将Y或N转换为布尔C＃ [英] Casting Y or N to bool C#

问题描述

为了简洁起见，我想知道是否可以将Y或N转换为布尔值？像这样;

Just for neatness sake I was wondering, whether it's possible to cast Y or N to a bool? Something like this;

bool theanswer = Convert.ToBoolean(input);

长版本；

bool theanswer = false;
switch (input)
{
   case "y": theanswer = true; break;
   case "n": theanswer = false; break
}

推荐答案

不，没有构建任何东西

但是，鉴于您要默认为false，您可以使用：

However, given that you want to default to false, you can just use:

bool theAnswer = (input == "y");

（这里的括号只是为了清楚起见。）

(The bracketing there is just for clarity.)

考虑到问题文本和所获得的代码之间的差异，您可能要考虑使其不区分大小写。一种方法是：

You may want to consider making it case-insensitive though, given the difference between the text of your question and the code you've got. One way of doing this:

bool theAnswer = "y".Equals(input, StringComparison.OrdinalIgnoreCase);

请注意，使用指定的字符串比较可避免创建新字符串，这意味着您不需要当然，您会担心文化问题...除非您想要进行文化敏感的比较。还要注意，我已将文字作为方法调用的目标，以避免在输入 NullReferenceException >为 null 。

Note that using the specified string comparison avoids creating a new string, and means you don't need to worry about cultural issues... unless you want to perform a culture-sensitive comparison, of course. Also note that I've put the literal as the "target" of the method call to avoid NullReferenceException being thrown when input is null.

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