Winforms 使用combobox从函数返回值

我有一个小GUI，可以连接到列表中的vCenter。表单按我想要的顺序打开，但我不能在它们之间传递值。我试过很多回电话，不知道还能做什么

这是代码。基本上，第一个表单打开并询问您想要哪个vCenter。然后提示您进行身份验证（这一切都非常有效）。但问题是在脚本完成后出现的。我没有得到任何返回值

function Connect-Vc ($vcArg)
 {  
  $Form2 = $null
  $selectedVC = $vcArg.selecteditem
  $viconnection = $null
  if ($global:defaultviserver -ne $null)
  {
   Disconnect-viserver * -confirm:$false
  }
  $clusterselection = $null
  $DropDownTo = $null
  $credential = Get-Credential -Message "Please Enter Elevated Credentials To Access $selectedVC.  You can enter assuming you're an administrator on $selectedVC."
  $username = $credential.Username
  $password = $credential.GetNetworkCredential().Password
  $viconnection = connect-viserver $selectedVC -User $username -Password $password

  [void] [System.Reflection.Assembly]::LoadWithPartialName("System.Windows.Forms")
  [void] [System.Reflection.Assembly]::LoadWithPartialName("System.Drawing")
  [void] [System.Windows.Forms.Application]::EnableVisualStyles()
  $Form2 = New-Object System.Windows.Forms.Form
  $Form2.AutoSize = $True
  $Form2.AutoSizeMode = "GrowAndShrink"
  $Form2.width = 600
  $Form2.height = 500
  $Form2.Text = ”Vcenter Selection”
 $Form2.StartPosition = "CenterScreen"

  #First item selection*******************

  $DropDownLabel1 = new-object System.Windows.Forms.Label
  $DropDownLabel1.Location = new-object System.Drawing.Size(140,10) 
  $DropDownLabel1.size = new-object System.Drawing.Size(130,30) 
  $DropDownLabel1.Text = "$selectedVC"
  $Form2.Controls.Add($DropDownLabel1)

  $DropDownLabel2 = new-object System.Windows.Forms.Label
  $DropDownLabel2.Location = new-object System.Drawing.Size(10,10) 
  $DropDownLabel2.size = new-object System.Drawing.Size(100,40) 
  $DropDownLabel2.Text = "Connected to Vcenter"
  $Form2.Controls.Add($DropDownLabel2)

  #Second item selection*******************
  [array]$clusterselection = get-cluster
  $DropDownTo = New-Object System.Windows.Forms.ComboBox
  $DropDownTo.Location = New-Object System.Drawing.Size(140,50)
  $DropDownTo.Size = New-Object System.Drawing.Size(130,30)
  $DropdownTo.DropDownStyle = 2
  ForEach ($Item2 in $clusterselection) 
   {
        [void] $DropDownTo.Items.Add($Item2)
      }
  $Form2.Controls.Add($DropDownTo)

  $DropDownLabel3 = new-object System.Windows.Forms.Label
  $DropDownLabel3.Location = new-object System.Drawing.Size(10,50) 
  $DropDownLabel3.size = new-object System.Drawing.Size(100,40) 
  $DropDownLabel3.Text = "Select Cluster Location"
  $Form2.Controls.Add($DropDownLabel3)

  #Third item selection*******************
  $DropDownType = New-Object System.Windows.Forms.ComboBox
  $DropDownType.Location = New-Object System.Drawing.Size(140,90)
  $DropDownType.Size = New-Object System.Drawing.Size(130,30)
  $DropDownType.DropDownStyle = 2
  ForEach ($Item3 in $typeOfServer) 
   {
        [void] $DropDownType.Items.Add($Item3)
      }
  $Form2.Controls.Add($DropDownType)

  $DropDownLabel4 = new-object System.Windows.Forms.Label
  $DropDownLabel4.Location = new-object System.Drawing.Size(10,90) 
  $DropDownLabel4.size = new-object System.Drawing.Size(100,40) 
  $DropDownLabel4.Text = "Select Type of Server"
  $Form2.Controls.Add($DropDownLabel4)

