Mar 10 2023 06:37 AM
I'm still a novice in PowerShell, but I have continuing problems to solve.
I have automatically created file names of this form:
event-20220630T1420405650000.pqd
Where event- is constant, the next 8 characters represent yyyymmdd, T is a constant, and the remaining 13 characters represent an incrementing time, possibly in seconds since some starting date.
My challenge is to compare the yyyymmdd in the file name to the yyyymmdd in the file creation date and determine if the date in the file name is in the future when compared to the creation date.
Any assistance will be greatly appreciated!
Thanks,
Fred
Mar 10 2023 06:46 AM
Mar 10 2023 01:16 PM
Mar 13 2023 12:42 AM
Based on your code, it seems that you're retrieving the creation date of the parent folder instead of the creation date of the file. To get the creation date of the file, you need to use the CreationTime property of the file object, which you already have stored in the $recentFile variable. Here's the modified code that retrieves the creation date of the file and compares it with the date in the file name:
$dirs = Get-ChildItem "\\fileshare\level1\level2\level3\parentdirectory" -Directory
$csvLog = "\\fileshare\toplevel\myprofile\myfolders\Documents\PowerShellOutput\Ion Future Events.csv"
foreach ($dir in $dirs) {
$recentFile = $null
$folder = $dir.Name
$directory = $dir.FullName
echo "Directory" $directory
$filesCount = (Get-ChildItem $directory -Filter "event*.pqd" -Recurse).Count
$recentFile = Get-ChildItem $directory -Filter "event*.pqd" -Recurse | Sort-Object LastWriteTime -Descending| Select-Object -First 1
$recentFileName = $recentFile.Name
$recentFileLength = $recentFile.Length
$recentFileWriteTime = $recentFile.LastWriteTime
if ($recentFile) {
$date_str = $recentFileName.Substring(6, 8)
echo "Date_str" $date_str
$date_obj = [datetime]::ParseExact($date_str, "yyyyMMdd", $null)
echo "Date Obj" $date_obj
$creation_date = $recentFile.CreationTime.Date
echo "Creation Date" $creation_date
if ($date_obj -gt $creation_date) {
Write-Output "Date in file name is in the future."
} else {
Write-Output "Date in file name is not in the future."
}
$object = New-Object -TypeName psobject
$object | Add-Member -MemberType NoteProperty -Name "Site" -Value $folder
$object | Add-Member -MemberType NoteProperty -Name "File Name" -Value $recentFileName
$object | Add-Member -MemberType NoteProperty -Name "File Size" -Value $recentFileLength
$object | Add-Member -MemberType NoteProperty -Name "Date Time" -Value $recentFileWriteTime
$object | Add-Member -MemberType NoteProperty -Name "File Count" -Value $filesCount
$object | Export-Csv $csvLog -Encoding ASCII -Append -NoTypeInformation
}
}
With this modification, the code should now compare the date in the file name with the creation date of the file
Mar 13 2023 08:17 AM
Yes. Now the comparison is correct.
The only remaining issue is that I need to do the date comparison for every event*.pqd file, not just the most recent one in each folder. I'm not sure how to move the comparison to the right location in the code to get that result.
Mar 13 2023 08:41 AM
To compare the date for every event*.pqd file in each folder, you can modify the existing foreach loop to loop through all the files instead of just the most recent file in each folder. Here's an updated version of the code with the necessary changes:
$dirs = Get-ChildItem "\\fileshare\level1\level2\level3\parentdirectory" -Directory
$csvLog = "\\fileshare\toplevel\myprofile\myfolders\Documents\PowerShellOutput\Ion Future Events.csv"
foreach ($dir in $dirs) {
$folder = $dir.Name
$directory = $dir.FullName
echo "Directory" $directory
$files = Get-ChildItem $directory -Filter "event*.pqd" -Recurse
$filesCount = $files.Count
foreach ($file in $files) {
$date_str = $file.Name.Substring(6, 8)
echo "Date_str" $date_str
$date_obj = [datetime]::ParseExact($date_str, "yyyyMMdd", $null)
echo "Date Obj" $date_obj
$creation_date = $file.CreationTime.Date
echo "Creation Date" $creation_date
if ($date_obj -gt $creation_date) {
Write-Output "File $($file.Name) in folder $folder has date in the future."
} else {
$object = New-Object -TypeName psobject
$object | Add-Member -MemberType NoteProperty -Name "Site" -Value $folder
$object | Add-Member -MemberType NoteProperty -Name "File Name" -Value $file.Name
$object | Add-Member -MemberType NoteProperty -Name "File Size" -Value $file.Length
$object | Add-Member -MemberType NoteProperty -Name "Date Time" -Value $file.LastWriteTime
$object | Add-Member -MemberType NoteProperty -Name "File Count" -Value $filesCount
$object | Export-Csv $csvLog -Encoding ASCII -Append -NoTypeInformation
}
}
}
This code uses a nested foreach loop to loop through all the event*.pqd files in each folder. For each file, it extracts the date from the file name, converts it to a datetime object, and compares it to the file creation date. If the date in the file name is in the future, it writes a message to the console. Otherwise, it creates a new psobject with the relevant file information and exports it to the CSV file. the Export-Csv cmdlet is inside the inner loop, so it exports data for each file separately.
Mar 13 2023 01:49 PM
Mar 16 2023 02:35 AM
Here's a version with a little bit of flexibility insofar as:
It's also more efficient over larger file repositories as it's not storing the file system structure in a local variable prior to doing the work.
I went with using the full path to the file in the output but you can change that to your liking.
$LogFile = ".\SomeLogFile.log";
$Root = "D:\Data";
$FilenameTimestamp = [datetime]::MinValue;
Remove-Item -Path $LogFile -ErrorAction:SilentlyContinue;
Get-ChildItem -Directory -Path $Root |
ForEach-Object {
$Directory = $_;
Get-ChildItem -File -Recurse -Path ($_.FullName) -Filter "event-*.pqd" |
ForEach-Object {
if ((($NameParts = $_.Name.Split(@("-", "."))).Count -eq 3) -and ([datetime]::TryParseExact($NameParts[1].Substring(0, 8), "yyyyMMdd", $null, [System.Globalization.DateTimeStyles]::None, [ref] $FilenameTimestamp)) -and ($FilenameTimestamp.Date -gt $_.CreationTime.Date))
{
[PSCustomObject] @{
Site = $Directory.Name;
Path = $_.FullName;
}
}
}
} | Export-Csv -Path $LogFile -NoTypeInformation;
Sample output from the log file:
"Site","Path"
"Temp","D:\Data\Temp\event-20230630T1420405650000.pqd"
Cheers,
Lain