在同一单位的类方法中使用属性而不是字段是不好的做法？ [英] Using properties instead of fields in class methods of the same unit is a bad practice?

问题描述

我已经为给定的类宣布了一个私有字段和一个公共属性。

从其他单位可以通过提供访问权限的公共属性来访问该字段

但是在同一个单元中声明此类的内容，我可以选择通过属性直接访问该字段或。

建议的最佳做法是什么？直接读/写字段或通过提供读写权限的属性？

解决方案

与 David的味道相反，我总是使用私人/受保护的字段，但只能在同一个类（私人时）内或派生中（当被保护时）。这个原因对我而言是可读性的：<​​/ p>

• 现在，FCount读为Count，


• 使用私有领域可以清楚地表明我在内部工作，


• 在我使用该属性的零星情况下，显然我需要以触发设置者或吸气剂。

这里的关键点是一致。选择一个，并坚持下去。

由于Jerry的评论而更新：

关于一致的观点是对每个人自己的利益的一般建议。使用一个默认语法来自定义你的代码，你的代码在你的余生中将是清晰的（对你而言）。

当然，当您选择使用私有字段时，会出现偶然情况，您必须使用该属性。但是这反过来也适用：如果您选择使用该属性，则会出现必须使用私有字段的情况。我只是说，当你坚持使用系统时，例外情况将会更清楚地看起来像是例外。

I have declared a private field and a public property for a given class.

From other units I can access the field through the public property that provides access to it.

But inside the same unit where this class is declared I have the choice to access the field directly or through the property.

What is the suggested best practice: direct read/write to the field or through the property that provides read and write access to it?

解决方案

Contrary to David's taste, I always use the private/protected field, but only within the same class (when private) or within a derivative (when protected). Strangly enough, the reason is readability for me too:

• By now, FCount reads as Count,
• Using the private field makes it clear I am working on internals,
• And in the sporadic situation where I use the property, then it is obvious that I need to trigger the setter or getter behind it.

The key point here is being consistent. Choose one, and stick to it. There is no right nor wrong.

Update due to Jerry's comment:

My point about being consistent is a general advise for everyone's own benefit. Accustom yourself with one default syntax, and your code will be crystal clear (to you I mean) for the rest of your life.

Of course, when you choose using private fields, there will be incidental situations you must use the property instead. But this applies vice versa: if you choose to use the property, then there will be situations you have to use the private field. I am only saying that when you stick to a system, the exceptions will more clearly look like exceptions.

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