从“yyyymmdd"更改日期格式到“mm/dd/yyyy" [英] Change date format from "yyyymmdd" to "mm/dd/yyyy"

问题描述

我尝试了很多不同的方法，但似乎都做对了.

I've tried a lot of different ways and I can't seem to get it right.

这是我迄今为止尝试过的代码...

Here is the code of what I have tried so far...

[String]$dateValue = '20161212'
[String]$dateStamp = $dateValue -f (Get-Date)
[String]$dateStamp2 = ([datetime]::parseexact($dateValue, "yyyyMMdd", [System.Globalization.CultureInfo]::InvariantCulture)).Date
[String]$dateStamp3 = ([datetime]::FromFileTime($dateValue)).ToString('g')

Write-Host '$dateStamp  = ' $dateStamp
Write-Host '$dateStamp2 = ' $dateStamp2
Write-Host '$dateStamp3 = ' $dateStamp3

当前代码输出

$dateStamp = 20161212
$dateStamp2 = 12/12/2016 00:00:00
$dateStamp3 = 12/31/1600 5:00 PM

所需的代码输出

$dateStamp = 12/12/2016

有什么想法吗?

推荐答案

一旦您有了 datetime 对象，就可以轻松地将其转换为您需要的任何字符串格式.您与第二次尝试非常接近.添加 ToString 允许您指定字符串格式.

Once you have a datetime object it's easy to convert it to whatever string format you need. You are so close with your second attempt. Adding ToString allows you to specify a string format.

([datetime]::parseexact($dateValue, "yyyyMMdd", [System.Globalization.CultureInfo]::InvariantCulture)).ToString("dd/MM/yyyy")

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