Powershell checkbox, put checked items on top - powershell

Question

Searched all over the web for a seemingly simple issue:
I have a working script involving a Checkedlistbox:
New-Object System.Windows.Forms.CheckedListBox
I am trying to get it to behave so that all the checked items are put on top like this:
[x]
[x]
[x]
[ ]
[ ]
Now it looks like this:
[ ]
[ ]
[X]
[ ]
[X]
Getting the checklist items to sort alphabetically is easy, but i want them to sort on "selected state"
Is this even possible?
UPDATE -> the code:
$clbGroups = New-Object System.Windows.Forms.CheckedListBox
$UserGroups = $clbGroups.CheckedItems
$formMain.Controls.Add($clbGroups)
$clbGroups.Location = '305, 258'
$clbGroups.Name = "clbGroups"
$clbGroups.Size = '400, 150'
$clbGroups.CheckedItems
$clbGroups.TabIndex = 37
$clbGroups.Sorted = "True"
Write-Verbose "Adding groups to checked list box"
$XML.Options.SecurityGroups.SecurityGroup | %{[Void]$clbGroups.Items.Add($_)}
$cboGroup_SelectedIndexChanged={
Write-Verbose "Updating groups fields with list information"
$Group = #($XML.Options.Groups.Group | ? {$_.Name -match $cboGroup.Text})
$arrayGroups = #($Group | % { $_.List } | ? { $_.Type -match "SecurityGroup" } | % { $_.'#text' } )
for ($i = 0; $i -lt $clbGroups.Items.Count; $i++) { if($arrayGroups -Contains $clbGroups.Items[$i]){ $clbGroups.SetItemChecked( $i, $true ) } else { $clbGroups.SetItemChecked( $i, $false ) } }
}

Answer 1

So, here is a script that will work with CheckedListBox with only CheckedItems property. As there is no builtin sort method, the trick here is to create a custom function that will do it. That is done by function SortItems below. The function will prepare new items (checked and unchecked), clear existing, and add new ones in proper order. Additionally, it must programmatically preserve the checked state of items.
# Simplified form setup
$formMain = New-Object System.Windows.Forms.Form
$clbGroups = New-Object System.Windows.Forms.CheckedListBox
$UserGroups = $clbGroups.CheckedItems
$formMain.Controls.Add($clbGroups)
1..10 | % {[void]$clbGroups.Items.Add("Group '$_'")}
# Function doing actual sort
function SortItems {
$CheckedItems = $clbGroups.CheckedItems | % {$_}
$UncheckedItems = $clbGroups.Items | where {$_ -notin $CheckedItems}
$clbGroups.Items.Clear()
$CheckedItems | % {$clbGroups.Items.Add($_)} | % {$clbGroups.SetItemChecked($_,$true)}
$UncheckedItems | % {$clbGroups.Items.Add($_)}
}
# Add button that will trigger the sort
$sortBtn = New-Object System.Windows.Forms.Button
$sortBtn.Add_Click({SortItems})
$sortBtn.Location = '15, 158'
$sortBtn.Text = 'Sort it!'
$formMain.Controls.Add($sortBtn)
# Show main form as dialog window
$formMain.ShowDialog()
And two comments about code
$CheckedItems = $clbGroups.CheckedItems | % {$_} Second pipeline
element is required to create a copy of items, not just reference. If
we use just reference, variable will point to empty array after
clearing items.
$CheckedItems | % {$clbGroups.Items.Add($_)} | %
{$clbGroups.SetItemChecked($_,$true)} Second pipeline element is
adding items. It is returning index of newly created item. We use
that index in third pipeline element to set its checked state to true

Answer 2

EDIT: Based on additional user input, this is not a suitable solution. I will post a better one.
I am not quite sure about your setup, but you might use something like this.
First, I simulate creating new CheckedListBox with 5 CheckBoxes
$CL = New-Object System.Windows.Forms.CheckedListBox
1..5 | % {$CB = New-Object System.Windows.Forms.CheckBox; $CB.Text = "CheckBox $_"; $CL.Items.Add($CB)}
$CL.Items | Select Text, Checked
Then, lets make third and fifth item checked
$CL.Items[2].Checked = $true
$CL.Items[4].Checked = $true
$CL.Items | Select Text, Checked
And then, lets sort it and print it to screen
$CL.Items | Sort Checked | Select Text, Checked