当你应该使用一个领域，而不是财产？ [英] When should you use a field rather than a property?

问题描述

当你使用一个字段，当一流的设计使用的属性？任何人都可以清楚地说明

Can anyone clearly articulate when you use a field and when to use a property in class design?

考虑：

public string Name;

或者

private string _Name;
public string Name
{
   get { return _Name; }
   set { _Name = value; }
}

我认识到，第二种方法是更恰当和灵活的，所以这就是我尝试使用，一般

I realize that the second method is more proper and flexible, so that's what I try to use, generally.

既然这样，为什么我看到人们用第一种方法？他们只是懒惰，或者是有它的正确选择某些特定的情况吗？难道仅仅是一个preference的事？

But then why do I see people use the first method? Are they just lazy, or is there some specific situation where it's the correct choice? Is it just a matter of preference?

推荐答案

好吧在C＃3.0，你可以实际编写：

Well in C# 3.0 you can actually write:

public string Name {get; set;}

允许你有适当的和懒惰。

Which allows you to be proper and lazy.

一般来说，具有属性，你会得到正确的封装。您可以选择是允许设置一个值，或者得到它，或两者兼而有之。使用公共成员，你没有这样的选择。

Generally speaking, with properties, you get proper encapsulation. You have the choice to allow setting a value, or getting it, or both. Using a public member, you don't have that option.

这可能是一个部分preference，一个部分你的团队如何决定处理快速和肮脏的类定义，但我要说，使用属性的get /套。

It's probably one-part preference, and one-part how your team decides to handle quick and dirty class definitions, but I would say, use properties for get/sets.

要回答

当你使用一个属性，当一流的设计使用的属性？任何人都可以清楚地说明

Can anyone clearly articulate when you use an attribute and when to use a property in class design?

您应该永远不会使用公共属性。你应该总是使用属性。它是更安全，更灵活。这就是说，人们会偷懒，只是使用一个公共成员。然而，C＃3.0，你可以用更简洁的语法定义属性，它应该满足你内心的懒惰。

You shouldn't ever use a public attribute. You should always use a property instead. It's safer and more flexible. That said, people will be lazy, and just use a public member. However, with C# 3.0 you can use a more terse syntax to define properties, which should satisfy your inner laziness.

只需输入托，并按＆LT;标签＆gt; 来加快在添加一个属性懒惰

Simply type prop and hit <tab> to expedite the laziness in adding a property.

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