Powershell Unique Selections for Multiple Combo Boxes

Question

I am currently working on a powershell script that will use 4 combo box controls. I would like for them to all use the same data source whether it be an array or just a .txt file. I would like for each selection to be unique so that no 2 combo boxes can
have the same item selected. Is there a way to hide the item selected in the data source so the other combo boxes do not even have the option to select it and then when the user changes the item in one of the combo boxes the item is available again? 

Answer 1

What I am looking do do is have a list of values (T1111,T1112,T1113,T1114) to be selected from by 4 combo boxes. Each value can only be selected once so if one combo box picks T1111 the other 3 do not have that option in its selection. So far I reload the
combo boxes ever time a selection is made and remove the option from the array, but I was looking to see if there is a better way. As it currently stands, getting distinct values isn't working.
Code snippet to remove item from array:
function Get-DataSource
$array = @("T1111", "T1112", "T1113", "T1114")
$combo1 = $combobox1.SelectedItem.ToString()
$combo2 = $combobox2.SelectedItem.ToString()
$array = $array | Where-Object -FilterScript { $_ -ne $combo1 }
$array = $array | Where-Object -FilterScript { $_ -ne $combo2 }
return $array
I apologize for not uploading my code.
function OnApplicationLoad {
#Note: This function is not called in Projects
#Note: This function runs before the form is created
#Note: To get the script directory in the Packager use: Split-Path $hostinvocation.MyCommand.path
#Note: To get the console output in the Packager (Windows Mode) use: $ConsoleOutput (Type: System.Collections.ArrayList)
#Important: Form controls cannot be accessed in this function
#TODO: Add modules and custom code to validate the application load
return $true #return true for success or false for failure
function OnApplicationExit {
#Note: This function is not called in Projects
#Note: This function runs after the form is closed
#TODO: Add custom code to clean up and unload modules when the application exits
$script:ExitCode = 0 #Set the exit code for the Packager
#endregion Application Functions;2
# Generated Form Function
function Call-tenet_psf {
#region Import the Assemblies
[void][reflection.assembly]::Load('mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089')
[void][reflection.assembly]::Load('System, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089')
[void][reflection.assembly]::Load('System.Windows.Forms, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089')
[void][reflection.assembly]::Load('System.Data, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089')
[void][reflection.assembly]::Load('System.Drawing, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a')
[void][reflection.assembly]::Load('System.Xml, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089')
[void][reflection.assembly]::Load('System.DirectoryServices, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a')
[void][reflection.assembly]::Load('System.Core, Version=3.5.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089')
[void][reflection.assembly]::Load('System.ServiceProcess, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a')
#endregion Import Assemblies
#region Generated Form Objects
[System.Windows.Forms.Application]::EnableVisualStyles()
$form1 = New-Object 'System.Windows.Forms.Form'
$combobox2 = New-Object 'System.Windows.Forms.ComboBox'
$combobox1 = New-Object 'System.Windows.Forms.ComboBox'
$buttonOK = New-Object 'System.Windows.Forms.Button'
$InitialFormWindowState = New-Object 'System.Windows.Forms.FormWindowState'
#endregion Generated Form Objects
# User Generated Script
function OnApplicationLoad {
#Note: This function is not called in Projects
#Note: This function runs before the form is created
#Note: To get the script directory in the Packager use: Split-Path $hostinvocation.MyCommand.path
#Note: To get the console output in the Packager (Windows Mode) use: $ConsoleOutput (Type: System.Collections.ArrayList)
#Important: Form controls cannot be accessed in this function
#TODO: Add modules and custom code to validate the application load
return $true #return true for success or false for failure
function OnApplicationExit {
#Note: This function is not called in Projects
#Note: This function runs after the form is closed
