Powershell - get ad user information based on a dropdown.text value - powershell

Question

I folks,
I've try my best to handle a LDAP query on a button click, but I can get the dropdown2.text to search a name instead I put the complet name like "smith, peter".
What I want is, if I put any of first name or Last name in the "Manager" field, the click button will searh and return me all the corresponding value in Active Directory event if it's a name or a family name. I'm not far, but I can't find where is my mistake
function GenerateForm {
set-Location c:\
add-PSSnapin quest.activeroles.admanagement
[reflection.assembly]::loadwithpartialname("System.Windows.Forms") | Out-Null
[reflection.assembly]::loadwithpartialname("System.Drawing") | Out-Null
$form1 = New-Object System.Windows.Forms.Form
$searchldap = New-Object System.Windows.Forms.Button
$DropDownLabel = new-object System.Windows.Forms.Label
$DropDownLabel2 = new-object System.Windows.Forms.Label
$DropDown = new-object System.Windows.Forms.ComboBox
$DropDown2 = new-object System.Windows.Forms.ComboBox
#Handler
$handler_searchldap_click=
{
$manager = ""
$dropdown2.items.clear()
$manager = get-aduser -f {name -like $dropdown2.text}
foreach ($thing in $manager){
$useraccountname = $thing.name
$DropDown2.Items.Add($useraccountname) | Out-Null
}
}
$InitialFormWindowState = New-Object System.Windows.Forms.FormWindowState
$OnLoadForm_StateCorrection=
{#Correct the initial state of the form to prevent the .Net maximized form issue
$form1.WindowState = $InitialFormWindowState
}
#----------------------------------------------
#region Generated Form Code
$form1.Text = "User Creation software"
$form1.Name = "form1"
$form1.DataBindings.DefaultDataSourceUpdateMode = 0
$System_Drawing_Size = New-Object System.Drawing.Size
$System_Drawing_Size.Width = 400
$System_Drawing_Size.Height = 200
$form1.ClientSize = $System_Drawing_Size
$DropDownArray = "Site1" , "Site2" , "Site3"
$DropDown2.Location = new-object System.Drawing.Size(125,80)
$DropDown2.Size = new-object System.Drawing.Size(150,27)
$dropdown2.DataBindings.DefaultDataSourceUpdateMode = 0
$dropdown2.TabIndex = 5
$dropdown2.Name = "dropdown2"
$DropDown2.add_TextUpdate({ Write-Host "TextUpdate. Updated text is: $($Dropdown2.Text)" })
$Form1.Controls.Add($DropDown2)
$DropDownLabel2 = new-object System.Windows.Forms.Label
$DropDownLabel2.Location = new-object System.Drawing.Size(50,80)
$DropDownLabel2.size = new-object System.Drawing.Size(50,27)
$DropDownLabel2.Text = "Manager:"
$Form1.Controls.Add($DropDownLabel2)
$DropDown.Location = new-object System.Drawing.Size(125,55)
$DropDown.Size = new-object System.Drawing.Size(150,27)
$dropdown.DataBindings.DefaultDataSourceUpdateMode = 0
$dropdown.TabIndex = 4
$dropdown.Name = "dropdown1"
$DropDownLabel = new-object System.Windows.Forms.Label
$DropDownLabel.Location = new-object System.Drawing.Size(50,58)
$DropDownLabel.size = new-object System.Drawing.Size(50,27)
$DropDownLabel.Text = "Location:"
$Form1.Controls.Add($DropDown)
$Form1.Controls.Add($DropDownLabel)
ForEach ($Item in $DropDownArray) {
$DropDown.Items.Add($Item) | Out-Null
}
###Button section
$searchldap.Location = New-Object System.Drawing.Size(275,80)
$searchldap.Size = New-Object System.Drawing.Size(100,20)
$searchldap.Text = "Search"
$searchldap.Add_Click($handler_searchldap_click)
$Form1.Controls.Add($searchldap)
#Save the initial state of the form
$InitialFormWindowState = $form1.WindowState
#Init the OnLoad event to correct the initial state of the form
$form1.add_Load($OnLoadForm_StateCorrection)
#Show the Form
$form1.ShowDialog()| Out-Null
} #end of function
GenerateForm

Answer 1

Try this:
$filter = [scriptblock]::Create("Name -like '*$($dropdown2.text)*'")
$manager = get-aduser -f $filter
Powershell does not expand local variables used in filter script blocks before it passes them to the DC (via the AD Gateway Service). To get around that, create the filter script block from an expandable string