<笔记>TryParse

最新推荐文章于 2023-08-21 23:39:31 发布

原创最新推荐文章于 2023-08-21 23:39:31 发布 · 378 阅读

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本文介绍了如何使用TryParse方法来高效地验证一个字符串是否为有效的数值类型表示。此方法不仅适用于基本的数值类型，还适用于如DateTime和IPAddress等类型。相较于抛出异常的Parse方法，TryParse提供了一种更优的性能选择。

To determine whether a string is a valid representation of a specified numeric type, use the staticTryParse method that is implemented by all primitive numeric types and also by types such asDateTime andIPAddress. The following example shows how to determine whether "108" is a validint.

Robust Programming

Primitive numeric types also implement the Parse static method, which throws an exception if the string is not a valid number.TryParse is generally more efficient because it just returns false if the number is not valid.

Security

Always use the TryParse or Parse methods to validate user input from controls such as text boxes and combo boxes.