#TODO: Add custom code to clean up and unload modules when the application exits
$script:ExitCode = 0 #Set the exit code for the Packager
$FormEvent_Load={
#TODO: Initialize Form Controls here
Load-ComboBox $combobox1 (Get-DataSource)
Load-ComboBox $combobox2 (Get-DataSource)
function Get-DataSource
$array = @("T1111", "T1112", "T1113", "T1114")
$combo1 = $combobox1.SelectedItem.ToString()
$combo2 = $combobox2.SelectedItem.ToString()
$array = $array | Where-Object -FilterScript { $_ -ne $combo1 }
$array = $array | Where-Object -FilterScript { $_ -ne $combo2 }
return $array
#region Control Helper Functions
function Load-ComboBox
<#
.SYNOPSIS
This functions helps you load items into a ComboBox.
.DESCRIPTION
Use this function to dynamically load items into the ComboBox control.
.PARAMETER  ComboBox
The ComboBox control you want to add items to.
.PARAMETER  Items
The object or objects you wish to load into the ComboBox's Items collection.
.PARAMETER  DisplayMember
Indicates the property to display for the items in this control.
.PARAMETER  Append
Adds the item(s) to the ComboBox without clearing the Items collection.
.EXAMPLE
Load-ComboBox $combobox1 "Red", "White", "Blue"
.EXAMPLE
Load-ComboBox $combobox1 "Red" -Append
Load-ComboBox $combobox1 "White" -Append
Load-ComboBox $combobox1 "Blue" -Append
.EXAMPLE
Load-ComboBox $combobox1 (Get-Process) "ProcessName"
#>
Param (
[ValidateNotNull()]
[Parameter(Mandatory=$true)]
[System.Windows.Forms.ComboBox]$ComboBox,
[ValidateNotNull()]
[Parameter(Mandatory=$true)]
$Items,
   [Parameter(Mandatory=$false)]
[string]$DisplayMember,
[switch]$Append
if(-not $Append)
$ComboBox.Items.Clear()
if($Items -is [Object[]])
$ComboBox.Items.AddRange($Items)
elseif ($Items -is [Array])
$ComboBox.BeginUpdate()
foreach($obj in $Items)
$ComboBox.Items.Add($obj)
$ComboBox.EndUpdate()
else
$ComboBox.Items.Add($Items)
$ComboBox.DisplayMember = $DisplayMember
$combobox1_SelectedIndexChanged={
#TODO: Place custom script here
Load-ComboBox $combobox2 -Items (Get-DataSource)
$combobox2_SelectedIndexChanged={
#TODO: Place custom script here
Load-ComboBox $combobox1 -Items (Get-DataSource)
# --End User Generated Script--
#region Generated Events
$Form_StateCorrection_Load=
#Correct the initial state of the form to prevent the .Net maximized form issue
$form1.WindowState = $InitialFormWindowState
$Form_Cleanup_FormClosed=
#Remove all event handlers from the controls
try
$combobox2.remove_SelectedIndexChanged($combobox2_SelectedIndexChanged)
$combobox1.remove_SelectedIndexChanged($combobox1_SelectedIndexChanged)
$form1.remove_Load($FormEvent_Load)
$form1.remove_Load($Form_StateCorrection_Load)
$form1.remove_FormClosed($Form_Cleanup_FormClosed)
catch [Exception]
#endregion Generated Events
#region Generated Form Code
$form1.SuspendLayout()
# form1
$form1.Controls.Add($combobox2)
$form1.Controls.Add($combobox1)
$form1.Controls.Add($buttonOK)
$form1.AcceptButton = $buttonOK
$form1.ClientSize = '614, 289'
$form1.FormBorderStyle = 'FixedDialog'
$form1.MaximizeBox = $False
$form1.MinimizeBox = $False
$form1.Name = "form1"
$form1.StartPosition = 'CenterScreen'
$form1.Text = "Form"
$form1.add_Load($FormEvent_Load)
# combobox2
$combobox2.FormattingEnabled = $True
$combobox2.Location = '123, 92'
$combobox2.Name = "combobox2"
$combobox2.Size = '121, 21'
$combobox2.TabIndex = 2
$combobox2.add_SelectedIndexChanged($combobox2_SelectedIndexChanged)
# combobox1
$combobox1.FormattingEnabled = $True
$combobox1.Location = '123, 64'
$combobox1.Name = "combobox1"
$combobox1.Size = '121, 21'
$combobox1.TabIndex = 1
$combobox1.add_SelectedIndexChanged($combobox1_SelectedIndexChanged)
# buttonOK
$buttonOK.Anchor = 'Bottom, Right'
$buttonOK.DialogResult = 'OK'
$buttonOK.Location = '140, 254'
$buttonOK.Name = "buttonOK"
$buttonOK.Size = '75, 23'
$buttonOK.TabIndex = 0
$buttonOK.Text = "&OK"
$buttonOK.UseVisualStyleBackColor = $True
$form1.ResumeLayout()
#endregion Generated Form Code
#Save the initial state of the form
$InitialFormWindowState = $form1.WindowState
#Init the OnLoad event to correct the initial state of the form
$form1.add_Load($Form_StateCorrection_Load)
#Clean up the control events
$form1.add_FormClosed($Form_Cleanup_FormClosed)
#Show the Form
return $form1.ShowDialog()
} #End Function
#Call OnApplicationLoad to initialize
if((OnApplicationLoad) -eq $true)
#Call the form
Call-tenet_psf | Out-Null
#Perform cleanup
OnApplicationExit