如何避免财产递归 [英] How to avoid property recursion

问题描述

这最近在我正在进行的一个项目中给我带来了打击.大多数人都熟悉财产递归:

This hit me recently on a project I was working on. Most people are familiar with property recursion:

public int Test 
{
   get { return this.test; }
   set { this.Test = value; }
}
private int test;

您不小心将一个大写的T放在了此setter中，并且已经对 StackoverflowException 敞开心yourself.更糟糕的是，如果您没有定义它，Visual Studio经常会自动将外壳改正为无效状态.

You accidentally put an upper-case T in this setter, and you've opened yourself up to a StackoverflowException. What's worse is if you've not defined it, often visual studio will auto-correct the casing for you to the invalid state.

最近我在构造函数中做了类似的事情:

I did something similar however in a constructor recently:

public TestClass(int test)
{
    this.Test = Test;
}

不幸的是，在这里您没有StackOverflowException，现在您遇到了编程错误.在我的情况下，该值传递给WebService，而该WebService却使用默认值(不为0)，这使我错过了我错误分配了它的事实.集成测试全部通过，因为此服务未显示

Unfortunately here you don't get a StackOverflowException, now you've got a programming error. In my case this value was passed to a WebService that instead used a default value (which wasn't 0) which caused me to miss the fact I had incorrectly assigned it. Integration tests all passed because this service didn't say

嘿，您忘记了这个非常重要的领域！"

"Hey you forgot this really important field!"

我可以采取哪些步骤来避免这种行为?始终建议我不要定义以下变量，并且我个人不喜欢它们，但是我想不出任何其他选择:

What steps can I take to avoid this sort of behaviour? I've always been advised against defining variables like the following, and I don't like them personally, but I can't think of any other options:

private int _test;
private int mTest;

编辑

下划线或m前缀通常是我不希望看到的，原因是:

Reasons that the underscore or m prefix are undesirable normally that I can think of are:

• 可读性
• 如果您是从3rd party类继承而来的，则滚动各种成员会更加困难，因为您会混合使用样式.

推荐答案

最好的方法是在此处使用自动实现的属性".

Best way is to use "Auto implemented properties" here.

public int Test { get; set; }

如果由于某种原因无法使用自动实现的属性"，请使用 _ 前缀(不过，我不喜欢).

If not possible to use "Auto implemented properties" for some reason use _ prefix(I don't prefer though).

如果您也不希望使用某些前缀，那么您还有其他选择.您不必手动编写属性代码.让IDE为您完成；这样，您可以避免粗心的错误.(我不知道我是怎么在原始答案中错过这个的)

If you also don't prefer to use some prefixes, then you have other option. You don't have to write the property code by hand. Let the IDE do it for you; that way you can avoid careless mistakes. (I don't know how I missed this in original answer)

只需输入

private int test;

选择字段，右键单击重构"->封装字段".IDE将为您生成属性片段，如下所示.

Select the field, Right click Refactor->Encapsulate Field. IDE will generate property snippet for you as below.

public int Test
{
    get { return test; }
    set { test = value; }
}

您无需费力单击上下文菜单.如果您更喜欢键盘，快捷方式是 Ctrl + R + E .

You don't need to bother clicking the context menu. If you prefer keyboard, shortcut is Ctrl + R + E.

或者得到一个Resharper，它将立即指出您的愚蠢错误.

Or get a Resharper, It will point your silly mistake immediately.

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