在Powershell中将字符串转换为日期时间 [英] Converting string to date time in powershell

问题描述

我正在尝试解析文件名（字符串），并使用以下行将其转换为powershell中的日期：

I am trying to parse filenames (strings) and convert them to dates in powershell using the following line:

([datetime]::ParseExact($DirName.BaseName,'yyyyMMdd',$null)

问题是，而不是该目录中所有遵循该命名约定的文件夹。我将如何首先测试该文件夹是否符合命名约定，如果符合，则将其转换为日期时间对象？不胜感激。

The problem is, not all of the folders in that directory following that naming convention. How would I first test to see if the folder fits the naming convention and if it does, convert it to a date time object? Any help would be greatly appreciated.

推荐答案

我不会费心检查，只需将呼叫放入 try..catch 块。我建议使用 InvariantCulture 而不是 $ null 。

I wouldn't bother checking first. Just put the call in a try..catch block. I would recommend using InvariantCulture rather than $null, though.

$culture = [Globalization.CultureInfo]::InvariantCulture
try {
  [datetime]::ParseExact($DirName.BaseName, 'yyyyMMdd', $culture)
} catch {
  # not a valid date
}

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