find and replace wildcard

PowerShell Help
1

edit: how do I display the two arrow characters on the comma and period keys in this forum? it’s getting edited out as ‘code’

i’m trying to edit content in a scheduled task. the task xml contains this line

2018-06-29T23:59:00

i’m trying to replace the “2018-06-29T” part, but the ‘2018-06-29’ part could be anything, so I need a wildcard.

$content = (Get-Content $task)
$newcontent= $content -Replace “*T”,$new
$newcontent

$newcontent is still $content, so I don’t think it’s finding the text to replace, possibly because of the arrow characters in the text, possibly because of the wildcard. help?

2

How familiar are you with the concept of regular expressions in general and in Powershell in particular? It is used when you use comparison operators like -match and -replace.
That would lead to a command like this:

$newcontent= $content -Replace “.*T”,$new
to “fix” your code.
On the other hand I’m pretty sure there are probably better ways to manipulate a scheduled task than using string acrobatics. :wink: You might show some more of your code. We might help you with this.

3

testing:

2018-06-30T
4

so the text I need to replace, and the text I need to use to replace it, both contain characters that I can’t display in this forum because the forum thinks it’s code. and I can’t upload a screenshot. it’s the left and right arrow characters above the comma and period on the keyboard.

5

the text I need to replace: “(‘less than’ symbol)StartBoundary(‘greater than’ symbol)2018-06-18T”

6

I went the XML route, and it replaces the text I want, but apparently that doesn’t actually affect the scheduled task anyway. i’m trying to change the Date in “startboundary” without changing the time.

 $Date = (get-date -Format o).split('T')[0]
 $xml = [xml](Get-Content $task)
 $current = $xml.task.Triggers.TimeTrigger.StartBoundary
 $currenttime = $current.split("T")[1]
 $new = $date + "T" + $currenttime
 $xml.task.triggers.timetrigger.StartBoundary = $new
 $xml.Save($task.FullName)

that code successfully modifies the XML of the task just like I want, but the trigger remains unchanged in the task scheduler GUI.