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我正在编写重命名报告并将它们放入文件夹的脚本。按文件名重命名报告
报告名称必须更改为正确的日期（日期必须在文件名中）。
例如我有一个名为“Report_2015_02”的报告/我必须从文件名减去一个月 - 而不是系统时间。
在这种情况下，新的报告名称必须是“Report_2015_01”
但在我使用SYSTEMTIME的瞬间，所以REPORTNAME将是“Report_2017_02”因为SYSTEMTIME（2017_03）减去一个月的2017_02。 ..
问：如何使用文件名的日期而不是系统时间？
这里是我的代码：
#today's date (year-month-day)
$todaydate = Get-Date -Format yyyy-MM-dd
#arrays (today => systemtime)
$todaydate = $todaydate.Split('-')
$todaydate[0] #year
$todaydate[1] #month
$todaydate[2] #day
#arrays yesterday (systemtime - one day)
$yesterdaysdate = Get-Date((Get-Date).AddDays(-1)) -Format yyyy-MM-dd
$yesterdaysdate = $yesterdaysdate.Split('-')
$yesterdaysdate[0] #year
$yesterdaysdate[1] #month
$yesterdaysdate[2] #day
#arrays yesterday (systemtime - one day)
$lastmonth = Get-Date((Get-Date).AddMonths(-1)) -Format yyyy-MM-dd
$lastmonth = $lastmonth.Split('-')
$lastmonth[0] #year
$lastmonth[1] #month
$lastmonth[2] #day
#Example 1: Filename "Report_Telephone_yyyy-mm" => in this case "Report_Telephone_2016-12"
#it renames the file -> minus one month, so the name must be "Report_Telephone_2016-11"
$filename='Report_Telephone_'+ $lastmonth[0]+'-'+ $lastmonth[1] + '.xlsx'
write-host $filename
rename-item 'c:\Reporting\Report_Telephone_' + $todaydate[0] +'-' + $todaydate[1] + '.xlsx' -NewName $filename
$sourcepath='C:\Reporting\'+ $filename
write-host $sourcepath
$destinationpath='C:\Reporting\'+ $lastmonth[0]+'\'+ $lastmonth[1]
write-host $destinationpath
if(test-path $destinationpath)
{
}
else
{
mkdir $destinationpath
}
move-item -path $sourcepath -destination $destinationpath
#Example 2: Filename "Report_Outlook_yyyy-mm-dd" => in this case "Report_Outlook_2016-12-14"
#it renames the file -> minus one day, so the name must be "Report_Outlook_2016-12-13"
$filename='Report_Outlook_'+ $lastmonth[0]+'-'+ $lastmonth[1] + '.xlsx'
write-host $filename
rename-item 'c:\Reporting\Report_Outlook_' + $todaydate[0] +'-' + $todaydate[1] + '.xlsx' -NewName $filename
$sourcepath='C:\Reporting\'+ $filename
write-host $sourcepath
$destinationpath='C:\Reporting\'+ $yesterdaysdate[0]+'\'+ $yesterdaysdate[1]
write-host $destinationpath
if(test-path $destinationpath)
{
}
else
{
mkdir $destinationpath
}
move-item -path $sourcepath -destination $destinationpath
#that is just for generating log-files
[System.IO.File]::WriteAllText("$sourcepath\Protokoll_$todaydate.xls", $output)