  #Fourth item Input*******************
  $InputName = New-Object System.Windows.Forms.Textbox
  $InputName.Location = New-Object System.Drawing.Size(140,130)
  $InputName.Size = New-Object System.Drawing.Size(130,30)
  $InputName.MaxLength = 15
  $Form2.Controls.Add($InputName)

  $inputLabel = new-object System.Windows.Forms.Label
  $inputLabel.Location = new-object System.Drawing.Size(10,130) 
  $inputLabel.size = new-object System.Drawing.Size(100,40) 
  $inputLabel.Text = "Enter Name of Server"
  $Form2.Controls.Add($inputLabel)

  #Fifth item selection*******************
  $dropDownMem = New-Object System.Windows.Forms.Combobox
  $dropDownMem.Location = New-Object System.Drawing.Size(140,170)
  $dropDownMem.Size = New-Object System.Drawing.Size(130,30)
  $dropDownMem.DropDownStyle = 2
  ForEach ($Item5 in $mem) 
   {
        [void] $dropDownMem.Items.Add($Item5)
      }
  $Form2.Controls.Add($dropDownMem)

  $DropDownLabel5 = new-object System.Windows.Forms.Label
  $DropDownLabel5.Location = new-object System.Drawing.Size(10,170) 
  $DropDownLabel5.size = new-object System.Drawing.Size(100,40) 
  $DropDownLabel5.Text = "Select Memory Quantity in GB"
  $Form2.Controls.Add($DropDownLabel5)

  #Sixth item selection*******************
  $dropDownvCpu = New-Object System.Windows.Forms.Combobox
  $dropDownvCpu.Location = New-Object System.Drawing.Size(140,210)
  $dropDownvCpu.Size = New-Object System.Drawing.Size(130,30)
  $dropDownvCpu.DropDownStyle = 2
  ForEach ($Item6 in $vCpu) 
   {
        [void] $dropDownvCpu.Items.Add($Item6)
      }
  $Form2.Controls.Add($dropDownvCpu)

  $DropDownLabel6 = new-object System.Windows.Forms.Label
  $DropDownLabel6.Location = new-object System.Drawing.Size(10,210)
  $DropDownLabel6.size = new-object System.Drawing.Size(100,40) 
  $DropDownLabel6.Text = "Select Virtual CPU's"
  $Form2.Controls.Add($DropDownLabel6)

  #Seventh item selection*******************
  $dropDownOS = New-Object System.Windows.Forms.Combobox
  $dropDownOS.Location = New-Object System.Drawing.Size(140,250)
  $dropDownOS.Size = New-Object System.Drawing.Size(130,30)
  $dropDownOS.DropDownStyle = 2
  ForEach ($Item7 in $operatingSystem) 
   {
        [void] $dropDownOS.Items.Add($Item7)
      }
  $Form2.Controls.Add($dropDownOS)

  $DropDownLabel7 = new-object System.Windows.Forms.Label
  $DropDownLabel7.Location = new-object System.Drawing.Size(10,250)
  $DropDownLabel7.size = new-object System.Drawing.Size(100,40) 
  $DropDownLabel7.Text = "Select Operating System"
  $Form2.Controls.Add($DropDownLabel7)

  #Defines buttons for click to accept*********************
  #$Button1 = new-object System.Windows.Forms.Button
  #$Button1.Location = new-object System.Drawing.Size(10,300)
  #$Button1.Size = new-object System.Drawing.Size(100,20)
  #$Button1.Text = "Provision Vm"
  #$Button1.Add_Click({Provision-VM})
  #$Button1.Add_Click({Get-Account $oRphanedAcct})
  #Defines buttons for click to accept*********************
  $Button2 = new-object System.Windows.Forms.Button
  $Button2.Location = new-object System.Drawing.Size(10,330)
  $Button2.Size = new-object System.Drawing.Size(100,20)
  $Button2.Text = "Provision Vm"
  $Button2.Add_Click({Provision-VM -arg1 "$choice4" -arg2 "$choice5" -arg3 "$Choice3"})
  #Defines buttons for click to accept*********************
  $Button3 = new-object System.Windows.Forms.Button
  $Button3.Location = new-object System.Drawing.Size(140,330)
  $Button3.Size = new-object System.Drawing.Size(100,20)
  $Button3.Text = "Close Form"
  #$Button3.Add_Click({Return-Drop})
  $Button3.Add_Click({$Form2.Dispose()})
  #Defines buttons for click to accept*********************
  $Button4 = new-object System.Windows.Forms.Button
  $Button4.Location = new-object System.Drawing.Size(275,330)
  $Button4.Size = new-object System.Drawing.Size(100,20)
  $Button4.Text = "Ok Button"
  $Button4.Dialogresult = [System.Windows.Forms.DialogResult]::OK
  $Form2.AcceptButton = $Button4
  $Form2.Controls.Add($Button2)
  $Form2.Controls.Add($Button3)
  $Form2.Controls.Add($Button4)
  $Form2.Topmost = $True
  $Form2.ShowDialog()
  $Form2.refresh()
  return $DropdownTo.SelectedItem
  return $DropDownType.SelectedItem.ToString()
  return $InputName.SelectedItem.ToString()
  return $DropDownMem.SelectedItem.ToString()
  return $DropDownVcpu.SelectedItem.ToString()
  return $DropDownOS.SelectedItem.ToString()
  return $Button3
  return $Button4
 }

