How to do looping for checking an existing folder with PowerShell? - powershell

Question

I want to decide which folder that I need to choose based on my data, then if I can't find it, it will show the GUI for waiting and do looping to check it. I try this code, I can find the folder, but when I can't find it once I want to show the GUI it returns some error.
This is how I checking the folder
function FIND {
Write-Host "call the function that can call the GUI.ps1 script"
$Path = "D:\Process"
Write-Host "Starting Mapping SSID and Finding Job"
$SSID_Unit = "111dddddfafafesa"
Try{
$Path_Job = (Get-Item (Get-ChildItem "$Path\*\SSID_LST" | Select-String -Pattern "$SSID_Unit").Path).Directory.FullName
$global:Result = [PSCustomObject]#{
Exists = $true
FileName = $Path_Job.FullName
Attempts = 1
}
Write-Host "Job'$($global:Result.FileName)' Exists. Found after $($global:Result.Attempts) attempts." -ForegroundColor Green
Write-Host "Continue to Assigned Job"
Pause
} Catch {
Write-Host "Waiting for the jobss"
& D:\X\Wait_GUI.ps1 -Path $Path_Job -MaxAttempts 20
Write-Host "Job not found after $($global:Result.Attempts) attempts." -ForegroundColor Red
}
}
FIND
This is the GUI
Param (
[string]$Path = '*.*',
[string]$MaxAttempts = 5
)
Add-Type -AssemblyName System.Windows.Forms
[System.Windows.Forms.Application]::EnableVisualStyles()
# set things up for the timer
$script:nAttempts = 0
$timer = New-Object System.Windows.Forms.Timer
$timer.Interval = 1000 # 1 second
$timer.Add_Tick({
$global:Result = $null
$script:nAttempts++
$Path_Job = Get-Item -Path $Path
if ($Path_Job) {
$global:Result = [PSCustomObject]#{
Exists = $true
FileName = $Path_Job.FullName
Attempts = $script:nAttempts
}
$timer.Dispose()
$Form.Close()
}
elseif ($script:nAttempts -ge $MaxAttempts) {
$global:Result = [PSCustomObject]#{
Exists = $false
FileName = ''
Attempts = $script:nAttempts
}
$timer.Dispose()
$Form.Close()
}
})
Add-Type -AssemblyName System.Windows.Forms
[System.Windows.Forms.Application]::EnableVisualStyles()
$Form = New-Object system.Windows.Forms.Form
$Form.ClientSize = '617,418'
$Form.text = "AutoGM"
$Form.BackColor = "#8b572a"
$Form.TopMost = $false
$Form.WindowState = 'Maximized'
$Label1 = New-Object system.Windows.Forms.Label
$Label1.text = "UNDER AUTOMATION PROCESS"
$Label1.AutoSize = $true
$Label1.width = 25
$Label1.height = 10
$Label1.Anchor = 'top,right,bottom,left'
$Label1.ForeColor = "#ffffff"
$Label1.Anchor = "None"
$Label1.TextAlign = "MiddleCenter"
$Label2 = New-Object system.Windows.Forms.Label
$Label2.text = "Waiting for the job..."
$Label2.AutoSize = $true
$Label2.width = 25
$Label2.height = 10
$Label2.ForeColor = "#ffffff"
$Label2.Anchor = "None"
$Label2.TextAlign = "MiddleCenter"
$Form.controls.AddRange(#($Label1,$Label2))
[void]$Form.Show()
# Write-Host $Form.Height
# Write-Host $Form.Width
$Label1.location = New-Object System.Drawing.Point(($Form.Width*0.35), ($Form.Height*0.4))
$Label2.location = New-Object System.Drawing.Point(($form.Width*0.43), ($Form.Height*0.5))
$L_S = (($Form.Width/2) - ($Form.Height / 2)) / 15
$Label1.Font = "Microsoft Sans Serif, $L_S, style=Bold"
$Label2.Font = "Microsoft Sans Serif, $L_S, style=Bold"
$Form.controls.AddRange(#($Label1,$Label2))
# start the timer as soon as the dialog is visible
$Form.Add_Shown({ $timer.Start() })
$Form.Visible = $false
[void]$Form.ShowDialog()
# clean up when done
$Form.Dispose()
if not found, it return this
Waiting for the jobss
Job not found after 1 attempts.
and the GUI is not shown

