If the folder exist, show the following message - powershell

Question

I have one question. I don't understand what I am doing wrong, I wrote the following script to tell me if the folder exists to show a message, but it is now showing it.
If (Test-Path -path ($LabServer + $CaseName) -PathType Container){
Add-Type -AssemblyName System.Windows.Forms
[System.Windows.Forms.MessageBox]::Show('Folder name exists, please enter a new name')
The script is supposed to create multiple folders in a specific location. I want to check if the folder name (Case Name) already exists, and if it does, do not create the folder with the same name, but the script continues and creates the folder and sub-folders.
Here is the full script.
Thank you for all your help
# Load required assemblies
[void] [System.Reflection.Assembly]::LoadWithPartialName("System.Windows.Forms")
# Drawing form and controls
$CreateFolder = New-Object System.Windows.Forms.Form
$CreateFolder.Text = "Create Multiple Custodian Folders"
$CreateFolder.Size = New-Object System.Drawing.Size(350,415)
$CreateFolder.FormBorderStyle = "FixedDialog"
$CreateFolder.TopMost = $true
$CreateFolder.MaximizeBox = $false
$CreateFolder.MinimizeBox = $false
$CreateFolder.ControlBox = $true
$CreateFolder.StartPosition = "CenterScreen"
$CreateFolder.Font = "Segoe UI"
#======================== CASE NAME ========================#
# adding a label to my form
$label_message = New-Object System.Windows.Forms.Label
$label_message.Location = New-Object System.Drawing.Size(20,8)
$label_message.Size = New-Object System.Drawing.Size(100,15)
$label_message.Text = "Case Name"
$CreateFolder.Controls.Add($label_message)
# CaseName
$CaseName = New-Object System.Windows.Forms.TextBox
$CaseName.Location = New-Object System.Drawing.Size(20,30)
$CaseName.Size = New-Object System.Drawing.Size(300,25)
$CaseName.ScrollBars = "Vertical"
$CreateFolder.Controls.Add($CaseName)
#======================== DROPBOX ========================#
$label_messageCombobox = New-Object System.Windows.Forms.Label
$label_messageCombobox.Location = New-Object System.Drawing.Size(20,60)
$label_messageCombobox.Size = New-Object System.Drawing.Size(100,15)
$label_messageCombobox.Text = "Pick a Server"
$CreateFolder.Controls.Add($label_messageCombobox)
$DropdownBox = New-Object System.Windows.Forms.ComboBox
$DropdownBox.Location = New-Object System.Drawing.Size(20,80)
$DropdownBox.Size = New-Object System.Drawing.Size(300,15)
$DropdownBox.Height = 200
$Dropdownbox.DropDownStyle = "DropDownList"
$CreateFolder.Controls.Add($DropdownBox)
$Servers = #("Lab Machine 40","Lab Machine 45","Lab Machine 50","Lab Machine 55")
foreach($Server in $Servers){
$DropdownBox.Items.Add($Server) | Out-Null
}
#======================== FUNCTION TO GET SERVER ========================#
Function Get-Server(){
$SelectedServer = $DropdownBox.SelectedItem.ToString()
if($SelectedServer -eq "Lab Machine 50") {
$Script:LabServer = Set-Location "\\Server50\K$" -PassThru
}
elseif($SelectedServer -eq "Lab Machine 55") {
$Script:LabServer = Set-Location "\\Server55\K$" -PassThru
}
elseif($SelectedServer -eq "Lab Machine 40") {
$Script:LabServer = Set-Location "\\Server40\K$" -PassThru
}
elseif($SelectedServer -eq "Lab Machine 45") {
$Script:LabServer = Set-Location "\\Server45\K$" -PassThru
}
}
#======================== INPUTBOX ========================#
$label_message2 = New-Object System.Windows.Forms.Label
$label_message2.Location = New-Object System.Drawing.Size(20,110)
$label_message2.Size = New-Object System.Drawing.Size(100,15)
$label_message2.Text = "Custodian Names"
$CreateFolder.Controls.Add($label_message2)
# Inputbox
$Inputbox = New-Object System.Windows.Forms.TextBox
$Inputbox.Multiline = $True;
$Inputbox.Location = New-Object System.Drawing.Size(20,130)
$Inputbox.Size = New-Object System.Drawing.Size(300,200)
$Inputbox.ScrollBars = "Vertical"
$CreateFolder.Controls.Add($Inputbox)
#======================== BUTTON ========================#
# add a button ti create folder
$button_ClickMe = New-Object System.Windows.Forms.Button
$button_ClickMe.Location = New-Object System.Drawing.Size(45,340)
$button_ClickMe.Size = New-Object System.Drawing.Size(240,32)
$button_ClickMe.TextAlign = "MiddleCenter"
$button_ClickMe.Text = "Create Folders"
$button_ClickMe.Add_Click({
#$FolderExist = $LabServer.Text + $CaseName.Text
If ($CaseName.TextLength -eq 0){
Add-Type -AssemblyName System.Windows.Forms
[System.Windows.Forms.MessageBox]::Show('Please Enter a Case Name')
}
else {
If (Test-Path -path ($LabServer + $CaseName) -PathType Container){
Add-Type -AssemblyName System.Windows.Forms
[System.Windows.Forms.MessageBox]::Show('Folder name exists, please enter a new name')
}
else {
if ($Inputbox.TextLength -eq 0){
Add-Type -AssemblyName System.Windows.Forms
[System.Windows.Forms.MessageBox]::Show('Please enter 1 custodian name')
}
else {
Get-Server
Set-Location $LabServer
New-Item $CaseName.Text -type directory
Start-Sleep -Seconds 5
Set-Location ($LabServer.Text + $CaseName.Text)
ForEach ($Folder in $Inputbox.lines) {
New-Item $Folder -type directory
}
Add-Type -AssemblyName System.Windows.Forms
[System.Windows.Forms.MessageBox]::Show('Folders were created')
[System.Windows.Forms.Application]::Exit()
}
}
}
})
$CreateFolder.Controls.Add($button_ClickMe)
# show form
$CreateFolder.Add_Shown({$CreateFolder.Activate()})
[void] $CreateFolder.ShowDialog()