#Main function definition********************
 function Menu
 {
  $clusterselection = $null
  $global:defaultviserver = $null 
   [array]$VCItems = "VCSelection","VCSelection2","VCSelection3"
  [array]$typeOfServer = "Vanilla", "IIS", "SQL", "SQL_Cluster_Node"
  [array]$operatingSystem = "Windows2012", "Windows2016"
  [array]$mem = "2","4","6","8","10","12","32","64"
  [array]$vCpu = "2","4","6","8","10","12"
  #Function for Closing Form Upon no input
  function Return-Drop 
  {
   If (($dropDownVC.SelectedItem -ne $null) -or ($DropDownTO.SelectedItem -ne $null) -or ($DropDownType.SelectedItem -ne $null))
   {
    $Form.Close()
   }
  }
  #Function for connecting to Vcenter

  [void] [System.Reflection.Assembly]::LoadWithPartialName("System.Windows.Forms")
  [void] [System.Reflection.Assembly]::LoadWithPartialName("System.Drawing")
  [void] [System.Windows.Forms.Application]::EnableVisualStyles()
  $Form = New-Object System.Windows.Forms.Form
  $Form.AutoSize = $True
  $Form.AutoSizeMode = "GrowAndShrink"
  $Form.width = 600
  $Form.height = 500
  $Form.Text = ”Vcenter Selection”
 $Form.StartPosition = "CenterScreen"

  #First item selection*******************
  $DropDownVC = New-Object System.Windows.Forms.ComboBox
  $DropDownVC.Location = New-Object System.Drawing.Size(140,10)
  $DropDownVC.Size = New-Object System.Drawing.Size(130,30)
  $DropDownVC.DropDownStyle = 2
  $DropDownVC.TabIndex = 0
  ForEach ($Item1 in $VCItems) 
   {
        [void] $DropDownVC.Items.Add($Item1)
      }
  $DropDownVC.SelectedItem = $DropDownVC.Items[0]
  $Form.Controls.Add($DropDownVC)
  $DropDownLabel1 = new-object System.Windows.Forms.Label
  $DropDownLabel1.Location = new-object System.Drawing.Size(10,10) 
  $DropDownLabel1.size = new-object System.Drawing.Size(100,40) 
  $DropDownLabel1.Text = "Select Vcenter to connect to"
  $Form.Controls.Add($DropDownLabel1)
  #Defines buttons for click to connect to VC*********************
  $Button5 = new-object System.Windows.Forms.Button
  $Button5.Location = new-object System.Drawing.Size(290,10)
  $Button5.Size = new-object System.Drawing.Size(100,20)
  $Button5.Text = "Connect"
  $Button5.Add_Click({$form.visible = $false;$t = Connect-Vc -vcArg $DropDownVC})
  $Form.Controls.Add($Button5)
  $Form.Topmost = $True
  $Form.Add_Shown({$Form.Activate()})
  $Form.ShowDialog()
  $Choice1 = $DropDownVC.SelectedItem.ToString()

    enter code here

 return $Choice1
 }

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请将这堵代码墙简化为一堵墙。如果要在函数之间传递数据，请在

$script:

作用域中定义变量以供重用。