关系的实体类(EntityIOC),一个是保存依赖关系的类(InterviewsDependencyResolver),一个是外部调用类(InterviewsIOC);
我理解的核心就是依赖关系.使用反射实现依赖倒置.
EntityIOC 代码:
/// <summary>
/// 依赖注入实体
/// </summary>
internal class EntityIoc
{
private EntityIoc(){ }
public EntityIoc(string _namespace, string _fullName)
{
Namespace = _namespace;
FullName = _fullName;
}
/// <summary>
/// 程序集名称
/// </summary>
public string Namespace { get; set; }
/// <summary>
/// 实例名(不包括命名空间)
/// </summary>
public string FullName { get; set; }}
.csharpcode, .csharpcode pre
{
font-size: small;
color: black;
font-family: consolas, "Courier New", courier, monospace;
background-color: #ffffff;
/*white-space: pre;*/
}
.csharpcode pre { margin: 0em; }
.csharpcode .rem { color: #008000; }
.csharpcode .kwrd { color: #0000ff; }
.csharpcode .str { color: #006080; }
.csharpcode .op { color: #0000c0; }
.csharpcode .preproc { color: #cc6633; }
.csharpcode .asp { background-color: #ffff00; }
.csharpcode .html { color: #800000; }
.csharpcode .attr { color: #ff0000; }
.csharpcode .alt
{
background-color: #f4f4f4;
width: 100%;
margin: 0em;
}
.csharpcode .lnum { color: #606060; }
InterviewsDependencyResolver 代码:
/// <summary>
///容器
/// </summary>
internal class InterviewsDependencyResolver<IEntity> where IEntity : class
{
private InterviewsDependencyResolver() { }private static Dictionary<EntityIoc, EntityIoc> _dictIoc = new Dictionary<EntityIoc, EntityIoc>();
//private static Dictionary<Type, Type> accessDict = new Dictionary<Type, Type>();
public static EntityIoc Get()
{
Type ientity = typeof(IEntity);
//需要返回的值
EntityIoc iioc = new EntityIoc(ientity.Module.Name.Replace(".dll", ""), ientity.FullName);
//集合中的数据
iioc = _dictIoc.Keys.Where(a => a.FullName == iioc.FullName && a.Namespace == iioc.Namespace).FirstOrDefault();
if (iioc != null)
{
//根据Key返回集合中保存的实例信息
return _dictIoc[iioc];
}
return null;
}/// <summary>
/// 绑定
/// </summary>
/// <typeparam name="T"></typeparam>
public static void To<T>() where T : class
{
Type ientity = typeof(IEntity);
Type entity = typeof(T);
EntityIoc iioc = new EntityIoc(ientity.Module.Name.Replace(".dll", ""), ientity.FullName);
EntityIoc ioc = new EntityIoc(entity.Module.Name.Replace(".dll", ""), entity.FullName);
if (!_dictIoc.Keys.Contains(iioc))
{
_dictIoc.Add(iioc, ioc);
}
}
/// <summary>
/// 取消绑定
/// </summary>
/// <typeparam name="T"></typeparam>
public static void UninstallTo<T>() where T : class
{
Type ientity = typeof(IEntity);
EntityIoc iioc = new EntityIoc(ientity.Module.Name.Replace(".dll", ""), ientity.FullName);
//集合中的数据
iioc = _dictIoc.Keys.Where(a => a.FullName == iioc.FullName && a.Namespace == iioc.Namespace).FirstOrDefault();
if (iioc != null)
{
_dictIoc.Remove(iioc);
}
}}
InterviewsIOC 代码:
.csharpcode, .csharpcode pre
{
font-size: small;
color: black;
font-family: consolas, "Courier New", courier, monospace;
background-color: #ffffff;
/*white-space: pre;*/
}
.csharpcode pre { margin: 0em; }
.csharpcode .rem { color: #008000; }
.csharpcode .kwrd { color: #0000ff; }
.csharpcode .str { color: #006080; }
.csharpcode .op { color: #0000c0; }
.csharpcode .preproc { color: #cc6633; }
.csharpcode .asp { background-color: #ffff00; }
.csharpcode .html { color: #800000; }
.csharpcode .attr { color: #ff0000; }
.csharpcode .alt
{
background-color: #f4f4f4;
width: 100%;
margin: 0em;
}
.csharpcode .lnum { color: #606060; }
/// <summary>
/// 简单IOC
/// </summary>
public class InterviewsIOC
{
private InterviewsIOC() { }
/// <summary>
/// 绑定
/// </summary>
public static void Bing()
{
//配置文件读取或者直接绑定,如果是配置文件读取,需要先读取后反射为类(用来判断依赖是否正确)
InterviewsDependencyResolver<IAccountService>.To<Impl.AccountService>();
}
/// <summary>
/// 获取依赖中具体实现
/// </summary>
/// <typeparam name="IEntity"></typeparam>
/// <returns></returns>
public static IEntity LoadInstance<IEntity>() where IEntity : class
{
IEntity resultEntity = null;
EntityIoc ioc = InterviewsDependencyResolver<IEntity>.Get();
if (ioc != null)
{
try
{
//反射实现接口实例
resultEntity = (IEntity)Assembly.Load(ioc.Namespace).CreateInstance(ioc.FullName);
}
catch (Exception ex)
{throw;
}}
return resultEntity;
}}
程序使用:
.csharpcode, .csharpcode pre
{
font-size: small;
color: black;
font-family: consolas, "Courier New", courier, monospace;
background-color: #ffffff;
/*white-space: pre;*/
}
.csharpcode pre { margin: 0em; }
.csharpcode .rem { color: #008000; }
.csharpcode .kwrd { color: #0000ff; }
.csharpcode .str { color: #006080; }
.csharpcode .op { color: #0000c0; }
.csharpcode .preproc { color: #cc6633; }
.csharpcode .asp { background-color: #ffff00; }
.csharpcode .html { color: #800000; }
.csharpcode .attr { color: #ff0000; }
.csharpcode .alt
{
background-color: #f4f4f4;
width: 100%;
margin: 0em;
}
.csharpcode .lnum { color: #606060; }
Demo中的IOC自定义实现