当使用C＃中的“继续”关键字 [英] When to use the 'continue' keyword in C#

问题描述

最近，我正在经历一个开源项目，虽然我一直在开发数年的.NET，我还没有穿过的的 继续 之前的关键字。

Recently, I was going through an open-source project and although I have been developing for several years in .NET, I hadn't stumbled across the continue keyword before.

问：什么是一些最佳做法或将受益于使用继续关键字的地方？有没有可能是我见过的一个原因是previously？

Question: What are some best practices or areas that would benefit from using the continue keyword? Is there a reason I might not have seen it previously?

推荐答案

您用它来立即退出本次循环，开始下一个（如果适用）。

You use it to immediately exit the current loop iteration and begin the next, if applicable.

foreach (var obj in list)
{
    continue;

    var temp = ...; // this code will never execute
}

A 继续通常依赖于一个条件，并且条件通常可以代替使用的继续 ;

A continue is normally tied to a condition, and the condition could usually be used in place of the continue;

foreach (var obj in list)
{ 
    if (condition)
       continue;

    // code
} 

可能只是写成

Could just be written as

foreach (var obj in list)
{
    if (!condition)
    {
        // code
    }
}

继续变得更有吸引力，如果你可能有几个层次的嵌套，如果逻辑循环中。 A 继续代替嵌套可能使code更具可读性。当然，重构循环和条件语句插入适当的方法也使循环更加易读。

continue becomes more attractive if you might have several levels of nested if logic inside the loop. A continue instead of nesting might make the code more readable. Of course, refactoring the loop and the conditionals into appropriate methods would also make the loop more readable.

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