比较2个日期并输出所有过去的日期 (PowerShell)

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英文:

Compare 2 dates and output all past dates (powershell)

问题

我有一个关于我的PowerShell脚本的问题。我导入了一个包含不同日期的CSV文件,然后与今天的日期进行比较。

我不知道为什么,但我从CSV文件中得到了3个将来的日期。

脚本:

$InfoCSV = Import-Csv -Path "C:\Script\BDR\Info.csv" -Delimiter ";"
$Date = Get-Date
$today = (Get-Date -format dd.MM.yyyy)

foreach ($Item in $InfoCSV){
$BDate = $Item.BDate
$BDate = $BDate -replace "yyyy",$Date.Year
$parsedBDate = Get-Date $BDate -Format "dd.MM.yyyy"
if($parsedBDate -le $today){
$Name = $Item.Name
Write-Output "$BDate";}
}

输出:
10.01.2023
06.02.2023
03.04.2023
06.05.2023
09.05.2023
02.07.2023
03.07.2023
07.07.2023
09.07.2023
02.08.2023
06.08.2023
02.09.2023

最后3个日期是从哪里来的?

我将不胜感激地接受任何答案。此外,如果有人有更好的方法来存储日期或以任何其他方式改进我的脚本,我会很高兴。

谢谢
Luca

英文:

I have a problem with my powershell script. I import a csv with different dates and compare them with today.

I dont know why but I get 3 dates from the csv that are in the future.

比较2个日期并输出所有过去的日期 (PowerShell)

The script:

$InfoCSV = Import-Csv -Path "C:\Script\BDR\Info.csv" -Delimiter ";"
$Date = Get-Date
$today = (Get-Date -format dd.MM.yyyy)

foreach ($Item in $InfoCSV){
$BDate = $Item.BDate
$BDate = $BDate -replace "yyyy",$Date.Year
$parsedBDate = Get-Date $BDate -Format "dd.MM.yyyy"
if($parsedBDate -le $today){
$Name = $Item.Name
Write-Output "$BDate"}
}

Output:
10.01.2023
06.02.2023
03.04.2023
06.05.2023
09.05.2023
02.07.2023
03.07.2023
07.07.2023
09.07.2023
02.08.2023
06.08.2023
02.09.2023

Where do the last 3 dates come from?

I would appreciat any answer.
Furthermore I would be happy when anyone has a better Idea how to store the dates or improve my script in any other way.

Thanks
Luca

答案1

得分: 1

请看以下的翻译:

对于_按时间顺序_比较,按照[Olaf](https://stackoverflow.com/users/9196560/olaf)的建议,将您的日期_字符串_解析为`[datetime]`([`System.DateTime`](https://learn.microsoft.com/en-US/dotnet/api/System.DateTime))实例:

```powershell
# 获取今天的日期作为[datetime]实例。
$today = (Get-Date).Date

# ...

# 将CSV列值解析为[datetime]实例。
$parsedBDate =
  [datetime]::ParseExact($Item.BDate, 'dd.MM.yyyy', [cultureinfo]::InvariantCulture)

# 现在 $parsedBDate -le $today 可正常工作。

希望这对您有所帮助。如果您需要更多翻译,请告诉我。

<details>
<summary>英文:</summary>

For _chronological_ comparison, parse your date _strings_ into `[datetime]` ([`System.DateTime`](https://learn.microsoft.com/en-US/dotnet/api/System.DateTime)) instances, as [Olaf](https://stackoverflow.com/users/9196560/olaf) suggests:

Get today's date as a [datetime] instance.

$today = (Get-Date).Date

...

Parse the CSV column value into a [datetime] instance.

$parsedBDate =
[datetime]::ParseExact($Item.BDate, 'dd.MM."yyyy"', [cultureinfo]::InvariantCulture)

Now $parsedBDate -le $today works as intended.


</details>



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  • 本文由 发表于 2023年7月11日 13:54:50
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