Answer 1

Ok, first of all, you are using different tests for the file and/or directory in the code and in the GUI. Furthermore, you call the GUI.ps1 file with a path set to a $null value.
I would change your code to something like this:
$Path = "D:\Process\*\SSID_LST\*" # the path to look for files
$SSID_Unit = "111dddddfafafesa" # the Search pattern to look for inside the files
function Test-FileWithGui {
[CmdletBinding()]
param(
[Parameter(Mandatory = $true, Position = 0)]
[string]$Path,
[Parameter(Mandatory = $true, Position = 2)]
[string]$Pattern,
[int]$MaxAttempts = 5
)
Write-Host "Starting Mapping SSID and Finding Job"
# set up an 'empty' $global:Result object to return on failure
$global:Result = '' | Select-Object #{Name = 'Exists'; Expression = {$false}}, FileName, Directory, #{Name = 'Attempts'; Expression = {1}}
# test if the given path is valid. If not, exit the function
if (!(Test-Path -Path $Path -PathType Container)) {
Write-Warning "Path '$Path' does not exist."
return
}
# try and find the first file that contains your search pattern
$file = Select-String -Path $Path -Pattern $Pattern -SimpleMatch -ErrorAction SilentlyContinue | Select-Object -First 1
if ($file) {
$file = Get-Item -Path $file.Path
$global:Result = [PSCustomObject]#{
Exists = $true
FileName = $file.FullName
Directory = $file.DirectoryName
Attempts = 1
}
}
else {
& "D:\GUI.ps1" -Path $Path -Pattern $Pattern -MaxAttempts $MaxAttempts
}
}
# call the function that can call the GUI.ps1 script
Test-FileWithGui -Path $Path -Pattern $SSID_Unit -MaxAttempts 20
# show the $global:Result object with all properties
$global:Result | Format-List
# check the Global result object
if ($global:Result.Exists) {
Write-Host "File '$($global:Result.FileName)' Exists. Found after $($global:Result.Attempts) attempts." -ForegroundColor Green
}
else {
Write-Host "File not found after $($global:Result.Attempts) attempts." -ForegroundColor Red
}
Next the GUI file.
As you are now searching for a file that contains some text, you need a third parameter to call this named Pattern.
Inside the GUI file we perform the exact same test as we did in the code above, using the parameter $Pattern as search string:
Param (
[string]$Path,
[string]$Pattern,
[int]$MaxAttempts = 5
)
Add-Type -AssemblyName System.Windows.Forms
[System.Windows.Forms.Application]::EnableVisualStyles()
# set things up for the timer
$script:nAttempts = 0
$timer = New-Object System.Windows.Forms.Timer
$timer.Interval = 1000 # 1 second
$timer.Add_Tick({
$global:Result = $null
$script:nAttempts++
# use the same test as you did outside of the GUI
# try and find the first file that contains your search pattern
$file = Select-String -Path $Path -Pattern $Pattern -SimpleMatch -ErrorAction SilentlyContinue | Select-Object -First 1
if ($file) {
$file = Get-Item -Path $file.Path
$global:Result = [PSCustomObject]#{
Exists = $true
FileName = $file.FullName
Directory = $file.DirectoryName
Attempts = $script:nAttempts
}
$timer.Dispose()
$Form.Close()
}
elseif ($script:nAttempts -ge $MaxAttempts) {
$global:Result = [PSCustomObject]#{
Exists = $false
FileName = $null
Directory = $null
Attempts = $script:nAttempts
}
$script:nAttempts = 0
$timer.Dispose()
$Form.Close()
}
})
$Form = New-Object system.Windows.Forms.Form
$Form.ClientSize = '617,418'
$Form.Text = "AutoGM"
$Form.BackColor = "#8b572a"
$Form.TopMost = $true
$Form.WindowState = 'Maximized'
# I have removed $Label2 because it is easier to use
# just one label here and Dock it to Fill.
$Label1 = New-Object system.Windows.Forms.Label
$Label1.Text = "UNDER AUTOMATION PROCESS`r`n`r`nWaiting for the job..."
$Label1.AutoSize = $false
$Label1.Dock = 'Fill'
$Label1.TextAlign = "MiddleCenter"
$Label1.ForeColor = "#ffffff"
$L_S = (($Form.Width/2) - ($Form.Height / 2)) / 10
$Label1.Font = "Microsoft Sans Serif, $L_S, style=Bold"
$Form.controls.Add($Label1)
# start the timer as soon as the dialog is visible
$Form.Add_Shown({ $timer.Start() })
[void]$Form.ShowDialog()
# clean up when done
$Form.Dispose()
The results during testing came out like below
If the file was found within the set MaxAttempts tries:
Starting Mapping SSID and Finding Job
Exists : True
FileName : D:\Process\test\SSID_LST\blah.txt
Directory : D:\Process\test\SSID_LST
Attempts : 7
File 'D:\Process\test\SSID_LST\blah.txt' Exists. Found after 7 attempts.
When the file was NOT found:
Starting Mapping SSID and Finding Job
Exists : False
FileName :
Directory :
Attempts : 20
File not found after 20 attempts.
If even the folder $Path was not found, the output is
Starting Mapping SSID and Finding Job
WARNING: Path 'D:\Process\*\SSID_LST\*' does not exist.
Exists : False
FileName :
Directory :
Attempts : 1
File not found after 1 attempts.
Hope that helps