Parse 诉 TryParse [英] Parse v. TryParse

问题描述

Parse() 和 TryParse() 有什么区别?

What is the difference between Parse() and TryParse()?

int number = int.Parse(textBoxNumber.Text);

// The Try-Parse Method
int.TryParse(textBoxNumber.Text, out number);

是否有某种形式的错误检查，例如 Try-Catch 块?

Is there some form of error-checking like a Try-Catch Block?

推荐答案

Parse 如果无法解析值会抛出异常，而 TryParse 返回 bool表示是否成功.

Parse throws an exception if it cannot parse the value, whereas TryParse returns a bool indicating whether it succeeded.

TryParse 不只是 try/catch 在内部 - 它的全部意义在于它是在没有异常的情况下实现的，因此速度很快.事实上，它最有可能实现的方式是，Parse 方法内部会调用 TryParse，然后如果返回 false 则抛出异常.

TryParse does not just try/catch internally - the whole point of it is that it is implemented without exceptions so that it is fast. In fact the way it is most likely implemented is that internally the Parse method will call TryParse and then throw an exception if it returns false.

简而言之，如果您确定该值有效，请使用 Parse；否则使用 TryParse.

In a nutshell, use Parse if you are sure the value will be valid; otherwise use TryParse.

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