公共属性的默认值 [英] Default value for public properties

问题描述

我在某堂课上有公共财产.我想要此属性的默认值-1，而没有_MyField之类的私有变量(因为此类中的属性太多，因此我不会一一添加它们).

I have a public property in some class. I want a default value -1 for this property without an private variable like _MyField(because too many properties in this class, i won't add them one by one).

public int MyProperty { get; set; }

我认为

[DefaultValueAttribute]无法解决此问题.有任何想法吗?谢谢.

[DefaultValueAttribute] is not working for this issue i think. Any ideas? Thanks.

更新@ 2015年8月现在我们有了C#6！

UPDATE @ Aug 2015 Now we have C# 6!

public int MyProperty { get; set; } = 100;

public string EasyToUse { get; } = "YES!";

推荐答案

您基本上有两个选择-您可以在对象的构造函数中设置属性，也可以使用私有字段.

You basically have two options - you can set the property in the constructor of the object, or use a private field.

我个人认为，构造函数是最好的选择，因为人们很容易阅读您的代码，对于类的新实例您的意图是什么.

Personally, I feel the constructor is the best option, as it's clear to people reading your code what your intentions are for a fresh instance of your class.

[DefaultValue] 是用于可视设计器功能的属性，对您的类逻辑没有影响.

[DefaultValue] is an attribute meant for use with visual designer functionality, and has no effect on your class logic.

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