代码分析返回有关不使用“ out”消息的建议。参数 [英] Code analysis comes back with suggestion about not using "out" parameters

问题描述

我对我创建的对象运行了VS 2008代码分析工具，并收到以下建议...

I ran the VS 2008 code analysis tool against an object I created and received the following suggestion ...

警告147 CA1021： Microsoft.Design
：考虑一个不要求
要求'returnValue'是out
参数的设计。

Warning 147 CA1021 : Microsoft.Design : Consider a design that does not require that 'returnValue' be an out parameter.

我发现输出参数非常有用，并且没有意识到它们在设计实践中被视为皱眉。我想知道是否有人可以阐明我收到此警告的原因？如果是不好的做法？为什么？

I find "out" parameters rather useful and didn't realize that they were considered as a frowned upon design practice. I wanted to know if someone could shed some light on the reason that I received this Warning? If it is bad practice? why? and what would be good practice?

我很感谢您提出任何建议。

I appreciate any advice.

推荐答案

每个代码分析警告都有相关的文档，您可以通过将警告突出显示并按 F1 来访问。您还可以右键单击该项目以获取帮助。

Every Code Analysis warning has associated documentation that you can access by highligting the warning and pressing F1. You can also right-click on the item to get help.

无论如何，这是解释该警告的文档。

我会说有几种情况参数仍然是一个不错的选择-特别是在谈到TryParse编码习惯时，因为它是一种行之有效的方式，大多数人都应该理解它。

I would say that there are a few cases where out parameters are still a good choice - particularly when it comes to the TryParse coding idiom, because it's such a well-established way of doing things that most people are supposed to understand it

但是，在一般情况下，对于多个返回值，有更好的，面向对象的解决方案。

In general use, however, there are better, more object-oriented solutions to multiple return values.

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