c#自定义Attribute获取接口实现

刺骨的言语ヽ痛彻心扉 2021-10-26 14:28 315阅读 0赞

[c\#自定义Attribute获取接口实现][c_Attribute]

原文: [c\#自定义Attribute获取接口实现][c_Attribute 1]

一般的接口实现多态

定义接口

interface Ipeople
        {
            void say();
        }

定义实现的类

public class man : Ipeople
        {
            public void say()
            {
                MessageBox.Show("man");
            }
        }
    
     public class woman : Ipeople
        {
            public void say()
            {
                MessageBox.Show("woman");
            }
        }

一般实现的方法

![1003023-20190418154501736-1094143035.png][]

升级版

添加自定义（这个网上好多）

![1003023-20190418160217697-508463354.png][]

实现类

![1003023-20190418160319495-341774661.png][]![1003023-20190418160337989-974185187.png][]

调用方法

private static void NewMethod(string tpye)
            {
                Ipeople ib = null;
                var types = AppDomain.CurrentDomain.GetAssemblies()
                            .SelectMany(a => a.GetTypes().Where(t => t.GetInterfaces().Contains(typeof(Ipeople))))
                            .ToArray();
                foreach (var v in types)
                {
                    var attribute = v.GetCustomAttributes(typeof(NameAttribute), false).FirstOrDefault();
                    if (attribute != null && ((NameAttribute)attribute).Name == tpye)
                    {
                        ib = (Ipeople)v.Assembly.CreateInstance(v.FullName);
                        break;
                    }
                }
                if (ib != null) ib.say();
            }

这个可以避免需要维护swich语句

posted on 2019-08-08 22:43  [NET未来之路][NET] 阅读( ...) 评论( ...) [ 编辑][Link 1] 收藏

转载于:https://www.cnblogs.com/lonelyxmas/p/11324355.html

[c_Attribute]: https://www.cnblogs.com/lonelyxmas/p/11324355.html
[c_Attribute 1]: https://www.cnblogs.com/zszh/p/10730260.html
[1003023-20190418154501736-1094143035.png]: /images/20211026/7b66bb69ccc14f0ba8425dee559fce8e.png
[1003023-20190418160217697-508463354.png]: /images/20211026/296e245a866b46d1a2c252171d7a5f88.png
[1003023-20190418160319495-341774661.png]: https://img2018.cnblogs.com/blog/1003023/201904/1003023-20190418160319495-341774661.png
[1003023-20190418160337989-974185187.png]: /images/20211026/8963637b67d445ecacbb702d36c1f0e6.png
[NET]: https://www.cnblogs.com/lonelyxmas/
[Link 1]: https://i.cnblogs.com/EditPosts.aspx?postid=11324355