'POCO' 定义

本文介绍了'POCO' 定义的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

有人可以定义POCO"的确切含义吗?我越来越频繁地遇到这个词，我想知道它是否仅与普通类有关，还是意味着更多?

Can someone define what exactly 'POCO' means? I am encountering the term more and more often, and I'm wondering if it is only about plain classes or it means something more?

推荐答案

Plain Old C# Object"

"Plain Old C# Object"

只是一个普通的类，没有描述基础设施问题或域对象不应该具有的其他职责的属性.

Just a normal class, no attributes describing infrastructure concerns or other responsibilities that your domain objects shouldn't have.

编辑 - 正如其他答案所述，从技术上讲，它是普通的旧 CLR 对象"，但我和大卫·阿诺的评论一样，更喜欢普通的旧类对象"以避免与特定语言或技术的联系.

EDIT - as other answers have stated, it is technically "Plain Old CLR Object" but I, like David Arno comments, prefer "Plain Old Class Object" to avoid ties to specific languages or technologies.

澄清:换句话说，它们不是源自一些特殊的基类，它们也不为它们的属性返回任何特殊类型.

TO CLARIFY: In other words, they don’t derive from some special base class, nor do they return any special types for their properties.

请参阅下面的示例.

POCO 示例:

public class Person { public string Name { get; set; } public int Age { get; set; } }

非 POCO 的示例:

Example of something that isn’t a POCO:

public class PersonComponent : System.ComponentModel.Component { [DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)] public string Name { get; set; } public int Age { get; set; } }

上面的例子都继承自一个特殊的类来赋予它额外的行为以及使用自定义属性来改变行为……两个类都存在相同的属性，但一个不只是一个普通的老物件了.

The example above both inherits from a special class to give it additional behavior as well as uses a custom attribute to change behavior… the same properties exist on both classes, but one is not just a plain old object anymore.