Answer 1

You almost answered your own question here:
#$FolderExist = $LabServer.Text + $CaseName.Text
Check out the comments in the code:
If ($CaseName.TextLength -eq 0)
{
Add-Type -AssemblyName System.Windows.Forms
[System.Windows.Forms.MessageBox]::Show('Please Enter a Case Name')
}
else
{
# If we are here $LabServer is not defined because Get-Server did not run yet
# You can take 2 different approaches, either use your function or
# Test-Path using the ComboBox
# Approach 1: Define $LabServer
Get-Server
# Now you can Test-Path
$path = Join-Path $LabServer -ChildPath $CaseName.Text
If (Test-Path -Path $path -PathType Container)
{
.....
}
# Approach 2:
$path = Join-Path ("\\{0}\K$" -f $DropdownBox.SelectedItem) -ChildPath $CaseName.Text
If (Test-Path -Path $path -PathType Container)
{
.....
}
.....
Edit
I think it's worth adding a few recommendations to reduce the number of nested conditions you have on your AddClick listener.
First, by default at the start of your form, disable the button:
$button_ClickMe.Enabled = $false
Now you can add 2 listeners on TextChanged for both TextBox:
$textChangedEvent = {
if($caseName.TextLength -and $DropdownBox.SelectedItem -and $Inputbox.TextLength)
{
$button_ClickMe.Enabled = $true
}
else
{
$button_ClickMe.Enabled = $false
}
}
$CaseName.Add_TextChanged($textChangedEvent)
$Inputbox.Add_TextChanged($textChangedEvent)
With this you can remove the 2 conditions you have on $CaseName.TextLength -eq 0 and $Inputbox.TextLength -eq 0.
Lastly, your AddClick event would look like this (Note that you wouldn't need the Get-Server function):
$buttonClickEvent = {
$path = "\\{0}\K$" -f $DropdownBox.SelectedItem
$path = Join-Path $path -ChildPath $CaseName.Text
if(Test-Path $path -PathType Container)
{
[System.Windows.Forms.MessageBox]::Show('Folder name exists, please enter a new name')
return
}
New-Item $path -Type Directory
Start-Sleep -Seconds 5
foreach($folder in $Inputbox.Lines)
{
$folder = $Folder.Trim()
$newFolder = Join-Path $path -ChildPath $folder
New-Item $newFolder -Type Directory
[System.Windows.Forms.MessageBox]::Show('Folders were created')
[System.Windows.Forms.Application]::Exit()
}
}
$button_ClickMe.Add_Click($buttonClickEvent)