运算符“-gt"在此 PowerShell 中不起作用

问题描述

我有一个 PowerShell 脚本，它可以根据我的要求读取 CSV 文件并过滤掉数据，但问题是它只能在我的 Windows 8.1 系统上运行，而不能在其他任何地方运行.-gt 运算符，准确地说，如果我将 -gt 更改为 lt, le等

I have a PowerShell script which reads a CSV file and filters out data as per my requirement, but the catch is that it ONLY works on my Windows 8.1 system and nowhere else. The -gt operator to be precise, the script runs on other systems if I change the -gt to lt, le, etc.

下面是脚本.

$date1 = Date ("{0:MM/dd/yyyy}" -f (get-date).AddDays(-1)) -format G

echo $date1

Import-Csv C:\avaya\2014.04.csv | Where-Object { $_.Party1Name -eq "User_Name" -and $_.'Call Start' -gt ( $date1 ) } | Export-Csv -Path "result.csv" -NoTypeInformation

推荐答案

-gt 正常工作.问题是您试图将字符串值与 -gt 进行比较.要比较日期，它们需要是 DateTime-objects.导入 CSV 文件时，所有值都将作为字符串导入.您需要将日期转换回 DateTime 对象.例如:

-gt is working as it should. The problem is that you're trying to compare string-values with -gt. To compare dates, they need to be DateTime-objects. When you import a CSV file, all values are imported as strings. You need to convert the date back to a DateTime-object. Ex:

$date1=(get-date).AddDays(-1)

echo $date1

Import-Csv C:\avaya\2014.04.csv | Where-Object { $_.Party1Name -eq "User_Name" -and ($_.'Call Start' -as [datetime]) -gt $date1 } | Export-Csv -Path "result.csv" -NoTypeInformation

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